UNIONVILLE, MARYLAND

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 39.6 44.2 53.9 65.1 74.5 82.8 86.7 84.8 77.9 66.6 55.2 44.0 64.6
Highest Mean Max. Temperature (F) 50.6 54.4 60.5 72.5 81.6 87.6 92.7 90.8 84.0 72.6 61.0 53.2 92.7
Year Highest Occurred 1990 1976 1977 1994 1991 1994 1988 1988 1998 1995 1999 1984 1988
Lowest Mean Max. Temperature (F) 29.1 30.3 45.3 58.9 70.2 77.4 81.9 80.8 72.8 61.1 48.8 30.8 29.1
Year Lowest Occurred 1977 1979 1984 1975 1973 1972 1979 1992 1975 1976 1996 1989 1977
Mean Temperature (F) 30.0 33.2 41.9 51.5 61.2 69.9 74.3 72.3 65.4 53.7 43.7 34.3 52.6
Highest Mean Temperature (F) 40.7 42.1 47.2 55.8 67.7 73.3 77.8 76.0 69.9 60.4 48.4 42.2 77.8
Year Highest Occurred 1990 1990 1973 1994 1991 1996 1999 1995 1998 1971 1999 1984 1999
Lowest Mean Temperature (F) 19.6 19.9 35.7 47.3 57.5 66.4 70.8 69.0 61.5 47.4 37.6 20.9 19.6
Year Lowest Occurred 1977 1979 1984 1975 1994 1980 2000 1982 1988 1988 1976 1989 1977
Mean Min. Temperature (F) 20.3 22.2 29.9 37.9 47.8 57.0 61.9 59.7 52.8 40.8 32.2 24.6 40.6
Highest Mean Min. Temperature (F) 30.8 31.3 36.6 42.0 53.8 61.7 65.3 64.4 59.1 51.0 38.3 31.2 65.3
Year Highest Occurred 1990 1990 1973 1981 1991 1989 1991 1978 1971 1971 1977 1984 1991
Lowest Mean Min. Temperature (F) 10.0 9.5 25.1 32.1 42.1 52.7 58.3 55.4 45.1 32.8 24.9 11.0 9.5
Year Lowest Occurred 1977 1979 1987 1971 1994 1980 1983 1986 1988 1988 1976 1989 1979
Mean Precipitation (in.) 3.37 2.52 3.63 3.38 4.16 4.31 3.53 3.22 3.87 3.49 3.63 3.19 42.30
Highest Precipitation (in.) 9.10 4.84 8.94 7.15 8.38 16.26 10.51 8.38 12.86 8.59 8.11 7.14 16.26
Year Highest Occurred 1996 1979 1993 1983 1989 1972 1996 1971 1975 1976 1993 1973 1972
Lowest Precipitation (in.) 0.39 0.45 0.45 0.49 0.73 0.74 0.43 0.79 0.79 0.97 0.48 0.36 0.36
Year Lowest Occurred 1981 1977 1995 1985 1986 1988 1983 1982 1986 2000 1981 1995 1995
Heating Degree Days (F) 1087. 891. 716. 405. 154. 16. 0. 6. 64. 360. 639. 952. 5290.
Cooling Degree Days (F) 0. 0. 0. 0. 36. 164. 288. 231. 75. 9. 0. 0. 803.

Southeast Regional Climate Center, sercc@climate.ncsu.edu