NRCC Northeast Regional Climate Center  

December State Temperature Averages

State December 1998 Coolest Warmest
Temperature Departure Rank Average Year Average Year
Connecticut 36.4 6.5 101 17.5 1989 36.8 1990
Delaware 42.3 4.9 97 26.0 1989 44.8 1984
Maine 26.6 7.2 98 5.3 1989 29.4 1900
Maryland 41.7 5.8 98 24.5 1989 43.6 1984
Massachusetts 36.5 7.5 103 16.4 1989 37.2 1923
New Hampshire 30.9 8.0 104 8.5 1989 30.9 1998
New Jersey 40.3 5.9 102 23.1 1989 41.0 1923
New York 33.3 7.8 103 11.5 1989 33.7 1923
Pennsylvania 36.5 6.6 99 17.8 1989 38.4 1923
Rhode Island 38.8 5.8 99 21.9 1989 42.4 1928
Vermont 29.7 8.0 102 5.0 1989 29.8 1996+
West Virginia 38.4 4.7 92 21.7 1989 42.6 1956
Northeast 34.3 6.8 103 14.4 1989 35.5 1923

Rankings are for 104 years between 1895 and 1998. 1=coolest; 104=warmest.

December State Precipitation Averages

State December 1998 Driest Wettest
Precipitation Departure Pct Normal Rank Amount Year Amount Year
Connecticut 1.27 -2.79 31% 5 0.79 1955 9.37 1973
Delaware 2.50 -1.08 69% 31 0.64 1988 8.15 1996
Maine 1.84 -1.93 48% 10 0.94 1943 8.76 1973
Maryland 2.06 -1.36 60% 21 0.48 1955 6.95 1969
Massachusetts 1.63 -2.47 39% 10 0.92 1943 8.52 1973
New Hampshire 1.52 -2.13 41% 10 0.94 1943 8.72 1973
New Jersey 1.52 -2.15 41% 10 0.39 1955 7.96 1996
New York 1.58 -1.73 47% 8 1.13 1943 6.04 1973
Pennsylvania 1.44 -1.69 45% 9 0.58 1955 6.23 1990
Rhode Island 1.57 -2.84 35% 7 0.71 1955 10.20 1936
Vermont 1.53 -1.75 46% 9 0.99 1943 7.51 1973
West Virginia 2.72 -0.68 79% 38 0.69 1965 7.08 1978
Northeast 1.75 -1.70 50% 9 1.02 1955 6.41 1973

Rankings are for 104 years between 1895 and 1998. 1=driest; 104=wettest.

+ indicates extreme also occurred in one or more previous years.
Departures are calculated using the 1961-1990 normals.