NRCC Northeast Regional Climate Center  

December State Temperature Averages

State December 2005 Coolest Warmest
Temperature Departure Rank Average Year Average Year
Connecticut 28.9 -2.2 41 17.5 1989 37.6 2001
Delaware 35.6 -2.8 39 26.0 1989 44.8 1984
Maine 21.8 1.4 66 5.3 1989 29.4 1900
Maryland 33.4 -3.4 33 24.5 1989 43.6 1984
Massachusetts 28.7 -1.5 42 16.4 1989 37.2 1923
New Hampshire 23.5 -0.6 57 8.5 1989 31.3 2001
New Jersey 33.2 -2.2 44 23.1 1989 41.7 2001
New York 24.2 -2.3 37 11.5 1989 33.8 2001
Pennsylvania 26.5 -4.2 26 17.8 1989 38.4 1923
Rhode Island 31.4 -2.8 38 21.9 1989 42.4 1928
Vermont 22.0 -0.7 53 5.0 1989 30.4 2001
West Virginia 30.2 -4.2 25 21.7 1989 42.6 1956
Northeast 26.2 -2.2 37 14.4 1989 35.5 1923

Rankings are for 111 years between 1895 and 2005. 1=coolest; 111=warmest.

December State Precipitation Averages

State December 2005 Driest Wettest
Precipitation Departure Pct Normal Rank Amount Year Amount Year
Connecticut 4.33 0.25 106% 70 0.79 1955 9.37 1973
Delaware 4.10 0.55 115% 80 0.64 1988 8.15 1996
Maine 5.44 1.93 155% 98 0.94 1943 8.76 1973
Maryland 3.15 -0.26 92% 55 0.48 1955 6.95 1969
Massachusetts 4.02 -0.03 99% 72 0.92 1943 8.52 1973
New Hampshire 4.29 0.85 124% 88 0.94 1943 8.72 1973
New Jersey 3.63 -0.08 97% 65 0.39 1955 7.96 1996
New York 2.71 -0.53 83% 44 1.13 1943 6.04 1973
Pennsylvania 2.46 -0.70 77% 40 0.58 1955 6.23 1990
Rhode Island 4.28 -0.08 98% 69 0.71 1955 10.20 1936
Vermont 3.25 0.06 101% 75 0.99 1943 7.51 1973
West Virginia 2.82 -0.61 82% 46 0.69 1965 7.08 1978
Northeast 3.36 -0.02 99% 62 1.02 1955 6.41 1973

Rankings are for 111 years between 1895 and 2005. 1=driest; 111=wettest.

Departures are calculated using the 1971-2000 normals.