| Data through 1998 | Years | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | |||
| BIRMINGHAM AP,AL | 35 | W | 49 | SE | 59 | SW | 65 | SW | 56 | NW | 65 | SW | 56 | SW | 57 | NW | 50 | SE | 50 | W | 43 | N | 52 | SE | 41 | SW | 65 | |
| HUNTSVILLE, AL | 31 | 26 | 44 | 8 | 43 | 12 | 46 | 18 | 44 | 24 | 46 | 24 | 56 | 23 | 49 | 2 | 63 | 23 | 43 | 1 | 43 | 27 | 40 | 30 | 40 | 2 | 63 | |
| MOBILE, AL | 40 | 18 | 44 | 23 | 46 | 10 | 40 | 1 | 44 | 32 | 51 | 22 | 44 | 21 | 60 | 14 | 63 | 9 | 63 | 36 | 46 | 36 | 37 | 32 | 38 | 14 | 63 | |
| MONTGOMERY, AL | 13 | 28 | 31 | 26 | 38 | 24 | 35 | 32 | 39 | 36 | 35 | 29 | 44 | 26 | 35 | 20 | 40 | 8 | 34 | 8 | 52 | 30 | 39 | 30 | 34 | 8 | 52 | |
| ANCHORAGE, AK | G | 19 | E | 64 | NE | 61 | NE | 75 | SE | 43 | S | 43 | SE | 46 | SE | 40 | N | 44 | S | 48 | S | 55 | NE | 55 | SE | 55 | NE | 75 |
| ANNETTE, AK | 46 | 16 | 58 | 16 | 50 | 14 | 48 | 14 | 60 | 14 | 44 | 16 | 44 | 16 | 35 | 16 | 40 | 11 | 51 | 16 | 55 | 13 | 51 | 16 | 58 | 14 | 60 | |
| BARROW, AK | G | 18 | E | 58 | SW | 74 | E | 56 | NE | 47 | NE | 41 | W | 43 | W | 55 | W | 47 | SW | 66 | W | 54 | E | 53 | SW | 61 | SW | 74 |
| BARTER IS.,AK | G | 9 | W | 75 | W | 69 | W | 66 | E | 49 | W | 56 | E | 53 | W | 48 | NW | 58 | E | 58 | W | 69 | E | 61 | W | 70 | W | 75 |
| BETHEL, AK | G | 19 | S | 61 | NE | 59 | S | 56 | S | 51 | S | 53 | S | 59 | S | 46 | NW | 56 | SE | 69 | S | 77 | W | 66 | S | 67 | S | 77 |
| BETTLES,AK | 6 | 11 | 30 | 8 | 25 | 8 | 29 | 36 | 26 | 11 | 31 | 1 | 28 | 24 | 28 | 25 | 32 | 24 | 25 | 24 | 25 | 26 | 38 | 24 | 40 | 24 | 40 | |
| BIG DELTA,AK | 25 | 29 | 74 | 18 | 60 | 20 | 63 | 18 | 60 | 20 | 55 | 16 | 51 | 18 | 63 | 16 | 47 | 18 | 66 | 18 | 58 | 11 | 56 | 11 | 63 | 29 | 74 | |
| COLD BAY,AK | 43 | 17 | 71 | 16 | 73 | 15 | 71 | 15 | 61 | 14 | 60 | 11 | 63 | 17 | 54 | 16 | 64 | 17 | 75 | 21 | 60 | 14 | 66 | 11 | 64 | 17 | 75 | |
| FAIRBANKS, AK | 47 | 25 | 31 | 26 | 36 | 22 | 40 | 24 | 32 | 23 | 32 | 25 | 40 | 27 | 32 | 27 | 34 | 8 | 33 | 25 | 40 | 25 | 35 | 24 | 37 | 22 | 40 | |
| GULKANA,AK | 5 | 4 | 52 | 19 | 35 | 15 | 35 | 18 | 46 | 17 | 29 | 15 | 38 | 15 | 40 | 16 | 30 | 4 | 31 | 19 | 46 | 19 | 33 | 17 | 40 | 4 | 52 | |
| HOMER, AK | 26 | 28 | 39 | 7 | 39 | 20 | 35 | 10 | 35 | 11 | 44 | 13 | 31 | 16 | 29 | 28 | 32 | 36 | 49 | 9 | 37 | 8 | 44 | 9 | 40 | 36 | 49 | |
| JUNEAU, AK | 28 | 12 | 40 | 13 | 44 | 11 | 40 | 11 | 40 | 12 | 40 | 12 | 35 | 12 | 32 | 12 | 38 | 12 | 48 | 12 | 49 | 11 | 58 | 11 | 55 | 11 | 58 | |
| KING SALMON, AK | G | 19 | E | 69 | E | 69 | E | 62 | S | 59 | S | 63 | E | 58 | E | 47 | SW | 56 | E | 71 | E | 67 | E | 67 | E | 66 | E | 71 |
| KODIAK, AK | G | 19 | NW | 75 | NW | 67 | NW | 82 | E | 67 | W | 59 | NE | 52 | NW | 52 | NW | 67 | NW | 78 | NW | 70 | W | 82 | NW | 83 | NW | 83 |
| KOTZEBUE, AK | G | 19 | E | 72 | E | 63 | E | 66 | NW | 47 | NE | 49 | SE | 46 | SE | 45 | S | 53 | NE | 54 | SE | 60 | SE | 63 | E | 68 | E | 72 |
| MCGRATH, AK | G | 19 | S | 59 | SW | 47 | SE | 46 | S | 46 | S | 45 | NW | 62 | S | 46 | S | 49 | S | 49 | E | 40 | S | 53 | SW | 52 | NW | 62 |
| NOME, AK | 41 | 9 | 54 | 4 | 51 | 2 | 44 | 5 | 45 | 9 | 44 | 4 | 35 | 24 | 35 | 15 | 41 | 18 | 44 | 20 | 52 | 24 | 55 | 5 | 54 | 24 | 55 | |
| ST. PAUL ISLAND, AK | G | 19 | 63 | N | 72 | N | 67 | SE | 67 | SW | 74 | S | 53 | SE | 47 | N | 58 | N | 61 | W | 70 | SW | 84 | E | 79 | SW | 84 | |
| TALKEETNA, AK | 31 | 4 | 38 | 3 | 35 | 3 | 39 | 34 | 29 | 18 | 32 | 19 | 25 | 17 | 22 | 2 | 26 | 19 | 25 | 3 | 31 | 2 | 31 | 36 | 35 | 3 | 39 | |
| UNALAKLEET, AK | G | 6 | E | 63 | E | 71 | E | 60 | E | 43 | E | 46 | E | 37 | SW | 39 | S | 44 | S | 45 | SE | 53 | E | 62 | E | 61 | E | 71 |
| VALDEZ, AK | G | 19 | N | 94 | NE | 83 | NE | 82 | N | 55 | N | 44 | W | 38 | N | 41 | N | 56 | SW | 69 | NE | 66 | N | 77 | N | 75 | N | 94 |
| YAKUTAT, AK | G | 19 | SE | 81 | SE | 62 | SE | 64 | SE | 64 | SE | 48 | SE | 45 | SE | 44 | SE | 60 | SE | 63 | SE | 60 | SE | 70 | SE | 63 | SE | 81 |
| FLAGSTAFF, AZ | 14 | SW | 38 | SW | 34 | SW | 37 | SW | 40 | SW | 46 | SW | 35 | NW | 39 | SW | 30 | W | 33 | NW | 34 | SW | 39 | NE | 38 | SW | 46 | |
| PHOENIX, AZ | 13 | 25 | 36 | 14 | 26 | 24 | 43 | 28 | 33 | 11 | 35 | 3 | 31 | 13 | 43 | 10 | 35 | 25 | 37 | 24 | 36 | 25 | 30 | 9 | 26 | 24 | 43 | |
| TUCSON, AZ | 50 | E | 40 | E | 59 | SE | 41 | SW | 46 | SE | 43 | SE | 50 | SE | 71 | NE | 54 | SE | 54 | SE | 47 | E | 55 | W | 44 | SE | 71 | |
| WINSLOW, AZ | 33 | 23 | 56 | 22 | 63 | 22 | 58 | 25 | 56 | 25 | 53 | 20 | 52 | 16 | 59 | 24 | 43 | 23 | 41 | 22 | 49 | 22 | 46 | 22 | 52 | 22 | 63 | |
| YUMA, AZ | 40 | NW | 41 | W | 50 | N | 43 | NW | 47 | NW | 38 | SW | 42 | NE | 61 | SE | 60 | E | 57 | S | 47 | N | 47 | W | 47 | NE | 61 | |
| FORT SMITH, AR | 16 | 28 | 40 | 24 | 36 | 26 | 41 | 26 | 45 | 28 | 47 | 28 | 57 | 9 | 51 | 9 | 46 | 30 | 41 | 28 | 38 | 26 | 40 | 22 | 44 | 28 | 57 | |
| LITTLE ROCK, AR | 37 | S | 44 | SW | 57 | SE | 56 | NW | 65 | NW | 61 | NE | 60 | NW | 56 | NW | 54 | NW | 50 | SSW | 58 | SW | 49 | SW | 48 | NW | 65 | |
| NORTH LITTLE ROCK, AR | 3 | NW | 25 | SW | 25 | S | 28 | NE | 30 | SW | 30 | NE | 21 | W | 30 | W | 28 | NE | 24 | SE | 24 | SW | 27 | SW | 25 | NE | 30 | |
| BAKERSFIELD, CA | 49 | 2 | 35 | 13 | 49 | 36 | 38 | 29 | 40 | 32 | 40 | 15 | 41 | 29 | 25 | 14 | 33 | 14 | 35 | 8 | 38 | 30 | 35 | 13 | 46 | 13 | 49 | |
| BISHOP, CA | G | 13 | 60 | W | 63 | 58 | 62 | 62 | 54 | 60 | 70 | 47 | 52 | 66 | 68 | 70 | ||||||||||||
| BLUE CANYON, CA | 29 | 20 | 67 | 17 | 76 | 7 | 67 | 20 | 50 | 23 | 37 | 7 | 49 | 9 | 32 | 7 | 30 | 9 | 49 | 5 | 70 | 19 | 54 | 7 | 51 | 17 | 76 | |
| EUREKA, CA. | 83 | S | 54 | SW | 48 | SW | 48 | N | 49 | NW | 40 | NW | 39 | N | 35 | N | 34 | N | 44 | SW | 56 | S | 55 | S | 56 | SW | 56 | |
| FRESNO, CA | 20 | 14 | 39 | 13 | 36 | 32 | 29 | 30 | 32 | 32 | 32 | 29 | 28 | 32 | 23 | 31 | 28 | 31 | 29 | 30 | 25 | 30 | 28 | 22 | 28 | 14 | 39 | |
| LONG BEACH, CA | 29 | 17 | 37 | 18 | 40 | 32 | 35 | 29 | 44 | 27 | 30 | 29 | 24 | 18 | 23 | 16 | 23 | 10 | 26 | 30 | 37 | 25 | 44 | 32 | 39 | 29 | 44 | |
| LOS ANGELES AP, CA | G | 48 | NE | 51 | N | 57 | W | 62 | N | 59 | W | 49 | W | 40 | SW | 31 | SE | 33 | E | 39 | W | 46 | W | 60 | NW | 49 | W | 62 |
| LOS ANGELES C.O., CA | 36 | N | 49 | NW | 40 | NW | 47 | NW | 40 | NW | 39 | N | 32 | W | 21 | E | 24 | NW | 27 | N | 48 | N | 42 | SE | 44 | N | 49 | |
| MOUNT SHASTA, CA | 6 | 34 | 23 | 36 | 22 | 35 | 21 | 34 | 24 | 32 | 21 | 31 | 18 | 36 | 20 | 34 | 15 | 35 | 20 | 30 | 17 | 34 | 20 | 32 | 21 | 34 | 24 | |
| REDDING, CA | G | 12 | S | 70 | S | 64 | S | 74 | S | 47 | S | 54 | N | 60 | N | 36 | S | 46 | 44 | S | 66 | S | 58 | S | 85 | S | 85 | |
| SACRAMENTO, CA | 49 | SE | 60 | SE | 51 | S | 66 | SW | 45 | SW | 74 | SW | 47 | SW | 36 | SW | 38 | NW | 42 | SE | 68 | SE | 70 | SE | 70 | SW | 74 | |
| SAN DIEGO, CA | 54 | SE | 56 | S | 45 | SW | 46 | S | 37 | S | 30 | S | 26 | NW | 23 | NW | 23 | S | 31 | N | 31 | SE | 51 | NW | 39 | SE | 56 | |
| SAN FRANCISCO AP, CA | 49 | 16 | 58 | 22 | 55 | 17 | 41 | 18 | 47 | 31 | 41 | 28 | 44 | 28 | 40 | 27 | 36 | 28 | 38 | 25 | 44 | 20 | 47 | 22 | 54 | 16 | 58 | |
| SAN FRANCISCO C.O., CA | 36 | SE | 47 | SW | 47 | S | 44 | W | 38 | W | 38 | W | 40 | W | 38 | W | 34 | W | 32 | SE | 43 | S | 41 | SE | 45 | SE | 47 | |
| SANTA MARIA, CA | 9 | 13 | 36 | 13 | 46 | 16 | 35 | 29 | 37 | 30 | 35 | 29 | 36 | 29 | 32 | 29 | 30 | 29 | 32 | 17 | 37 | 26 | 31 | 16 | 36 | 13 | 46 | |
| STOCKTON, CA | 35 | 14 | 46 | 16 | 41 | 33 | 39 | 24 | 35 | 35 | 35 | 29 | 35 | 23 | 29 | 26 | 30 | 34 | 33 | 33 | 37 | 13 | 40 | 15 | 44 | 14 | 46 | |
| ALAMOSA, CO | G | 15 | SW | 58 | 23 | 62 | 23 | 60 | 24 | 71 | 22 | 63 | 20 | 69 | 30 | 66 | 34 | 51 | SW | 54 | W | 62 | 21 | 63 | 26 | 54 | 24 | 71 |
| COLORADO SPRINGS, CO | 48 | 29 | 55 | 36 | 52 | 29 | 60 | 28 | 61 | 27 | 52 | 20 | 55 | 35 | 47 | 25 | 41 | 27 | 40 | 30 | 53 | 34 | 52 | 27 | 60 | 28 | 61 | |
| DENVER, CO | 14 | 32 | 44 | 30 | 36 | 30 | 41 | 33 | 46 | 36 | 43 | 21 | 38 | 29 | 46 | 33 | 33 | 29 | 36 | 1 | 36 | 36 | 36 | 32 | 38 | 33 | 46 | |
| GRAND JUNCTION, CO | 19 | 18 | 35 | 20 | 41 | 27 | 41 | 26 | 46 | 20 | 46 | 30 | 57 | 8 | 40 | 14 | 38 | 28 | 49 | 21 | 44 | 31 | 39 | 26 | 35 | 30 | 57 | |
| PUEBLO, CO | 14 | 29 | 51 | 29 | 46 | 36 | 52 | 35 | 52 | 35 | 60 | 29 | 48 | 25 | 43 | 31 | 46 | 1 | 46 | 30 | 47 | 4 | 48 | 27 | 43 | 35 | 60 | |
| BRIDGEPORT, CT | 38 | 34 | 67 | 34 | 65 | 8 | 58 | 32 | 55 | 34 | 50 | 29 | 38 | 29 | 40 | 4 | 58 | 18 | 74 | 9 | 58 | 14 | 58 | 25 | 53 | 18 | 74 | |
| HARTFORD, CT | 13 | 18 | 36 | 30 | 46 | 30 | 43 | 5 | 41 | 28 | 39 | 25 | 31 | 35 | 35 | 18 | 40 | 17 | 43 | 29 | 38 | 17 | 44 | 31 | 39 | 30 | 46 | |
| WILMINGTON, DE | 50 | 29 | 46 | 29 | 46 | 28 | 45 | 33 | 46 | 30 | 46 | 34 | 43 | 27 | 48 | 35 | 46 | 7 | 40 | 20 | 58 | 16 | 46 | 32 | 46 | 20 | 58 | |
| WASHINGTON DULLES AP, D.C. | 35 | 20 | 39 | 28 | 36 | 29 | 40 | 32 | 46 | 35 | 40 | 31 | 55 | 30 | 48 | 34 | 43 | 25 | 35 | 29 | 38 | 29 | 35 | 30 | 40 | 31 | 55 | |
| WASHINGTON NAT'L AP, D.C. | 13 | 29 | 35 | 4 | 38 | 33 | 40 | 35 | 37 | 32 | 46 | 31 | 46 | 31 | 43 | 34 | 37 | 12 | 38 | 23 | 39 | 32 | 37 | 34 | 38 | 31 | 46 | |
| Data through 1998 | Years | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | |||
| APALACHICOLA, FL | 47 | E | 48 | E | 42 | E | 54 | SE | 51 | SE | 47 | E | 55 | N | 63 | NE | 59 | E | 67 | NW | 56 | SE | 47 | SE | 42 | E | 67 | |
| DAYTONA BEACH, FL | 50 | 26 | 43 | 20 | 44 | 24 | 58 | 18 | 46 | 28 | 46 | 33 | 40 | 25 | 40 | 11 | 50 | 11 | 58 | 5 | 53 | 27 | 37 | 34 | 40 | 24 | 58 | |
| FORT MYERS, FL | 47 | 25 | 40 | 25 | 39 | 35 | 46 | 20 | 39 | 32 | 44 | 12 | 46 | 18 | 45 | 25 | 44 | 5 | 92 | 23 | 45 | 30 | 32 | 33 | 35 | 5 | 92 | |
| JACKSONVILLE, FL | 18 | 30 | 38 | 30 | 39 | 22 | 44 | 32 | 46 | 29 | 34 | 28 | 39 | 26 | 57 | 11 | 38 | 25 | 36 | 21 | 31 | 33 | 38 | 31 | 40 | 26 | 57 | |
| KEY WEST, FL | 22 | 27 | 41 | 12 | 57 | 22 | 54 | 1 | 58 | 13 | 46 | 18 | 40 | 12 | 33 | 19 | 41 | 12 | 43 | 35 | 46 | 12 | 47 | 26 | 39 | 1 | 58 | |
| MIAMI, FL | 41 | 24 | 46 | 19 | 55 | 4 | 46 | 24 | 35 | 32 | 52 | 13 | 37 | 25 | 43 | 12 | 86 | 6 | 69 | 5 | 41 | 7 | 38 | 32 | 38 | 12 | 86 | |
| ORLANDO, FL | 49 | 25 | 42 | 25 | 46 | 24 | 46 | 2 | 50 | 35 | 51 | 32 | 64 | 14 | 46 | 32 | 50 | 24 | 46 | 5 | 48 | 26 | 46 | 7 | 32 | 32 | 64 | |
| PENSACOLA, FL | 26 | 22 | 35 | 13 | 40 | 16 | 39 | 32 | 35 | 24 | 32 | 29 | 46 | 19 | 36 | 32 | 35 | 10 | 53 | 13 | 35 | 21 | 35 | 10 | 34 | 10 | 53 | |
| TALLAHASSEE, FL | 39 | 23 | 46 | 9 | 40 | 27 | 48 | 19 | 35 | 29 | 40 | 3 | 44 | 22 | 39 | 2 | 58 | 8 | 46 | 20 | 32 | 16 | 40 | 15 | 32 | 2 | 58 | |
| TAMPA, FL | 46 | 33 | 36 | 32 | 50 | 29 | 43 | 28 | 44 | 36 | 46 | 31 | 67 | 32 | 58 | 11 | 38 | 34 | 56 | 21 | 40 | 25 | 40 | 36 | 45 | 31 | 67 | |
| WEST PALM BEACH, FL | 49 | 29 | 48 | 11 | 48 | 27 | 51 | 32 | 55 | 27 | 45 | 9 | 71 | 34 | 46 | 13 | 86 | 36 | 58 | 16 | 74 | 10 | 39 | 36 | 38 | 13 | 86 | |
| ATHENS, GA | 43 | 25 | 52 | 20 | 52 | 24 | 50 | 23 | 47 | 31 | 35 | 18 | 43 | 13 | 35 | 35 | 47 | 15 | 37 | 5 | 35 | 24 | 41 | 29 | 43 | 25 | 52 | |
| ATLANTA, GA | 22 | 23 | 46 | 29 | 52 | 31 | 49 | 30 | 44 | 27 | 54 | 24 | 51 | 30 | 60 | 32 | 41 | 27 | 37 | 9 | 35 | 29 | 39 | 30 | 33 | 30 | 60 | |
| AUGUSTA,GA | 47 | 25 | 40 | 30 | 40 | 23 | 52 | 32 | 39 | 28 | 48 | 8 | 62 | 33 | 48 | 18 | 45 | 4 | 36 | 18 | 40 | 27 | 40 | 25 | 34 | 8 | 62 | |
| COLUMBUS, GA | 40 | 29 | 46 | 20 | 52 | 27 | 44 | 28 | 40 | 23 | 39 | 29 | 55 | 36 | 52 | 18 | 47 | 36 | 38 | 12 | 40 | 31 | 37 | 33 | 35 | 29 | 55 | |
| MACON, GA | 16 | 32 | 37 | 27 | 46 | 27 | 34 | 33 | 45 | 31 | 47 | 27 | 44 | 30 | 44 | 12 | 38 | 36 | 37 | 18 | 33 | 30 | 40 | 30 | 35 | 31 | 47 | |
| SAVANNAH, GA | 18 | 31 | 30 | 9 | 31 | 32 | 46 | 23 | 35 | 22 | 44 | 5 | 43 | 4 | 45 | 5 | 33 | 16 | 39 | 31 | 35 | 23 | 40 | 30 | 29 | 32 | 46 | |
| HILO, HI | 19 | 36 | 35 | 34 | 39 | 35 | 28 | 34 | 26 | 35 | 29 | 11 | 25 | 5 | 25 | 36 | 25 | 4 | 25 | 34 | 29 | 2 | 28 | 36 | 29 | 34 | 39 | |
| HONOLULU,HI | 18 | 7 | 32 | 7 | 35 | 6 | 32 | 6 | 31 | 13 | 30 | 5 | 26 | 5 | 30 | 4 | 28 | 13 | 38 | 6 | 28 | 20 | 46 | 6 | 34 | 20 | 46 | |
| KAHULUI, HI | 24 | SW | 44 | NE | 40 | N | 43 | E | 36 | E | 34 | E | 33 | NE | 37 | NE | 35 | E | 33 | E | 36 | SW | 41 | E | 36 | SW | 44 | |
| LIHUE, HI | 19 | 19 | 37 | 23 | 41 | 6 | 39 | 5 | 36 | 6 | 33 | 6 | 31 | 8 | 29 | 5 | 31 | 15 | 84 | 4 | 33 | 18 | 65 | 40 | 41 | 15 | 84 | |
| BOISE, ID | 57 | SE | 50 | W | 56 | W | 52 | W | 50 | W | 50 | SW | 50 | W | 61 | SE | 56 | SE | 50 | SE | 56 | NW | 57 | NW | 56 | W | 61 | |
| LEWISTON, ID | G | 27 | 72 | 64 | 60 | 58 | 54 | 54 | 29 | 59 | 51 | 59 | 59 | 59 | 63 | 72 | ||||||||||||
| POCATELLO, ID | 47 | SE | 61 | W | 57 | W | 72 | S | 61 | W | 61 | W | 50 | W | 57 | SW | 54 | W | 57 | SW | 54 | W | 67 | NW | 57 | W | 72 | |
| CAIRO,IL | 45 | SW | 50 | SW | 68 | NW | 60 | SW | 59 | SW | 63 | SW | 60 | NW | 49 | S | 45 | SW | 47 | SW | 40 | SW | 53 | SW | 63 | SW | 68 | |
| CHICAGO,IL | 40 | 28 | 47 | 25 | 45 | 1 | 54 | 24 | 54 | 34 | 52 | 24 | 41 | 36 | 55 | 32 | 46 | 23 | 58 | 20 | 48 | 23 | 51 | 26 | 46 | 23 | 58 | |
| MOLINE, IL | 9 | 29 | 40 | 27 | 33 | 27 | 43 | 26 | 49 | 30 | 40 | 10 | 41 | 26 | 33 | 20 | 57 | 26 | 32 | 26 | 40 | 26 | 49 | 7 | 36 | 20 | 57 | |
| PEORIA, IL | 13 | 23 | 38 | 31 | 37 | 23 | 54 | 24 | 45 | 31 | 35 | 30 | 44 | 26 | 40 | 20 | 36 | 29 | 35 | 27 | 44 | 20 | 48 | 6 | 46 | 23 | 54 | |
| ROCKFORD, IL | 48 | 27 | 40 | 25 | 45 | 25 | 46 | 11 | 54 | 27 | 52 | 20 | 47 | 30 | 53 | 29 | 57 | 20 | 52 | 21 | 40 | 20 | 46 | 6 | 46 | 29 | 57 | |
| SPRINGFIELD, IL | 19 | 25 | 39 | 29 | 36 | 24 | 56 | 25 | 51 | 23 | 39 | 16 | 43 | 15 | 35 | 29 | 41 | 18 | 39 | 20 | 40 | 24 | 46 | 25 | 36 | 24 | 56 | |
| EVANSVILLE, IN | 13 | 15 | 33 | 26 | 43 | 25 | 40 | 28 | 44 | 33 | 46 | 24 | 40 | 32 | 35 | 32 | 36 | 28 | 36 | 23 | 36 | 31 | 41 | 24 | 41 | 33 | 46 | |
| FORT WAYNE, IN | 49 | SW | 59 | W | 61 | S | 65 | W | 63 | S | 57 | SE | 65 | NW | 61 | N | 55 | W | 52 | SW | 46 | SW | 57 | SW | 52 | S | 65 | |
| INDIANAPOLIS, IN | 19 | 19 | 45 | 24 | 45 | 21 | 54 | 25 | 47 | 30 | 40 | 29 | 46 | 28 | 49 | 32 | 40 | 25 | 38 | 27 | 43 | 23 | 44 | 22 | 40 | 28 | 49 | |
| SOUTH BEND, IN | 49 | 22 | 52 | 20 | 47 | 20 | 51 | 27 | 55 | 27 | 68 | 27 | 50 | 34 | 45 | 32 | 63 | 25 | 36 | 24 | 40 | 22 | 58 | 23 | 43 | 27 | 68 | |
| DES MOINES, IA | 43 | NW | 66 | W | 56 | S | 66 | W | 76 | W | 70 | NW | 76 | W | 73 | SSE | 60 | NW | 55 | W | 56 | W | 72 | SW | 61 | W | 76 | |
| DUBUQUE,IA | G | 15 | 58 | 52 | 62 | 68 | 74 | 55 | NW | 74 | 32 | 66 | NW | 58 | 54 | 55 | E | 56 | 74 | |||||||||
| SIOUX CITY, IA | 54 | NW | 56 | NW | 54 | N | 61 | W | 68 | W | 80 | W | 91 | NW | 66 | NW | 56 | S | 66 | W | 70 | NW | 59 | NW | 53 | W | 91 | |
| WATERLOO, IA | 38 | 29 | 46 | 28 | 44 | 23 | 46 | 25 | 52 | 18 | 52 | 33 | 60 | 35 | 58 | 21 | 46 | 28 | 38 | 29 | 43 | 22 | 53 | 32 | 39 | 33 | 60 | |
| CONCORDIA, KS | 17 | 32 | 46 | 32 | 39 | 35 | 46 | 17 | 51 | 30 | 41 | 24 | 54 | 25 | 58 | 6 | 44 | 17 | 44 | 26 | 46 | 34 | 46 | 35 | 40 | 25 | 58 | |
| DODGE CITY, KS | 12 | 34 | 56 | 24 | 41 | 35 | 63 | 21 | 53 | 30 | 52 | 29 | 60 | 36 | 56 | 26 | 55 | 14 | 51 | 27 | 48 | 17 | 41 | 1 | 43 | 35 | 63 | |
| GOODLAND, KS | 49 | 34 | 53 | 32 | 46 | 32 | 57 | 29 | 62 | 27 | 61 | 33 | 66 | 30 | 64 | 23 | 60 | 34 | 51 | 27 | 61 | 33 | 52 | 34 | 52 | 33 | 66 | |
| TOPEKA, KS | 13 | 31 | 39 | 31 | 36 | 18 | 55 | 8 | 51 | 19 | 40 | 34 | 48 | 34 | 44 | 27 | 38 | 34 | 35 | 23 | 39 | 31 | 45 | 30 | 37 | 18 | 55 | |
| WICHITA, KS | 17 | 35 | 48 | 20 | 44 | 28 | 46 | 8 | 54 | 18 | 61 | 30 | 51 | 34 | 70 | 4 | 52 | 19 | 44 | 31 | 49 | 33 | 48 | 32 | 44 | 34 | 70 | |
| GREATER CINCINNATI AP | 35 | 28 | 46 | 29 | 40 | 25 | 44 | 25 | 46 | 31 | 37 | 24 | 40 | 21 | 35 | 31 | 37 | 31 | 36 | 27 | 35 | 28 | 43 | 21 | 40 | 28 | 46 | |
| JACKSON, KY | 17 | 23 | 37 | 19 | 39 | 31 | 33 | 27 | 43 | 28 | 39 | 29 | 30 | 33 | 32 | 28 | 25 | 24 | 21 | 25 | 26 | 19 | 30 | 30 | 30 | 27 | 43 | |
| LEXINGTON, KY | 37 | 22 | 43 | 32 | 46 | 27 | 36 | 32 | 46 | 22 | 35 | 30 | 44 | 29 | 37 | 22 | 39 | 32 | 32 | 26 | 32 | 15 | 39 | 19 | 37 | 32 | 46 | |
| LOUISVILLE, KY | 13 | 16 | 38 | 24 | 38 | 20 | 40 | 27 | 39 | 23 | 40 | 4 | 54 | 32 | 46 | 31 | 39 | 29 | 39 | 23 | 37 | 23 | 44 | 29 | 31 | 4 | 54 | |
| PADUCAH KY | 14 | 30 | 41 | 25 | 37 | 19 | 37 | 22 | 36 | 24 | 51 | 27 | 40 | 30 | 44 | 10 | 33 | 18 | 35 | 24 | 43 | 21 | 44 | 22 | 35 | 24 | 51 | |
| BATON ROUGE, LA | 36 | 27 | 35 | 17 | 39 | 27 | 38 | 23 | 39 | 17 | 48 | 3 | 40 | 3 | 41 | 14 | 46 | 6 | 58 | 33 | 40 | 22 | 33 | 28 | 39 | 6 | 58 | |
| LAKE CHARLES, LA | 37 | 32 | 58 | 25 | 40 | 18 | 40 | 6 | 44 | 31 | 43 | 19 | 53 | 33 | 36 | 11 | 46 | 36 | 40 | 33 | 38 | 21 | 46 | 30 | 35 | 32 | 58 | |
| NEW ORLEANS, LA | 39 | 27 | 48 | 26 | 43 | 16 | 38 | 10 | 40 | 36 | 55 | 25 | 49 | 13 | 44 | 33 | 42 | 9 | 69 | 17 | 40 | 30 | 35 | 28 | 46 | 9 | 69 | |
| SHREVEPORT, LA | 36 | 30 | 41 | 30 | 43 | 29 | 41 | 28 | 52 | 35 | 58 | 36 | 46 | 29 | 46 | 11 | 40 | 19 | 44 | 20 | 36 | 31 | 46 | 14 | 37 | 35 | 58 | |
| CARIBOU, ME | 9 | 31 | 36 | 28 | 33 | 34 | 31 | 33 | 33 | 37 | 34 | 35 | 32 | 32 | 33 | 28 | 30 | 26 | 30 | 40 | 1 | 33 | 31 | 39 | 30 | 40 | ||
| PORTLAND, ME | 13 | 16 | 38 | 8 | 45 | 7 | 37 | 29 | 40 | 36 | 32 | 28 | 35 | 7 | 31 | 28 | 57 | 29 | 33 | 14 | 37 | 10 | 41 | 30 | 40 | 28 | 57 | |
| BALTIMORE, MD | 46 | NE | 63 | W | 68 | SE | 80 | W | 70 | SW | 65 | SW | 80 | NW | 57 | NE | 54 | W | 56 | SE | 73 | E | 58 | W | 57 | SE | 80 | |
| BLUE HILL, MA | 35 | S | 76 | S | 77 | ENE | 72 | NW | 66 | S | 65 | NW | 61 | NW | 78 | SSW | 67 | SSE | 92 | S | 62 | S | 67 | SSE | 68 | SSE | 92 | |
| BOSTON, MA | 13 | 17 | 46 | 8 | 43 | 6 | 54 | 28 | 43 | 24 | 43 | 28 | 45 | 26 | 46 | 8 | 47 | 23 | 47 | 4 | 47 | 11 | 48 | 5 | 51 | 6 | 54 | |
| WORCESTER, MA | 42 | 25 | 60 | 32 | 76 | 29 | 76 | 5 | 54 | 31 | 51 | 25 | 39 | 31 | 46 | 36 | 44 | 30 | 36 | 25 | 43 | 20 | 54 | 23 | 51 | 32 | 76 | |
| ALPENA, MI | 18 | 12 | 29 | 35 | 37 | 32 | 31 | 16 | 38 | 21 | 35 | 21 | 35 | 14 | 37 | 31 | 35 | 20 | 30 | 18 | 30 | 20 | 38 | 7 | 31 | 20 | 38 | |
| DETROIT, MI | 19 | 22 | 48 | 22 | 51 | 21 | 46 | 24 | 46 | 23 | 43 | 23 | 37 | 28 | 53 | 23 | 33 | 28 | 35 | 24 | 47 | 24 | 45 | 29 | 49 | 28 | 53 | |
| FLINT, MI | 43 | 26 | 45 | 24 | 39 | 27 | 58 | 24 | 44 | 32 | 81 | 29 | 52 | 29 | 41 | 27 | 37 | 27 | 46 | 25 | 39 | 23 | 46 | 27 | 40 | 32 | 81 | |
| GRAND RAPIDS, MI | 19 | 24 | 45 | 33 | 37 | 23 | 43 | 24 | 52 | 26 | 47 | 24 | 39 | 36 | 38 | 20 | 31 | 25 | 39 | 24 | 47 | 23 | 49 | 24 | 39 | 24 | 52 | |
| HOUGHTON LAKE, MI | 21 | 26 | 40 | 27 | 35 | 22 | 31 | 24 | 37 | 26 | 40 | 27 | 40 | 32 | 32 | 26 | 26 | 23 | 32 | 27 | 34 | 27 | 40 | 27 | 32 | 26 | 40 | |
| LANSING, MI | 37 | SW | 54 | SW | 56 | W | 59 | W | 61 | W | 46 | SE | 63 | NE | 56 | SW | 47 | N | 57 | SW | 48 | W | 56 | SW | 56 | SE | 63 | |
| MARQUETTE, MI | 6 | NW | 44 | NW | 31 | NW | 40 | NW | 44 | N | 34 | NW | 38 | NW | 35 | NW | 37 | W | 35 | SE | 38 | NW | 31 | SW | 35 | NW | 44 | |
| MUSKEGON, MI | 39 | 31 | 44 | 34 | 41 | 25 | 41 | 22 | 48 | 27 | 44 | 24 | 44 | 33 | 40 | 35 | 35 | 20 | 40 | 22 | 40 | 23 | 52 | 23 | 40 | 23 | 52 | |
| SAULT STE. MARIE, MI | 27 | NW | 47 | W | 47 | SE | 42 | SE | 42 | E | 49 | S | 37 | SE | 44 | NW | 35 | W | 43 | NW | 42 | NW | 60 | NW | 45 | NW | 60 | |
| DULUTH, MN | 13 | 30 | 45 | 8 | 33 | E | 57 | 20 | 43 | 9 | 39 | 27 | 46 | 31 | 41 | 26 | 48 | 26 | 33 | 32 | 46 | 8 | 44 | 29 | 32 | E | 57 | |
| INTERNATIONAL FALLS, MN | 43 | 30 | 35 | 26 | 36 | 29 | 42 | 23 | 52 | 20 | 52 | 18 | 46 | 29 | 46 | 32 | 40 | 23 | 35 | 30 | 47 | 27 | 35 | 31 | 33 | 23 | 52 | |
| MINNEAPOLIS - ST. PAUL, MN | 19 | 32 | 51 | 34 | 37 | 8 | 33 | 18 | 45 | 22 | 49 | 33 | 48 | 35 | 43 | 20 | 44 | 18 | 36 | 31 | 43 | 25 | 41 | 34 | 35 | 32 | 51 | |
| ROCHESTER, MN | 36 | 30 | 48 | 28 | 45 | 23 | 58 | 30 | 53 | 25 | 69 | 13 | 53 | 17 | 51 | 34 | 46 | 24 | 44 | 30 | 47 | 29 | 47 | 32 | 47 | 25 | 69 | |
| SAINT CLOUD, MN | 9 | 1 | 36 | 28 | 38 | 31 | 36 | 34 | 40 | 22 | 40 | 32 | 62 | 22 | 49 | 22 | 45 | 32 | 34 | 31 | 41 | 30 | 39 | 31 | 39 | 32 | 62 | |
| JACKSON, MS | 22 | 35 | 46 | 13 | 43 | 16 | 44 | 12 | 43 | 22 | 35 | 35 | 40 | 33 | 44 | 17 | 37 | 6 | 55 | 34 | 26 | 14 | 41 | 15 | 41 | 6 | 55 | |
| MERIDIAN, MS | 39 | 19 | 37 | 2 | 35 | 34 | 39 | 19 | 48 | 17 | 35 | 22 | 46 | 3 | 40 | 8 | 33 | 2 | 45 | 2 | 35 | 19 | 41 | 30 | 35 | 19 | 48 | |
| TUPELO, MS | 15 | 24 | 39 | 10 | 34 | 24 | 39 | 10 | 33 | 34 | 38 | 20 | 41 | 35 | 48 | 1 | 41 | 30 | 32 | 25 | 38 | 23 | 37 | 11 | 38 | 35 | 48 | |
| Data through 1998 | Years | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | DR | SP | |||
| COLUMBIA, MO | 10 | NW | 49 | 25 | 35 | 26 | 46 | 31 | 43 | 31 | 38 | 26 | 49 | 31 | 46 | 19 | 52 | 35 | 38 | 25 | 47 | 19 | 45 | 6 | 37 | 19 | 52 | |
| KANSAS CITY, MO | 14 | 18 | 36 | 19 | 39 | 20 | 40 | 17 | 47 | 33 | 45 | 35 | 48 | 18 | 46 | 31 | 40 | 14 | 41 | 21 | 40 | 22 | 37 | 20 | 39 | 35 | 48 | |
| ST. LOUIS, MO | 19 | 29 | 40 | 30 | 45 | 27 | 48 | 27 | 49 | 34 | 46 | 27 | 48 | 36 | 46 | 31 | 40 | 25 | 41 | 28 | 52 | 11 | 41 | 29 | 39 | 28 | 52 | |
| SPRINGFIELD, MO | 13 | NW | 39 | 19 | 34 | 25 | 39 | 34 | 41 | 29 | 36 | 36 | 47 | 28 | 46 | 36 | 48 | 10 | 40 | 22 | 35 | 10 | 43 | 18 | 34 | 36 | 48 | |
| BILLINGS, MT | 55 | W | 66 | W | 72 | NW | 61 | NW | 72 | NN | 68 | NW | 79 | N | 73 | NW | 69 | NW | 61 | NW | 68 | NW | 63 | NW | 66 | NW | 79 | |
| GLASGOW, MT | 30 | 33 | 41 | 28 | 44 | 10 | 41 | 30 | 54 | 26 | 41 | 6 | 53 | 30 | 69 | 23 | 66 | 30 | 46 | 32 | 44 | 27 | 48 | 29 | 54 | 30 | 69 | |
| GREAT FALLS, MT | 50 | SW | 65 | W | 72 | W | 73 | W | 70 | SW | 65 | NW | 70 | W | 73 | SW | 71 | NW | 73 | W | 73 | SW | 73 | SW | 82 | SW | 82 | |
| HELENA, MT | 58 | SW | 73 | W | 73 | SW | 61 | W | 52 | SW | 56 | W | 56 | SW | 65 | S | 65 | NW | 54 | W | 62 | SW | 56 | NW | 59 | SW | 73 | |
| KALISPELL, MT | 32 | 4 | 52 | 1 | 40 | 3 | 41 | 25 | 37 | 23 | 40 | 3 | 38 | 31 | 38 | 15 | 43 | 22 | 36 | 32 | 38 | 3 | 35 | 3 | 52 | 4 | 52 | |
| MISSOULA, MT | 53 | S | 52 | NW | 47 | SW | 50 | NW | 51 | SW | 57 | S | 51 | SE | 72 | SW | 58 | N | 43 | SW | 51 | SW | 42 | W | 56 | SE | 72 | |
| GRAND ISLAND, NE | 36 | 34 | 54 | 33 | 48 | 34 | 55 | 21 | 52 | 24 | 55 | 30 | 68 | 29 | 59 | 36 | 48 | 25 | 40 | 33 | 51 | 34 | 51 | 31 | 52 | 30 | 68 | |
| LINCOLN, NE | 26 | 33 | 48 | NW | 48 | N | 54 | NW | 52 | W | 51 | NE | 67 | SW | 52 | NW | 65 | SW | 40 | 30 | 47 | NW | 48 | 34 | 46 | NE | 67 | |
| NORFOLK, NE | 17 | 33 | 46 | 34 | 43 | 30 | 44 | 32 | 51 | 7 | 44 | 28 | 46 | 21 | 58 | 32 | 60 | 30 | 55 | 18 | 46 | 31 | 51 | 35 | 46 | 32 | 60 | |
| NORTH PLATTE, NE | 19 | 31 | 45 | 21 | 48 | 2 | 47 | 31 | 46 | 31 | 48 | 32 | 52 | 36 | 54 | 27 | 45 | 33 | 43 | 31 | 53 | 29 | 46 | 2 | 52 | 31 | 53 | |
| OMAHA EPPLEY AP, NE | 10 | 33 | 45 | 35 | 37 | 33 | 40 | 31 | 43 | 16 | 57 | 24 | 40 | 28 | 58 | 31 | 40 | 19 | 36 | 11 | 48 | 28 | 45 | 34 | 39 | 28 | 58 | |
| OMAHA (NORTH), NE | 15 | NW | 41 | NW | 38 | NW | 38 | NW | 46 | N | 34 | SW | 39 | SW | 50 | NW | 39 | NW | 35 | NW | 34 | NW | 38 | NW | 37 | SW | 50 | |
| SCOTTSBLUFF, NE | 48 | 34 | 53 | 29 | 60 | 29 | 62 | 31 | 55 | 32 | 80 | 29 | 80 | 5 | 52 | 35 | 52 | 32 | 46 | 31 | 48 | 29 | 56 | 32 | 47 | 32 | 80 | |
| VALENTINE, NE | 16 | 32 | 43 | 30 | 52 | 33 | 43 | 30 | 49 | 31 | 44 | 29 | 53 | 34 | 46 | 20 | 53 | 31 | 40 | 32 | 45 | 30 | 45 | 31 | 41 | 20 | 53 | |
| ELKO, NV | 37 | 23 | 40 | 27 | 39 | 29 | 41 | 25 | 48 | 34 | 55 | 27 | 61 | 21 | 37 | 16 | 35 | 27 | 58 | 29 | 35 | 20 | 40 | 27 | 50 | 27 | 61 | |
| ELY, NV | 53 | SE | 66 | S | 56 | SW | 65 | S | 59 | S | 74 | SW | 63 | S | 50 | E | 57 | S | 57 | S | 65 | S | 51 | SE | 61 | S | 74 | |
| LAS VEGAS, NV | 13 | 23 | 45 | 23 | 50 | 23 | 51 | 22 | 49 | 32 | 53 | 34 | 48 | 30 | 45 | 32 | 43 | 16 | 41 | 31 | 47 | 21 | 43 | 24 | 43 | 32 | 53 | |
| RENO, NV | 9 | 16 | 45 | 19 | 39 | 17 | 48 | SW | 50 | 17 | 46 | 23 | 37 | 20 | 35 | 24 | 35 | 21 | 32 | 15 | 41 | 19 | 52 | 14 | 47 | 19 | 52 | |
| WINNEMUCCA, NV | 47 | W | 56 | W | 59 | W | 66 | |||||||||||||||||||||