UNIONVILLE, MARYLAND

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 37.9 41.3 52.7 62.1 72.6 80.8 84.8 83.1 76.4 65.6 54.5 42.8 62.9
Highest Mean Max. Temperature (F) 48.5 52.7 59.0 69.0 78.1 86.5 92.3 90.4 81.2 71.9 60.2 53.9 66.7
Year Highest Occurred 1990 1976 1977 1985 1986 1988 1988 1988 1980 1963 1990 1984 1990
Lowest Mean Max. Temperature (F) 28.1 30.0 45.1 56.2 65.6 74.8 81.2 79.3 70.3 59.4 48.4 31.5 61.2
Year Lowest Occurred 1977 1979 1984 1975 1967 1972 1976 1967 1975 1976 1967 1989 1969
Mean Temperature (F) 27.2 29.7 40.2 48.8 59.8 68.5 73.0 71.2 63.8 52.6 42.4 32.5 50.8
Highest Mean Temperature (F) 37.6 39.7 45.6 53.2 63.5 71.5 77.3 74.7 69.0 58.9 47.4 41.8 54.8
Year Highest Occurred 1990 1990 1973 1981 1965 1989 1988 1988 1961 1971 1985 1984 1990
Lowest Mean Temperature (F) 16.9 18.3 34.7 45.0 53.9 65.1 70.5 68.5 60.0 46.8 35.9 20.5 49.2
Year Lowest Occurred 1977 1979 1984 1975 1967 1972 1976 1976 1975 1988 1976 1989 1963
Mean Min. Temperature (F) 16.4 18.1 27.7 35.4 47.1 56.2 61.1 59.3 51.1 39.5 30.2 22.2 38.7
Highest Mean Min. Temperature (F) 26.6 28.4 34.8 39.9 51.3 61.1 63.7 64.0 57.9 49.7 36.1 29.6 42.9
Year Highest Occurred 1990 1990 1973 1981 1975 1989 1989 1978 1971 1971 1977 1984 1990
Lowest Mean Min. Temperature (F) 5.6 6.6 23.3 30.0 42.1 52.1 58.0 55.0 43.9 31.5 22.7 9.4 36.1
Year Lowest Occurred 1977 1979 1987 1971 1967 1980 1983 1986 1988 1988 1976 1989 1988
Mean Precipitation (in.) 2.72 2.55 3.13 3.29 4.07 4.18 3.36 3.15 3.37 3.22 3.43 3.20 39.67
Highest Precipitation (in.) 7.47 4.84 5.62 7.15 8.38 16.26 6.47 8.38 12.86 8.59 6.83 7.14 55.03
Year Highest Occurred 1979 1979 1980 1983 1989 1972 1969 1971 1975 1976 1972 1973 1972
Lowest Precipitation (in.) 0.39 0.34 1.28 0.49 0.51 0.74 0.43 0.79 0.79 0.38 0.48 0.64 30.74
Year Lowest Occurred 1981 1968 1966 1985 1964 1988 1983 1982 1986 1963 1981 1980 1965
Heating Degree Days (F) 1172. 988. 769. 486. 181. 14. 0. 0. 95. 391. 678. 1008. 5782.
Cooling Degree Days (F) 0. 0. 0. 0. 19. 119. 248. 197. 59. 7. 0. 0. 649.

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