| Data through 1998 | Years | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BIRMINGHAM AP,AL | 55 | 8.1 | 8.7 | 9.0 | 8.2 | 6.8 | 6.0 | 5.7 | 5.4 | 6.3 | 6.2 | 7.2 | 7.7 | 7.1 |
| HUNTSVILLE, AL | 31 | 9.2 | 9.6 | 10.0 | 9.2 | 7.9 | 6.9 | 6.2 | 5.8 | 6.7 | 7.4 | 8.3 | 9.2 | 8.0 |
| MOBILE, AL | 50 | 10.1 | 10.5 | 10.8 | 10.1 | 8.7 | 7.5 | 6.9 | 6.7 | 7.7 | 8.1 | 9.1 | 9.8 | 8.8 |
| MONTGOMERY, AL | 54 | 7.7 | 8.2 | 8.3 | 7.3 | 6.1 | 5.8 | 5.7 | 5.2 | 5.9 | 5.7 | 6.5 | 7.1 | 6.6 |
| ANCHORAGE, AK | 45 | 6.4 | 6.9 | 7.1 | 7.3 | 8.5 | 8.4 | 7.3 | 6.9 | 6.7 | 6.7 | 6.4 | 6.3 | 7.1 |
| ANNETTE, AK | 34 | 11.9 | 12.2 | 10.8 | 11.0 | 9.1 | 8.8 | 7.9 | 8.2 | 9.1 | 11.7 | 12.0 | 12.3 | 10.4 |
| BARROW, AK | 65 | 11.8 | 11.2 | 11.2 | 11.5 | 12.0 | 11.5 | 11.7 | 12.4 | 13.2 | 13.3 | 12.4 | 11.6 | 12.0 |
| BARTER IS.,AK | 33 | 15.1 | 14.4 | 13.7 | 12.0 | 12.7 | 11.6 | 10.9 | 11.8 | 13.2 | 14.8 | 14.9 | 13.9 | 13.2 |
| BETHEL, AK | 40 | 14.6 | 15.1 | 13.9 | 12.9 | 11.6 | 11.2 | 10.7 | 11.1 | 11.7 | 12.5 | 13.4 | 13.9 | 12.7 |
| BETTLES,AK | 23 | 6.0 | 6.4 | 7.1 | 7.5 | 7.4 | 7.0 | 6.6 | 6.3 | 6.7 | 6.5 | 6.0 | 5.8 | 6.6 |
| BIG DELTA,AK | 22 | 11.0 | 10.0 | 8.5 | 7.9 | 8.2 | 6.7 | 6.0 | 6.7 | 7.4 | 8.5 | 9.9 | 9.5 | 8.4 |
| COLD BAY,AK | 43 | 17.5 | 17.8 | 17.4 | 17.6 | 16.3 | 15.9 | 15.6 | 16.4 | 16.3 | 16.7 | 17.6 | 17.6 | 16.9 |
| FAIRBANKS, AK | 47 | 3.0 | 4.0 | 5.3 | 6.6 | 7.7 | 7.1 | 6.6 | 6.2 | 6.2 | 5.4 | 3.8 | 3.1 | 5.4 |
| GULKANA,AK | 10 | 5.1 | 5.2 | 6.4 | 8.9 | 9.1 | 8.7 | 7.9 | 8.0 | 7.5 | 6.3 | 4.8 | 3.6 | 6.8 |
| HOMER, AK | 24 | 8.0 | 8.0 | 8.0 | 8.2 | 8.4 | 7.9 | 7.3 | 6.9 | 7.3 | 7.5 | 8.0 | 7.9 | 7.8 |
| JUNEAU, AK | 53 | 8.0 | 8.4 | 8.4 | 8.6 | 8.3 | 7.7 | 7.5 | 7.4 | 8.0 | 9.5 | 8.4 | 8.9 | 8.3 |
| KING SALMON, AK | 43 | 10.5 | 11.1 | 11.5 | 11.0 | 11.2 | 10.6 | 9.9 | 10.2 | 10.5 | 10.4 | 10.4 | 10.3 | 10.6 |
| KODIAK, AK | 45 | 12.7 | 12.6 | 12.5 | 11.6 | 10.7 | 9.3 | 7.7 | 8.4 | 9.7 | 11.4 | 12.5 | 12.7 | 11.0 |
| KOTZEBUE, AK | 52 | 14.2 | 12.9 | 12.1 | 12.1 | 11.0 | 12.2 | 12.7 | 13.2 | 13.3 | 13.7 | 14.6 | 13.0 | 12.9 |
| MCGRATH, AK | 48 | 3.2 | 4.4 | 5.3 | 6.5 | 6.7 | 6.4 | 5.9 | 5.8 | 5.9 | 5.4 | 3.7 | 3.2 | 5.2 |
| NOME, AK | 51 | 10.9 | 10.8 | 10.1 | 10.1 | 10.0 | 9.7 | 9.7 | 10.4 | 11.0 | 10.6 | 11.7 | 10.4 | 10.4 |
| ST. PAUL ISLAND, AK | 24 | 19.9 | 20.3 | 19.1 | 17.6 | 15.3 | 13.7 | 12.2 | 13.9 | 15.5 | 17.6 | 20.3 | 20.6 | 17.2 |
| TALKEETNA, AK | 15 | 6.4 | 5.7 | 5.5 | 4.8 | 4.9 | 5.2 | 4.3 | 3.8 | 3.7 | 3.8 | 5.1 | 5.0 | 4.8 |
| VALDEZ, AK | 18 | 7.4 | 8.1 | 6.6 | 5.2 | 5.8 | 5.9 | 4.9 | 4.2 | 4.3 | 6.4 | 7.9 | 7.0 | 6.1 |
| YAKUTAT, AK | 50 | 7.3 | 7.6 | 7.1 | 7.2 | 7.6 | 7.1 | 6.7 | 6.5 | 7.0 | 7.9 | 7.4 | 8.0 | 7.3 |
| FLAGSTAFF, AZ | 31 | 6.5 | 6.6 | 7.1 | 7.5 | 7.3 | 7.0 | 5.5 | 5.0 | 5.6 | 5.8 | 6.7 | 6.6 | 6.4 |
| PHOENIX, AZ | 53 | 5.3 | 5.8 | 6.6 | 6.9 | 7.0 | 6.7 | 7.1 | 6.6 | 6.3 | 5.8 | 5.3 | 5.1 | 6.2 |
| TUCSON, AZ | 53 | 7.9 | 8.1 | 8.6 | 8.9 | 8.8 | 8.7 | 8.4 | 7.9 | 8.3 | 8.2 | 8.1 | 7.8 | 8.3 |
| WINSLOW, AZ | 38 | 7.1 | 8.5 | 10.5 | 11.3 | 10.8 | 10.6 | 9.0 | 8.4 | 8.2 | 7.6 | 7.3 | 6.7 | 8.8 |
| YUMA, AZ | 28 | 7.3 | 7.4 | 7.9 | 8.3 | 8.3 | 8.5 | 9.5 | 8.9 | 7.3 | 6.6 | 6.9 | 7.2 | 7.8 |
| FORT SMITH, AR | 53 | 8.2 | 8.5 | 9.4 | 8.9 | 7.7 | 6.7 | 6.3 | 6.3 | 6.6 | 6.8 | 7.8 | 8.1 | 7.6 |
| LITTLE ROCK, AR | 56 | 8.4 | 8.9 | 9.6 | 9.0 | 7.6 | 7.1 | 6.7 | 6.3 | 6.6 | 6.8 | 8.0 | 8.1 | 7.8 |
| BAKERSFIELD, CA | 46 | 5.2 | 5.8 | 6.5 | 7.1 | 7.9 | 7.9 | 7.2 | 6.8 | 6.2 | 5.5 | 5.1 | 5.0 | 6.4 |
| BLUE CANYON, CA | 15 | 7.9 | 7.9 | 7.7 | 6.6 | 6.6 | 6.4 | 5.8 | 5.9 | 6.4 | 6.9 | 6.8 | 6.8 | 6.8 |
| EUREKA, CA. | 54 | 6.9 | 7.2 | 7.6 | 8.0 | 7.9 | 7.4 | 6.8 | 5.8 | 5.5 | 5.6 | 6.0 | 6.4 | 6.8 |
| FRESNO, CA | 49 | 5.2 | 5.7 | 6.7 | 7.4 | 8.1 | 8.3 | 7.4 | 6.8 | 6.1 | 5.2 | 4.7 | 4.9 | 6.4 |
| LONG BEACH, CA | 29 | 5.4 | 6.1 | 6.8 | 7.4 | 7.2 | 7.0 | 6.8 | 6.6 | 6.2 | 5.7 | 5.3 | 5.1 | 6.3 |
| LOS ANGELES AP, CA | 50 | 6.7 | 7.4 | 8.1 | 8.5 | 8.4 | 8.0 | 7.9 | 7.7 | 7.3 | 6.9 | 6.7 | 6.6 | 7.5 |
| LOS ANGELES C.O., CA | 24 | 6.8 | 6.9 | 7.0 | 6.6 | 6.3 | 5.7 | 5.4 | 5.3 | 5.3 | 5.7 | 6.4 | 6.6 | 6.2 |
| MOUNT SHASTA, CA | 3 | 5.0 | 5.2 | 5.8 | 6.2 | 5.4 | 5.4 | 4.4 | 4.2 | 4.6 | 4.2 | 5.2 | 5.4 | 5.1 |
| REDDING, CA | 12 | 6.5 | 7.0 | 7.6 | 7.2 | 7.4 | 7.7 | 6.9 | 6.3 | 6.2 | 6.3 | 6.0 | 6.7 | 6.8 |
| SACRAMENTO, CA | 48 | 7.2 | 7.4 | 8.5 | 8.6 | 9.1 | 9.7 | 8.9 | 8.4 | 7.4 | 6.4 | 6.0 | 6.6 | 7.9 |
| SAN DIEGO, CA | 58 | 6.0 | 6.6 | 7.5 | 7.8 | 7.9 | 7.8 | 7.5 | 7.4 | 7.1 | 6.5 | 5.9 | 5.6 | 7.0 |
| SAN FRANCISCO AP, CA | 71 | 7.2 | 8.6 | 10.5 | 12.2 | 13.4 | 14.0 | 13.6 | 12.8 | 11.1 | 9.4 | 7.5 | 7.1 | 10.6 |
| SAN FRANCISCO C.O., CA | 28 | 6.7 | 7.5 | 8.5 | 9.5 | 10.4 | 10.9 | 11.2 | 10.5 | 9.1 | 7.6 | 6.3 | 6.5 | 8.7 |
| SANTA BARBARA, CA | 6 | 5.2 | 6.0 | 6.7 | 7.7 | 7.1 | 6.7 | 6.5 | 6.1 | 5.5 | 5.5 | 5.3 | 4.5 | 6.1 |
| SANTA MARIA, CA | 18 | 6.6 | 7.3 | 8.1 | 8.0 | 8.3 | 8.0 | 6.5 | 6.3 | 5.9 | 6.3 | 6.5 | 6.4 | 7.0 |
| STOCKTON, CA | 38 | 6.7 | 7.0 | 7.7 | 8.4 | 9.2 | 9.2 | 8.2 | 7.7 | 7.1 | 6.4 | 5.8 | 6.4 | 7.5 |
| ALAMOSA, CO | 7 | 5.2 | 6.1 | 8.1 | 9.7 | 9.8 | 9.1 | 7.1 | 6.1 | 6.4 | 6.5 | 5.9 | 4.9 | 7.1 |
| COLORADO SPRINGS, CO | 50 | 9.4 | 10.0 | 11.2 | 11.6 | 11.2 | 10.4 | 9.3 | 8.9 | 9.4 | 9.6 | 9.5 | 9.4 | 10.0 |
| DENVER, CO | 47 | 8.6 | 8.7 | 9.6 | 10.0 | 9.3 | 8.8 | 8.3 | 8.0 | 7.9 | 7.8 | 8.2 | 8.4 | 8.6 |
| GRAND JUNCTION, CO | 52 | 5.7 | 6.7 | 8.4 | 9.4 | 9.6 | 9.8 | 9.4 | 9.1 | 9.0 | 7.9 | 6.8 | 6.0 | 8.2 |
| PUEBLO, CO | 43 | 7.8 | 8.5 | 9.6 | 10.3 | 9.7 | 9.3 | 8.7 | 7.9 | 7.9 | 7.4 | 7.5 | 7.7 | 8.5 |
| BRIDGEPORT, CT | 26 | 13.0 | 13.4 | 13.3 | 12.8 | 11.3 | 10.2 | 9.7 | 9.8 | 10.9 | 11.6 | 12.4 | 12.5 | 11.7 |
| HARTFORD, CT | 44 | 9.0 | 9.4 | 9.9 | 9.8 | 8.7 | 8.0 | 7.3 | 7.0 | 7.3 | 7.8 | 8.4 | 8.7 | 8.4 |
| WILMINGTON, DE | 50 | 9.8 | 10.3 | 11.0 | 10.4 | 9.0 | 8.3 | 7.8 | 7.4 | 7.8 | 8.1 | 9.2 | 9.3 | 9.0 |
| WASHINGTON DULLES AP, D.C. | 36 | 8.2 | 8.6 | 9.0 | 8.8 | 7.4 | 6.8 | 6.2 | 5.8 | 6.2 | 6.6 | 7.6 | 7.7 | 7.4 |
| WASHINGTON NAT'L AP, D.C. | 50 | 10.0 | 10.3 | 10.9 | 10.5 | 9.3 | 8.9 | 8.3 | 8.1 | 8.3 | 8.7 | 9.4 | 9.6 | 9.4 |
| Data through 1998 | Years | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| APALACHICOLA, FL | 44 | 8.3 | 8.7 | 8.9 | 8.5 | 7.7 | 7.1 | 6.4 | 6.4 | 7.8 | 8.0 | 8.0 | 8.0 | 7.8 |
| DAYTONA BEACH, FL | 53 | 8.9 | 9.6 | 9.9 | 9.5 | 8.9 | 8.0 | 7.3 | 7.0 | 8.0 | 9.0 | 8.3 | 8.3 | 8.6 |
| FORT MYERS, FL | 53 | 8.3 | 8.9 | 9.3 | 8.8 | 8.0 | 7.2 | 6.6 | 6.7 | 7.4 | 8.4 | 8.1 | 7.9 | 8.0 |
| GAINESVILLE, FL | 15 | 7.2 | 7.8 | 8.1 | 7.4 | 6.9 | 6.4 | 5.8 | 5.6 | 5.8 | 6.4 | 6.4 | 6.2 | 6.7 |
| JACKSONVILLE, FL | 49 | 8.1 | 9.0 | 9.1 | 8.5 | 7.9 | 7.7 | 7.0 | 6.7 | 7.4 | 7.9 | 7.6 | 7.7 | 7.9 |
| KEY WEST, FL | 45 | 11.8 | 12.0 | 12.2 | 12.2 | 10.6 | 9.6 | 9.5 | 9.2 | 9.6 | 10.9 | 12.0 | 11.8 | 10.9 |
| MIAMI, FL | 49 | 9.5 | 10.1 | 10.5 | 10.5 | 9.5 | 8.3 | 7.9 | 7.9 | 8.2 | 9.2 | 9.7 | 9.2 | 9.2 |
| ORLANDO, FL | 50 | 9.0 | 9.6 | 9.9 | 9.4 | 8.8 | 8.0 | 7.3 | 7.2 | 7.6 | 8.6 | 8.6 | 8.5 | 8.5 |
| PENSACOLA, FL | 34 | 9.0 | 9.4 | 9.8 | 9.5 | 8.6 | 7.6 | 7.0 | 6.7 | 7.7 | 7.9 | 8.3 | 8.9 | 8.4 |
| TALLAHASSEE, FL | 37 | 6.7 | 7.3 | 7.5 | 6.8 | 6.2 | 5.7 | 5.0 | 5.0 | 5.9 | 6.3 | 6.1 | 6.3 | 6.2 |
| TAMPA, FL | 52 | 8.6 | 9.1 | 9.4 | 9.2 | 8.6 | 7.9 | 7.1 | 6.9 | 7.6 | 8.4 | 8.2 | 8.3 | 8.3 |
| VERO BEACH, FL | 15 | 8.8 | 9.3 | 10.0 | 9.5 | 9.0 | 7.8 | 7.0 | 6.6 | 7.3 | 8.6 | 8.8 | 7.9 | 8.4 |
| WEST PALM BEACH, FL | 56 | 10.1 | 10.5 | 11.0 | 10.9 | 9.9 | 8.3 | 7.7 | 7.7 | 8.7 | 10.1 | 10.4 | 10.0 | 9.6 |
| ATHENS, GA | 43 | 8.4 | 8.8 | 8.8 | 8.3 | 7.1 | 6.6 | 6.3 | 5.8 | 6.4 | 6.7 | 7.3 | 8.0 | 7.4 |
| ATLANTA, GA | 60 | 10.4 | 10.7 | 10.9 | 10.1 | 8.7 | 8.1 | 7.7 | 7.3 | 8.0 | 8.5 | 9.1 | 9.8 | 9.1 |
| AUGUSTA,GA | 47 | 6.9 | 7.5 | 7.9 | 7.4 | 6.4 | 6.0 | 5.8 | 5.3 | 5.4 | 5.7 | 5.9 | 6.5 | 6.4 |
| COLUMBUS, GA | 40 | 7.3 | 7.9 | 8.0 | 7.2 | 6.6 | 6.1 | 5.8 | 5.5 | 6.4 | 6.4 | 6.4 | 6.9 | 6.7 |
| MACON, GA | 50 | 8.0 | 8.5 | 8.9 | 8.4 | 7.4 | 7.0 | 6.7 | 6.2 | 6.7 | 6.6 | 6.9 | 7.5 | 7.4 |
| SAVANNAH, GA | 48 | 8.5 | 9.0 | 9.2 | 8.6 | 7.6 | 7.4 | 7.1 | 6.7 | 7.2 | 7.4 | 7.3 | 7.8 | 7.8 |
| HILO, HI | 49 | 7.4 | 7.7 | 7.7 | 7.5 | 7.4 | 7.1 | 6.9 | 6.8 | 6.8 | 6.7 | 6.8 | 7.2 | 7.2 |
| HONOLULU,HI | 49 | 9.4 | 10.1 | 11.3 | 11.7 | 11.6 | 12.6 | 13.1 | 12.8 | 11.2 | 10.5 | 10.7 | 10.4 | 11.3 |
| KAHULUI, HI | 26 | 10.7 | 11.1 | 12.2 | 13.3 | 13.2 | 14.8 | 15.5 | 14.7 | 12.9 | 12.1 | 11.8 | 11.3 | 12.8 |
| LIHUE, HI | 48 | 11.0 | 11.6 | 12.7 | 13.4 | 12.8 | 13.2 | 13.7 | 13.1 | 11.7 | 11.6 | 12.4 | 11.9 | 12.4 |
| BOISE, ID | 59 | 8.0 | 8.9 | 9.9 | 9.9 | 9.4 | 9.0 | 8.4 | 8.2 | 8.2 | 8.3 | 8.4 | 8.1 | 8.7 |
| POCATELLO, ID | 46 | 10.6 | 10.6 | 11.1 | 11.6 | 10.5 | 10.1 | 9.1 | 8.9 | 9.0 | 9.4 | 10.3 | 9.9 | 10.1 |
| CAIRO,IL | 22 | 9.8 | 9.8 | 10.6 | 10.2 | 8.2 | 7.4 | 6.5 | 6.2 | 7.0 | 7.3 | 9.1 | 9.3 | 8.5 |
| CHICAGO,IL | 40 | 11.7 | 11.4 | 11.9 | 11.9 | 10.5 | 9.3 | 8.4 | 8.2 | 8.9 | 10.1 | 11.2 | 11.0 | 10.4 |
| MOLINE, IL | 55 | 10.8 | 10.6 | 11.9 | 11.8 | 10.1 | 8.8 | 7.5 | 7.1 | 8.0 | 9.2 | 10.6 | 10.4 | 9.7 |
| PEORIA, IL | 55 | 11.0 | 10.9 | 12.0 | 11.6 | 9.9 | 8.9 | 7.8 | 7.5 | 8.3 | 9.3 | 10.7 | 10.6 | 9.9 |
| ROCKFORD, IL | 48 | 10.5 | 10.6 | 11.6 | 11.8 | 10.4 | 9.3 | 8.1 | 7.7 | 8.4 | 9.5 | 10.6 | 10.4 | 9.9 |
| SPRINGFIELD, IL | 51 | 12.3 | 12.2 | 13.4 | 13.0 | 11.1 | 9.6 | 8.4 | 7.9 | 8.8 | 10.2 | 12.3 | 12.0 | 10.9 |
| EVANSVILLE, IN | 58 | 9.2 | 9.3 | 10.0 | 9.6 | 7.9 | 7.1 | 6.2 | 5.8 | 6.4 | 6.9 | 8.7 | 8.9 | 8.0 |
| FORT WAYNE, IN | 52 | 11.5 | 11.0 | 11.7 | 11.6 | 10.0 | 8.9 | 8.0 | 7.3 | 8.2 | 9.1 | 10.9 | 11.1 | 9.9 |
| INDIANAPOLIS, IN | 50 | 10.9 | 10.8 | 11.6 | 11.2 | 9.6 | 8.5 | 7.5 | 7.2 | 7.9 | 8.9 | 10.5 | 10.5 | 9.6 |
| SOUTH BEND, IN | 50 | 11.9 | 11.2 | 11.9 | 11.7 | 10.2 | 9.1 | 8.1 | 7.7 | 8.5 | 9.5 | 11.0 | 11.2 | 10.2 |
| DES MOINES, IA | 49 | 11.4 | 11.2 | 12.5 | 12.6 | 11.0 | 10.1 | 8.9 | 8.6 | 9.4 | 10.3 | 11.3 | 11.1 | 10.7 |
| SIOUX CITY, IA | 57 | 11.4 | 11.2 | 12.3 | 13.2 | 11.8 | 10.7 | 9.2 | 9.1 | 9.9 | 10.5 | 11.4 | 11.0 | 11.0 |
| WATERLOO, IA | 42 | 11.4 | 11.4 | 12.3 | 12.6 | 11.1 | 9.8 | 8.4 | 8.3 | 9.0 | 10.2 | 11.1 | 11.1 | 10.6 |
| CONCORDIA, KS | 36 | 11.9 | 12.1 | 13.7 | 13.8 | 12.1 | 11.7 | 11.3 | 10.9 | 11.3 | 11.7 | 11.9 | 11.6 | 12.0 |
| DODGE CITY, KS | 56 | 13.5 | 13.9 | 15.6 | 15.5 | 14.6 | 14.0 | 13.1 | 12.5 | 13.5 | 13.5 | 13.7 | 13.4 | 13.9 |
| GOODLAND, KS | 50 | 12.4 | 12.4 | 14.1 | 14.4 | 13.5 | 12.7 | 11.9 | 11.5 | 12.0 | 11.9 | 11.9 | 11.9 | 12.5 |
| TOPEKA, KS | 49 | 9.8 | 10.2 | 11.8 | 11.7 | 10.2 | 9.4 | 8.4 | 8.0 | 8.6 | 9.1 | 9.9 | 9.6 | 9.7 |
| WICHITA, KS | 45 | 12.0 | 12.5 | 14.0 | 14.0 | 12.3 | 12.2 | 11.3 | 11.1 | 11.6 | 11.9 | 12.2 | 11.8 | 12.2 |
| GREATER CINCINNATI AP | 51 | 10.5 | 10.4 | 11.0 | 10.6 | 8.7 | 7.9 | 7.2 | 6.8 | 7.4 | 8.1 | 9.7 | 10.0 | 9.0 |
| JACKSON, KY | 17 | 7.6 | 7.7 | 8.0 | 8.1 | 6.4 | 5.7 | 5.4 | 5.0 | 5.7 | 6.3 | 7.4 | 7.5 | 6.7 |
| LEXINGTON, KY | 51 | 10.7 | 10.6 | 11.1 | 10.4 | 8.6 | 7.9 | 7.2 | 6.8 | 7.6 | 8.1 | 9.9 | 10.3 | 9.1 |
| LOUISVILLE, KY | 51 | 9.5 | 9.5 | 10.1 | 9.7 | 8.0 | 7.4 | 6.8 | 6.4 | 6.8 | 7.2 | 8.9 | 9.1 | 8.3 |
| PADUCAH KY | 14 | 9.1 | 9.2 | 9.9 | 9.3 | 7.7 | 6.5 | 6.1 | 5.3 | 5.9 | 6.8 | 8.7 | 8.6 | 7.8 |
| BATON ROUGE, LA | 47 | 8.8 | 9.2 | 9.3 | 8.7 | 7.6 | 6.5 | 5.9 | 5.6 | 6.5 | 6.6 | 7.5 | 8.2 | 7.5 |
| LAKE CHARLES, LA | 37 | 9.9 | 10.1 | 10.4 | 10.0 | 8.7 | 7.5 | 6.4 | 6.2 | 7.1 | 7.8 | 9.0 | 9.4 | 8.5 |
| NEW ORLEANS, LA | 50 | 9.3 | 9.8 | 9.9 | 9.4 | 8.1 | 6.8 | 6.1 | 5.9 | 7.3 | 7.6 | 8.7 | 9.0 | 8.2 |
| SHREVEPORT, LA | 46 | 9.2 | 9.6 | 10.0 | 9.6 | 8.3 | 7.6 | 7.1 | 6.6 | 7.2 | 7.4 | 8.5 | 8.8 | 8.3 |
| CARIBOU, ME | 18 | 11.9 | 11.4 | 12.4 | 11.4 | 11.0 | 10.0 | 9.3 | 8.7 | 9.8 | 10.5 | 10.5 | 10.9 | 10.7 |
| PORTLAND, ME | 58 | 9.1 | 9.4 | 10.0 | 9.9 | 9.1 | 8.2 | 7.6 | 7.5 | 7.8 | 8.4 | 8.8 | 9.0 | 8.7 |
| BALTIMORE, MD | 48 | 9.6 | 10.1 | 10.7 | 10.4 | 8.9 | 8.2 | 7.7 | 7.6 | 7.8 | 8.3 | 8.9 | 9.0 | 8.9 |
| BLUE HILL, MA | 57 | 17.4 | 17.3 | 17.4 | 16.6 | 14.7 | 13.8 | 12.9 | 12.6 | 13.5 | 15.2 | 16.3 | 16.8 | 15.4 |
| BOSTON, MA | 41 | 13.8 | 13.9 | 13.7 | 13.1 | 12.1 | 11.4 | 11.0 | 10.8 | 11.3 | 11.9 | 12.8 | 13.5 | 12.4 |
| WORCESTER, MA | 32 | 11.8 | 11.6 | 11.4 | 11.0 | 10.1 | 8.9 | 8.4 | 8.3 | 8.6 | 9.4 | 10.3 | 10.9 | 10.1 |
| ALPENA, MI | 38 | 8.8 | 8.4 | 8.9 | 9.2 | 8.3 | 7.5 | 7.0 | 6.7 | 7.1 | 7.8 | 8.5 | 8.4 | 8.1 |
| DETROIT, MI | 40 | 12.0 | 11.4 | 11.7 | 11.5 | 10.1 | 9.2 | 8.5 | 8.1 | 8.7 | 9.8 | 11.2 | 11.3 | 10.3 |
| FLINT, MI | 57 | 11.8 | 11.2 | 11.8 | 11.5 | 10.1 | 9.0 | 8.1 | 7.8 | 8.8 | 9.8 | 11.2 | 11.3 | 10.2 |
| GRAND RAPIDS, MI | 35 | 11.4 | 10.6 | 11.1 | 11.0 | 9.7 | 8.9 | 8.3 | 7.9 | 8.3 | 9.4 | 10.5 | 10.7 | 9.8 |
| HOUGHTON LAKE, MI | 17 | 10.0 | 9.1 | 9.2 | 9.6 | 8.8 | 7.9 | 7.5 | 7.0 | 7.8 | 8.9 | 9.6 | 9.4 | 8.7 |
| LANSING, MI | 39 | 11.8 | 10.9 | 11.2 | 11.1 | 9.9 | 8.9 | 8.0 | 7.5 | 8.2 | 9.4 | 10.7 | 11.0 | 9.9 |
| MUSKEGON, MI | 37 | 12.4 | 11.6 | 11.8 | 11.6 | 9.9 | 9.4 | 8.8 | 8.6 | 9.3 | 10.8 | 11.9 | 11.8 | 10.7 |
| SAULT STE. MARIE, MI | 57 | 9.6 | 9.3 | 10.0 | 10.3 | 9.7 | 8.5 | 7.8 | 7.7 | 8.6 | 9.2 | 9.7 | 9.6 | 9.2 |
| DULUTH, MN | 49 | 11.6 | 11.3 | 11.8 | 12.3 | 11.6 | 10.4 | 9.4 | 9.4 | 10.4 | 11.2 | 11.6 | 11.2 | 11.0 |
| INTERNATIONAL FALLS, MN | 46 | 8.9 | 8.8 | 9.4 | 9.9 | 9.4 | 8.5 | 7.7 | 7.5 | 8.6 | 9.3 | 9.4 | 8.8 | 8.9 |
| MINNEAPOLIS - ST. PAUL, MN | 60 | 10.5 | 10.4 | 11.3 | 12.2 | 11.1 | 10.4 | 9.4 | 9.2 | 10.0 | 10.6 | 11.0 | 10.4 | 10.5 |
| ROCHESTER, MN | 38 | 14.3 | 13.7 | 14.3 | 14.3 | 13.2 | 12.1 | 10.8 | 10.6 | 11.7 | 12.9 | 13.7 | 13.7 | 12.9 |
| SAINT CLOUD, MN | 12 | 8.4 | 8.0 | 9.1 | 9.7 | 9.0 | 8.1 | 7.1 | 6.4 | 7.3 | 8.4 | 8.5 | 8.0 | 8.2 |
| JACKSON, MS | 35 | 8.3 | 8.6 | 8.9 | 8.2 | 7.0 | 6.1 | 5.5 | 5.3 | 6.1 | 6.3 | 7.2 | 7.9 | 7.1 |
| MERIDIAN, MS | 39 | 7.1 | 7.5 | 7.9 | 7.1 | 6.0 | 5.2 | 4.9 | 4.6 | 5.3 | 5.2 | 6.2 | 6.9 | 6.2 |
| TUPELO, MS | 15 | 7.7 | 8.3 | 8.5 | 7.8 | 6.7 | 5.7 | 5.6 | 5.2 | 6.0 | 6.1 | 7.2 | 7.5 | 6.9 |
| Data through 1998 | Years | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| COLUMBIA, MO | 28 | 10.8 | 10.8 | 11.9 | 11.5 | 9.1 | 8.7 | 8.2 | 7.9 | 8.6 | 9.4 | 10.6 | 10.6 | 9.8 |
| KANSAS CITY, MO | 26 | 11.2 | 11.1 | 12.5 | 12.3 | 10.3 | 9.9 | 9.2 | 8.8 | 9.5 | 10.6 | 11.4 | 10.9 | 10.6 |
| ST. LOUIS, MO | 49 | 10.6 | 10.8 | 11.7 | 11.3 | 9.4 | 8.8 | 8.0 | 7.6 | 8.2 | 8.9 | 10.2 | 10.3 | 9.7 |
| SPRINGFIELD, MO | 53 | 11.5 | 11.5 | 12.6 | 12.0 | 10.2 | 9.3 | 8.4 | 8.4 | 9.2 | 10.1 | 11.1 | 11.2 | 10.5 |
| BILLINGS, MT | 59 | 13.0 | 12.2 | 11.4 | 11.4 | 10.7 | 10.1 | 9.5 | 9.5 | 10.2 | 11.0 | 12.1 | 13.0 | 11.2 |
| GLASGOW, MT | 29 | 9.9 | 10.1 | 11.2 | 12.3 | 12.0 | 11.1 | 10.5 | 10.9 | 10.9 | 10.6 | 9.5 | 9.8 | 10.7 |
| GREAT FALLS, MT | 57 | 14.9 | 14.0 | 12.8 | 12.6 | 11.3 | 11.1 | 10.0 | 10.1 | 11.2 | 13.0 | 14.5 | 15.4 | 12.6 |
| HELENA, MT | 58 | 6.7 | 7.3 | 8.2 | 9.1 | 8.8 | 8.5 | 7.8 | 7.4 | 7.4 | 7.1 | 7.1 | 6.7 | 7.7 |
| KALISPELL, MT | 36 | 5.7 | 5.8 | 6.8 | 7.8 | 7.4 | 6.9 | 6.3 | 6.3 | 6.1 | 5.1 | 5.5 | 5.3 | 6.2 |
| MISSOULA, MT | 54 | 5.1 | 5.6 | 6.7 | 7.6 | 7.4 | 7.2 | 6.9 | 6.7 | 6.0 | 5.1 | 5.1 | 4.8 | 6.2 |
| GRAND ISLAND, NE | 49 | 11.7 | 11.7 | 13.3 | 14.0 | 12.6 | 11.8 | 10.5 | 10.3 | 11.0 | 11.2 | 11.8 | 11.6 | 11.8 |
| LINCOLN, NE | 26 | 9.6 | 10.0 | 11.5 | 12.1 | 10.4 | 9.7 | 9.3 | 9.1 | 9.5 | 9.9 | 10.1 | 9.7 | 10.1 |
| NORFOLK, NE | 22 | 11.9 | 11.5 | 12.8 | 13.1 | 11.5 | 10.7 | 9.7 | 9.6 | 10.4 | 11.1 | 11.6 | 11.5 | 11.3 |
| NORTH PLATTE, NE | 46 | 9.2 | 9.8 | 11.6 | 12.6 | 11.5 | 10.4 | 9.5 | 9.2 | 9.7 | 9.6 | 9.6 | 9.1 | 10.1 |
| OMAHA EPPLEY AP, NE | 62 | 10.9 | 11.1 | 12.3 | 12.6 | 10.9 | 10.1 | 8.8 | 8.8 | 9.4 | 9.8 | 10.9 | 10.7 | 10.5 |
| OMAHA (NORTH), NE | 9 | 9.9 | 9.2 | 10.5 | 10.2 | 8.9 | 8.3 | 7.5 | 7.6 | 8.6 | 9.0 | 9.7 | 9.8 | 9.1 |
| SCOTTSBLUFF, NE | 47 | 10.6 | 11.1 | 12.2 | 12.5 | 11.8 | 10.5 | 9.3 | 8.9 | 9.4 | 9.7 | 10.3 | 10.4 | 10.6 |
| VALENTINE, NE | 30 | 9.3 | 9.2 | 10.4 | 11.1 | 10.9 | 9.8 | 9.0 | 9.1 | 9.6 | 9.5 | 9.6 | 9.2 | 9.7 |
| ELKO, NV | 45 | 5.2 | 5.7 | 6.6 | 7.2 | 6.8 | 6.7 | 6.2 | 5.9 | 5.4 | 5.0 | 5.1 | 5.0 | 5.9 |
| ELY, NV | 57 | 10.1 | 10.3 | 10.7 | 10.9 | 10.7 | 10.6 | 10.3 | 10.4 | 10.3 | 10.0 | 9.9 | 9.9 | 10.3 |
| LAS VEGAS, NV | 50 | 7.4 | 8.5 | 10.2 | 11.0 | 11.1 | 11.1 | 10.3 | 9.6 | 9.0 | 8.1 | 7.8 | 7.3 | 9.3 |
| RENO, NV | 56 | 5.6 | 6.2 | 7.8 | 8.2 | 8.0 | 7.7 | 7.2 | 6.6 | 5.8 | 5.4 | 5.5 | 5.3 | 6.6 |
| WINNEMUCCA, NV | 42 | 7.6 | 8.0 | 8.6 | 8.6 | 8.6 | 8.5 | 8.4 | 7.8 | 7.6 | 7.3 | 7.3 | 7.4 | 8.0 |
| CONCORD, NH | 56 | 7.3 | 7.9 | 8.1 | 7.8 | 7.0 | 6.5 | 5.7 | 5.4 | 5.6 | 6.0 | 6.6 | 7.0 | 6.7 |
| MT. WASHINGTON, NH | 63 | 46.3 | 44.4 | 41.5 | 36.1 | 29.9 | 27.6 | 25.5 | 25.0 | 29.1 | 33.9 | 39.6 | 44.7 | 35.3 |
| ATLANTIC CITY AP, NJ | 40 | 10.9 | 11.3 | 11.8 | 11.5 | 10.1 | 9.1 | 8.3 | 7.9 | 8.3 | 8.8 | 10.1 | 10.3 | 9.9 |
| NEWARK, NJ | 54 | 11.2 | 11.5 | 11.9 | 11.2 | 10.0 | 9.5 | 8.9 | 8.7 | 9.0 | 9.4 | 10.2 | 10.8 | 10.2 |
| ALBUQUERQUE, NM | 59 | 8.0 | 8.8 | 9.9 | 10.7 | 10.5 | 9.8 | 8.9 | 8.1 | 8.4 | 8.2 | 7.9 | 7.6 | 8.9 |
| CLAYTON, NM | 6 | 11.8 | 11.8 | 13.0 | 14.1 | 12.7 | 12.5 | 11.0 | 9.7 | 11.1 | 11.8 | 12.0 | 12.1 | 12.0 |
| ROSWELL, NM | 25 | 7.7 | 8.6 | 10.1 | 10.2 | 9.9 | 9.6 | 8.7 | 7.9 | 8.0 | 7.9 | 7.8 | 7.6 | 8.7 |
| ALBANY, NY | 60 | 9.8 | 10.1 | 10.6 | 10.5 | 9.0 | 8.3 | 7.5 | 7.0 | 7.4 | 8.0 | 9.1 | 9.3 | 8.9 |
| BINGHAMTON, NY | 47 | 11.4 | 11.4 | 11.5 | 11.3 | 9.9 | 9.3 | 8.4 | 8.2 | 8.8 | 9.7 | 10.8 | 11.1 | 10.2 |
| BUFFALO, NY | 59 | 14.0 | 13.4 | 13.1 | 12.5 | 11.4 | 10.8 | 10.3 | 9.7 | 10.2 | 11.1 | 12.6 | 13.1 | 11.9 |
| ISLIP, NY | 15 | 9.6 | 10.1 | 10.3 | 9.8 | 8.8 | 8.3 | 7.5 | 7.3 | 7.7 | 8.2 | 9.3 | 9.2 | 8.8 |
| NEW YORK C.PARK, NY | 61 | 10.7 | 10.8 | 11.0 | 10.4 | 8.8 | 8.1 | 7.6 | 7.5 | 8.1 | 8.8 | 9.8 | 10.1 | 9.3 |
| NEW YORK (JFK AP), NY | 40 | 13.1 | 13.3 | 13.4 | 12.8 | 11.6 | 10.7 | 10.2 | 10.0 | 10.4 | 11.0 | 12.2 | 12.7 | 11.8 |
| NEW YORK (LAGUARDIA AP), NY | 50 | 13.8 | 13.9 | 13.9 | 13.0 | 11.6 | 11.0 | 10.4 | 10.3 | 11.0 | 11.6 | 12.8 | 13.4 | 12.2 |
| ROCHESTER, NY | 58 | 11.6 | 11.1 | 11.0 | 10.7 | 9.3 | 8.6 | 8.0 | 7.7 | 8.1 | 8.8 | 10.2 | 10.7 | 9.6 |
| SYRACUSE, NY | 49 | 10.6 | 10.6 | 10.7 | 10.4 | 9.0 | 8.3 | 7.9 | 7.6 | 8.2 | 8.7 | 10.2 | 10.3 | 9.4 |
| ASHEVILLE, NC | 34 | 9.4 | 9.4 | 9.3 | 8.7 | 7.0 | 5.8 | 5.8 | 5.3 | 5.5 | 6.6 | 8.0 | 8.7 | 7.5 |
| CAPE HATTERAS, NC | 40 | 11.9 | 12.0 | 11.9 | 11.7 | 10.7 | 10.6 | 10.0 | 9.5 | 10.4 | 11.0 | 10.8 | 11.3 | 11.0 |
| CHARLOTTE, NC | 49 | 7.8 | 8.3 | 8.8 | 8.7 | 7.5 | 6.9 | 6.6 | 6.4 | 6.6 | 6.7 | 6.9 | 7.4 | 7.4 |
| GREENSBORO - WNSTN-SALM, NC | 70 | 8.1 | 8.5 | 9.1 | 8.8 | 7.6 | 6.9 | 6.5 | 6.2 | 6.6 | 7.0 | 7.5 | 7.6 | 7.5 |
| RALEIGH, NC | 49 | 8.4 | 8.7 | 9.3 | 8.8 | 7.7 | 7.0 | 6.7 | 6.3 | 6.7 | 6.9 | 7.4 | 7.8 | 7.6 |
| WILMINGTON, NC | 47 | 9.0 | 9.6 | 10.0 | 10.1 | 9.1 | 8.4 | 7.9 | 7.3 | 7.8 | 7.9 | 8.1 | 8.4 | 8.6 |
| BISMARCK, ND | 59 | 10.0 | 9.9 | 10.9 | 11.9 | 11.6 | 10.4 | 9.2 | 9.4 | 9.9 | 10.0 | 10.0 | 9.5 | 10.2 |
| FARGO, ND | 56 | 12.6 | 12.4 | 13.1 | 13.6 | 12.9 | 11.6 | 10.5 | 11.0 | 11.8 | 12.5 | 12.8 | 12.2 | 12.2 |
| WILLISTON, ND | 34 | 9.6 | 9.8 | 10.2 | 11.1 | 11.1 | 10.3 | 9.3 | 9.5 | 9.8 | 10.0 | 9.1 | 9.5 | 9.9 |
| AKRON, OH | 50 | 11.6 | 11.1 | 11.4 | 10.8 | 9.1 | 8.4 | 7.6 | 7.3 | 8.0 | 9.1 | 10.8 | 11.3 | 9.7 |
| CLEVELAND, OH | 57 | 12.2 | 11.8 | 12.0 | 11.5 | 10.0 | 9.2 | 8.6 | 8.2 | 8.9 | 9.9 | 11.8 | 12.0 | 10.5 |
| COLUMBUS, OH | 49 | 9.8 | 9.6 | 10.1 | 9.6 | 8.1 | 7.2 | 6.5 | 6.2 | 6.4 | 7.3 | 9.1 | 9.4 | 8.3 |
| DAYTON, OH | 55 | 11.4 | 11.3 | 11.7 | 11.3 | 9.7 | 8.8 | 7.9 | 7.3 | 8.1 | 9.0 | 11.0 | 11.1 | 9.9 |
| MANSFIELD, OH | 14 | 13.1 | 12.2 | 12.2 | 11.9 | 10.1 | 9.5 | 8.2 | 8.1 | 8.7 | 10.2 | 11.3 | 12.1 | 10.6 |
| TOLEDO, OH | 43 | 11.0 | 10.5 | 11.0 | 10.9 | 9.5 | 8.4 | 7.5 | 7.1 | 7.7 | 8.8 | 10.2 | 10.4 | 9.4 |
| YOUNGSTOWN, OH | 49 | 11.4 | 11.1 | 11.3 | 10.8 | 9.4 | 8.4 | 7.7 | 7.4 | 8.1 | 9.2 | 10.8 | 11.1 | 9.7 |
| OKLAHOMA CITY, OK | 50 | 12.6 | 13.1 | 14.4 | 14.2 | 12.5 | 11.8 | 10.9 | 10.4 | 10.8 | 11.8 | 12.4 | 12.3 | 12.3 |
| TULSA, OK | 50 | 10.3 | 10.7 | 12.0 | 11.9 | 10.6 | 9.9 | 9.3 | 8.9 | 9.1 | 9.6 | 10.4 | 10.1 | 10.2 |
| ASTORIA, OR | 45 | 9.2 | 9.0 | 8.8 | 8.7 | 8.5 | 8.6 | 8.7 | 8.0 | 7.5 | 7.5 | 8.6 | 9.1 | 8.5 |
| EUGENE, OR | 46 | 7.9 | 7.8 | 8.2 | 7.7 | 7.4 | 7.6 | 8.0 | 7.6 | 7.4 | 6.7 | 7.4 | 7.6 | 7.6 |
| MEDFORD, OR | 49 | 4.1 | 4.5 | 5.2 | 5.6 | 5.7 | 5.9 | 5.8 | 5.3 | 4.5 | 3.7 | 3.6 | 3.7 | 4.8 |
| PENDLETON, OR | 45 | 7.7 | 8.1 | 9.1 | 9.8 | 9.5 | 9.5 | 9.0 | 8.6 | 8.3 | 7.6 | 7.8 | 7.8 | 8.6 |
| PORTLAND, OR | 50 | 10.0 | 9.2 | 8.3 | 7.4 | 7.1 | 7.2 | 7.6 | 7.1 | 6.5 | 6.5 | 8.6 | 9.6 | 7.9 |
| SALEM, OR | 50 | 8.0 | 7.7 | 7.8 | 7.2 | 6.7 | 6.6 | 6.7 | 6.3 | 6.1 | 6.0 | 7.5 | 7.9 | 7.0 |
| SEXTON SUMMIT, OR | 6 | 12.8 | 12.5 | 11.7 | 10.6 | 10.2 | 11.1 | 11.8 | 10.9 | 11.1 | 11.9 | 14.1 | 13.3 | 11.8 |
| GUAM, PC | 9 | 9.4 | 11.2 | 10.3 | 10.8 | 9.8 | 8.3 | 6.7 | 6.5 | 6.3 | 7.3 | 9.5 | 10.7 | 8.9 |
| JOHNSTON ISLAND, PC | 23 | 14.4 | 15.8 | 16.9 | 16.7 | 15.9 | 16.1 | 16.0 | 15.4 | 14.4 | 15.0 | 16.0 | 16.9 | 15.8 |
| KOROR, PC | 33 | 8.0 | 8.2 | 8.0 | 7.1 | 6.3 | 5.9 | 6.3 | 6.7 | 6.8 | 6.8 | 6.2 | 7.0 | 6.9 |
| KWAJALEIN, MARSHALL IS., PC | 32 | 16.7 | 16.3 | 16.1 | 14.8 | 13.8 | 12.9 | 11.1 | 9.7 | 9.3 | 9.9 | 12.0 | 16.3 | 13.2 |
| MAJURO, MARSHALL IS, PC | 34 | 12.8 | 13.2 | 12.9 | 12.1 | 11.2 | 10.0 | 8.4 | 7.3 | 7.1 | 7.4 | 8.7 | 12.0 | 10.3 |
| PAGO PAGO, AMER SAMOA, PC | 31 | 9.4 | 9.2 | 8.9 | 8.9 | 10.7 | 12.7 | 13.3 | 13.2 | 12.6 | 12.2 | 10.9 | 9.7 | 11.0 |
| POHNPEI, CAROLINE IS., PC | 24 | 8.1 | 8.6 | 7.7 | 6.9 | 6.5 | 5.7 | 5.0 | 4.6 | 4.9 | 4.8 | 5.4 | 7.2 | 6.3 |
| CHUUK, E. CAROLINE IS., PC | 33 | 10.9 | 11.3 | 10.9 | 9.9 | 8.8 | 7.4 | 7.3 | 7.5 | 7.8 | 7.8 | 8.1 | 9.7 | 8.9 |
| WAKE ISLAND, PC | 43 | 13.6 | 13.5 | 14.5 | 15.6 | 14.3 | 12.6 | 12.6 | 12.0 | 12.4 | 14.0 | 16.0 | 14.9 | 13.8 |
| YAP, W CAROLINE IS., PC | 29 | 9.7 | 10.3 | 9.9 | 8.9 | 7.9 | 6.9 | 6.5 | 6.7 | 6.9 | 6.4 | 7.4 | 8.9 | 8.0 |
| Data through 1998 | Years | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ALLENTOWN, PA | 49 | 10.4 | 10.8 | 11.2 | 10.6 | 9.0 | 8.2 | 7.2 | 6.8 | 7.3 | 8.0 | 9.3 | 9.6 | 9.0 |
| ERIE, PA. | 44 | 13.2 | 12.0 | 12.0 | 11.3 | 9.9 | 9.6 | 9.0 | 9.0 | 9.9 | 11.2 | 12.8 | 13.0 | 11.1 |
| HARRISBURG, PA | 49 | 8.2 | 9.0 | 9.5 | 9.1 | 7.6 | 6.8 | 6.2 | 5.8 | 6.0 | 6.6 | 7.8 | 8.0 | 7.5 |
| MIDDLETOWN / HARRISBURG, PA | 56 | 8.5 | 9.1 | 9.7 | 9.3 | 7.8 | 6.9 | 6.3 | 5.9 | 6.1 | 6.6 | 7.9 | 8.1 | 7.7 |
| PHILADELPHIA, PA | 58 | 10.3 | 10.9 | 11.3 | 10.8 | 9.5 | 8.8 | 8.2 | 8.0 | 8.3 | 8.8 | 9.6 | 10.0 | 9.5 |
| PITTSBURGH, PA | 46 | 10.5 | 10.4 | 10.6 | 10.2 | 8.8 | 8.0 | 7.3 | 6.8 | 7.4 | 8.4 | 9.8 | 10.1 | 9.0 |
| AVOCA, PA | 43 | 8.9 | 9.0 | 9.4 | 9.4 | 8.4 | 7.7 | 7.3 | 6.9 | 7.4 | 7.7 | 8.5 | 8.7 | 8.3 |
| WILLIAMSPORT, PA | 36 | 8.9 | 8.8 | 9.1 | 9.1 | 7.8 | 6.9 | 6.4 | 5.9 | 6.1 | 6.7 | 8.0 | 8.4 | 7.7 |
| BLOCK IS.,RI | 6 | 12.6 | 12.1 | 11.8 | 10.9 | 10.2 | 9.9 | 9.6 | 8.1 | 8.0 | 9.3 | 12.6 | 11.8 | 10.6 |
| PROVIDENCE, RI | 45 | 11.1 | 11.4 | 11.9 | 11.9 | 10.7 | 9.9 | 9.4 | 9.2 | 9.3 | 9.5 | 10.3 | 10.6 | 10.4 |
| CHARLESTON AP,SC | 49 | 9.1 | 9.8 | 10.0 | 9.7 | 8.6 | 8.3 | 7.8 | 7.4 | 7.7 | 8.0 | 8.1 | 8.5 | 8.6 |
| COLUMBIA, SC | 50 | 7.2 | 7.7 | 8.2 | 8.2 | 7.0 | 6.6 | 6.3 | 5.8 | 6.0 | 6.1 | 6.3 | 6.7 | 6.8 |
| GREENVILLE - SPARTANBRG, SC | 36 | 7.6 | 8.0 | 8.3 | 8.0 | 7.0 | 6.5 | 6.1 | 5.7 | 6.2 | 6.6 | 6.9 | 7.5 | 7.0 |
| ABERDEEN, SD | 22 | 11.1 | 11.2 | 12.2 | 12.7 | 12.2 | 10.5 | 9.4 | 9.9 | 10.4 | 11.0 | 11.0 | 10.6 | 11.0 |
| HURON, SD | 59 | 11.4 | 11.3 | 12.4 | 13.2 | 12.3 | 11.2 | 10.3 | 10.4 | 11.1 | 11.3 | 11.7 | 11.1 | 11.5 |
| RAPID CITY, SD | 48 | 10.7 | 11.1 | 12.6 | 13.1 | 12.2 | 10.9 | 10.1 | 10.2 | 11.0 | 11.2 | 10.8 | 10.5 | 11.2 |
| SIOUX FALLS, SD | 50 | 10.9 | 11.1 | 12.4 | 12.9 | 11.8 | 10.7 | 9.8 | 9.8 | 10.3 | 10.7 | 11.5 | 10.7 | 11.1 |
| BRISTOL - JOHNSON CITY,TN | 44 | 6.4 | 6.6 | 7.2 | 6.9 | 5.3 | 4.7 | 4.3 | 3.9 | 4.3 | 4.6 | 5.5 | 5.8 | 5.5 |
| CHATTANOOGA, TN | 58 | 6.9 | 7.3 | 7.7 | 7.3 | 5.9 | 5.3 | 5.0 | 4.6 | 4.9 | 4.9 | 6.0 | 6.4 | 6.0 |
| KNOXVILLE, TN | 56 | 7.7 | 8.0 | 8.4 | 8.4 | 6.8 | 6.3 | 6.0 | 5.5 | 5.6 | 5.7 | 6.7 | 7.2 | 6.9 |
| MEMPHIS, TN | 50 | 10.0 | 10.1 | 10.7 | 10.2 | 8.8 | 7.9 | 7.5 | 6.9 | 7.5 | 7.7 | 9.1 | 9.7 | 8.8 |
| NASHVILLE, TN | 57 | 9.1 | 9.3 | 9.9 | 9.2 | 7.6 | 7.0 | 6.5 | 6.2 | 6.5 | 6.8 | 8.4 | 8.9 | 8.0 |
| OAK RIDGE,TN | 19 | 4.6 | 4.7 | 5.0 | 5.4 | 4.2 | 3.9 | 3.6 | 3.3 | 3.4 | 3.2 | 3.8 | 4.2 | 4.1 |
| ABILENE, TX | 54 | 11.7 | 12.5 | 13.8 | 13.8 | 13.0 | 12.4 | 10.8 | 10.1 | 10.3 | 11.0 | 11.6 | 11.7 | 11.9 |
| AMARILLO, TX | 57 | 12.8 | 13.8 | 15.3 | 15.2 | 14.5 | 14.2 | 12.7 | 12.0 | 12.8 | 12.8 | 13.0 | 12.7 | 13.5 |
| AUSTIN, TX | 57 | 9.6 | 10.0 | 10.6 | 10.3 | 9.5 | 9.0 | 8.3 | 7.8 | 7.8 | 8.0 | 9.0 | 9.1 | 9.1 |
| BROWNSVILLE, TX | 56 | 11.1 | 11.9 | 13.2 | 13.6 | 12.9 | 12.0 | 11.3 | 10.2 | 9.3 | 9.4 | 10.6 | 10.6 | 11.3 |
| CORPUS CHRISTI, TX | 56 | 12.0 | 12.9 | 14.0 | 14.3 | 12.8 | 11.7 | 11.6 | 11.0 | 10.4 | 10.4 | 11.7 | 11.6 | 12.0 |
| DALLAS - FORT WORTH, TX | 45 | 11.0 | 11.7 | 12.7 | 12.4 | 11.1 | 10.6 | 9.8 | 8.9 | 9.3 | 9.7 | 10.7 | 10.8 | 10.7 |
| DEL RIO, TX | 19 | 8.6 | 9.5 | 10.8 | 10.9 | 10.7 | 11.3 | 10.8 | 10.0 | 9.0 | 8.9 | 8.3 | 8.2 | 9.8 |
| EL PASO, TX | 56 | 8.3 | 9.1 | 10.9 | 11.0 | 10.3 | 9.3 | 8.3 | 7.7 | 7.6 | 7.5 | 8.0 | 7.9 | 8.8 |
| GALVESTON, TX | 93 | 11.6 | 11.8 | 11.9 | 12.1 | 11.5 | 10.7 | 9.8 | 9.4 | 10.1 | 10.3 | 11.2 | 11.3 | 11.0 |
| HOUSTON, TX | 29 | 8.2 | 8.7 | 9.2 | 9.1 | 8.1 | 7.5 | 6.9 | 6.2 | 6.6 | 7.0 | 7.8 | 7.7 | 7.8 |
| LUBBOCK, TX | 49 | 12.0 | 13.2 | 14.7 | 14.7 | 14.2 | 13.6 | 11.4 | 10.1 | 10.5 | 11.2 | 11.7 | 11.8 | 12.4 |
| MIDLAND - ODESSA, TX | 45 | 10.4 | 11.2 | 12.6 | 12.8 | 12.5 | 12.3 | 10.8 | 10.1 | 10.1 | 10.1 | 10.4 | 10.1 | 11.1 |
| PORT ARTHUR, TX | 45 | 10.7 | 11.2 | 11.6 | 11.6 | 10.1 | 8.7 | 7.4 | 7.1 | 8.2 | 8.8 | 10.1 | 10.3 | 9.6 |
| SAN ANGELO, TX | 49 | 10.2 | 10.8 | 12.1 | 12.1 | 11.1 | 10.8 | 9.8 | 9.0 | 8.9 | 9.3 | 10.0 | 9.9 | 10.3 |
| SAN ANTONIO, TX | 56 | 8.8 | 9.3 | 10.1 | 10.1 | 9.8 | 9.7 | 9.1 | 8.4 | 8.3 | 8.3 | 8.6 | 8.4 | 9.1 |
| VICTORIA, TX | 37 | 10.4 | 10.9 | 11.5 | 11.7 | 10.7 | 9.7 | 8.9 | 8.3 | 8.5 | 8.9 | 9.7 | 10.1 | 9.9 |
| WACO, TX | 49 | 11.4 | 11.7 | 12.8 | 12.6 | 11.6 | 11.1 | 10.7 | 9.8 | 9.6 | 10.0 | 10.9 | 10.9 | 11.1 |
| WICHITA FALLS, TX | 50 | 11.3 | 11.9 | 13.2 | 13.1 | 12.2 | 12.1 | 11.1 | 10.3 | 10.4 | 10.7 | 11.4 | 11.1 | 11.6 |
| SALT LAKE CITY, UT | 69 | 7.5 | 8.1 | 9.3 | 9.6 | 9.4 | 9.4 | 9.5 | 9.7 | 9.1 | 8.5 | 8.0 | 7.6 | 8.8 |
| BURLINGTON, VT | 55 | 9.8 | 9.4 | 9.4 | 9.5 | 9.0 | 8.5 | 8.0 | 7.7 | 8.3 | 8.8 | 9.7 | 9.9 | 9.0 |
| LYNCHBURG, VA | 31 | 8.4 | 8.4 | 8.9 | 8.8 | 7.4 | 6.7 | 6.3 | 6.0 | 6.6 | 6.9 | 7.6 | 7.5 | 7.5 |
| NORFOLK, VA | 50 | 11.5 | 11.9 | 12.4 | 11.8 | 10.4 | 9.7 | 8.9 | 8.8 | 9.6 | 10.2 | 10.4 | 11.0 | 10.6 |
| RICHMOND, VA | 50 | 8.1 | 8.6 | 9.1 | 9.0 | 7.9 | 7.4 | 6.9 | 6.5 | 6.7 | 7.0 | 7.6 | 7.8 | 7.7 |
| ROANOKE, VA | 50 | 9.3 | 9.5 | 10.0 | 9.6 | 7.8 | 6.8 | 6.5 | 6.1 | 6.0 | 6.8 | 8.2 | 8.6 | 7.9 |
| OLYMPIA, WA | 45 | 7.1 | 7.1 | 7.2 | 7.3 | 6.9 | 6.7 | 6.2 | 6.0 | 5.7 | 5.8 | 6.9 | 7.2 | 6.7 |
| QUILLAYUTE, WA | 32 | 6.7 | 6.7 | 6.6 | 6.2 | 6.0 | 5.8 | 5.5 | 5.1 | 4.9 | 5.4 | 6.4 | 6.6 | 6.0 |
| SEATTLE SEA-TAC AP, WA | 50 | 9.6 | 9.5 | 9.5 | 9.4 | 8.9 | 8.7 | 8.2 | 7.8 | 8.1 | 8.5 | 9.3 | 9.6 | 8.9 |
| SPOKANE, WA | 51 | 8.8 | 9.2 | 9.7 | 10.0 | 9.2 | 9.3 | 8.6 | 8.3 | 8.2 | 8.2 | 8.7 | 8.8 | 8.9 |
| YAKIMA, WA | 44 | 5.6 | 6.4 | 7.9 | 8.6 | 8.5 | 8.2 | 7.8 | 7.4 | 7.3 | 6.6 | 5.8 | 5.1 | 7.1 |
| SAN JUAN, PR | 43 | 8.4 | 8.7 | 9.1 | 8.9 | 8.4 | 9.0 | 9.7 | 8.9 | 7.6 | 6.7 | 7.4 | 8.0 | 8.4 |
| BECKLEY, WV | 34 | 10.1 | 10.0 | 10.5 | 10.1 | 8.5 | 7.3 | 6.6 | 6.2 | 6.9 | 8.0 | 9.3 | 9.8 | 8.6 |
| CHARLESTON, WV | 51 | 7.1 | 7.0 | 7.8 | 7.2 | 5.8 | 5.2 | 4.8 | 4.3 | 4.6 | 4.8 | 6.2 | 6.5 | 5.9 |
| ELKINS, WV | 27 | 7.2 | 7.8 | 8.1 | 7.7 | 6.5 | 4.7 | 4.1 | 3.9 | 4.2 | 4.7 | 6.6 | 6.6 | 6.0 |
| HUNTINGTON, WV | 36 | 7.5 | 7.6 | 8.0 | 7.7 | 6.2 | 5.7 | 5.3 | 5.1 | 5.3 | 5.8 | 6.9 | 7.3 | 6.5 |
| GREEN BAY, WI | 49 | 10.8 | 10.5 | 10.7 | 11.2 | 10.0 | 9.1 | 8.2 | 7.9 | 8.9 | 9.8 | 10.8 | 10.3 | 9.9 |
| LA CROSSE, WI | 46 | 8.7 | 8.7 | 9.3 | 10.4 | 9.4 | 8.4 | 7.6 | 7.5 | 8.2 | 9.3 | 9.8 | 8.9 | 8.9 |
| MADISON, WI | 52 | 10.4 | 10.3 | 11.1 | 11.3 | 10.0 | 9.0 | 8.0 | 7.9 | 8.5 | 9.6 | 10.6 | 10.0 | 9.7 |
| MILWAUKEE, WI | 58 | 12.6 | 12.3 | 12.8 | 12.8 | 11.5 | 10.4 | 9.7 | 9.5 | 10.4 | 11.4 | 12.5 | 12.2 | 11.5 |
| CASPER, WY | 48 | 16.2 | 14.8 | 13.7 | 12.5 | 11.6 | 10.9 | 10.1 | 10.3 | 10.9 | 11.9 | 14.4 | 16.0 | 12.8 |
| CHEYENNE, WY | 41 | 15.3 | 14.6 | 14.5 | 14.1 | 12.6 | 11.4 | 10.4 | 10.4 | 11.2 | 12.3 | 13.6 | 14.7 | 12.9 |
| LANDER, WY | 52 | 5.9 | 5.9 | 7.0 | 7.8 | 7.8 | 7.8 | 7.5 | 7.4 | 6.9 | 6.0 | 5.6 | 5.6 | 6.8 |
| SHERIDAN, WY | 55 | 7.7 | 7.8 | 8.9 | 9.8 | 9.0 | 8.1 | 7.3 | 7.4 | 7.5 | 7.5 | 7.7 | 7.6 | 8.0 |
The average wind speed is based on the speed of the wind regardless of direction.
Last Updated on 5/26/2000
By NRCC