LA PLATA 1 W, MARYLAND

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 43.5 47.3 58.0 67.9 75.5 82.3 85.6 84.7 79.1 69.2 59.2 47.8 66.7
Highest Mean Max. Temperature (F) 53.6 60.0 64.3 74.0 81.4 85.6 89.8 88.5 85.3 75.5 65.4 56.4 68.9
Year Highest Occurred 1990 1976 1977 1985 1965 1969 1966 1968 1961 1963 1975 1971 1990
Lowest Mean Max. Temperature (F) 34.1 35.6 50.9 62.6 70.6 77.6 81.0 80.2 74.1 63.3 53.7 36.5 64.8
Year Lowest Occurred 1977 1979 1984 1975 1967 1982 1984 1982 1975 1988 1976 1989 1989
Mean Temperature (F) 33.8 37.0 46.2 55.0 63.9 71.6 75.6 74.6 68.4 57.6 48.3 38.3 55.9
Highest Mean Temperature (F) 43.5 46.7 52.1 60.0 68.3 74.7 78.4 77.4 73.1 63.9 55.4 46.0 58.5
Year Highest Occurred 1990 1976 1977 1985 1965 1973 1987 1988 1980 1971 1985 1971 1990
Lowest Mean Temperature (F) 24.0 26.8 41.2 50.7 58.0 68.7 72.5 72.0 64.6 52.4 41.6 27.3 54.4
Year Lowest Occurred 1977 1979 1984 1961 1967 1974 1962 1982 1984 1988 1976 1989 1962
Mean Min. Temperature (F) 24.1 26.5 34.3 42.1 52.2 60.9 65.5 64.5 57.6 46.0 37.4 28.8 45.0
Highest Mean Min. Temperature (F) 33.4 34.3 40.1 46.7 55.8 65.5 68.9 68.8 62.3 55.3 47.4 37.0 48.1
Year Highest Occurred 1990 1990 1973 1981 1985 1989 1987 1978 1977 1971 1985 1982 1990
Lowest Mean Min. Temperature (F) 13.8 17.9 29.9 36.8 45.4 58.3 61.0 60.8 52.7 40.6 29.5 18.1 41.9
Year Lowest Occurred 1977 1979 1969 1971 1967 1979 1962 1963 1963 1964 1976 1989 1963
Mean Precipitation (in.) 3.09 2.92 3.49 3.14 3.86 3.76 3.91 4.39 3.73 3.28 3.42 3.28 42.27
Highest Precipitation (in.) 9.06 5.84 6.30 8.05 6.98 13.48 12.40 14.65 10.18 8.05 7.31 7.70 58.66
Year Highest Occurred 1978 1979 1963 1983 1971 1972 1975 1971 1989 1971 1962 1969 1972
Lowest Precipitation (in.) 0.49 0.52 0.95 0.40 0.79 0.95 1.09 0.59 0.30 0.03 0.24 0.42 33.25
Year Lowest Occurred 1981 1978 1986 1985 1964 1976 1974 1989 1967 1963 1981 1980 1963
Heating Degree Days (F) 967. 784. 583. 303. 92. 0. 0. 0. 32. 249. 501. 828. 4339.
Cooling Degree Days (F) 0. 0. 0. 0. 58. 202. 329. 298. 134. 19. 0. 0. 1040.

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