VIENNA, MARYLAND

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 43.8 46.7 56.9 66.9 76.8 84.7 88.6 87.0 81.1 70.2 59.7 48.8 67.6
Highest Mean Max. Temperature (F) 52.9 57.4 61.6 74.9 82.8 88.9 94.0 90.5 85.1 74.9 65.4 58.9 71.1
Year Highest Occurred 1990 1976 1990 1985 1986 1986 1986 1988 1970 1971 1985 1971 1990
Lowest Mean Max. Temperature (F) 35.1 35.3 51.5 61.1 70.5 77.7 83.6 83.2 74.8 62.4 53.8 36.7 65.3
Year Lowest Occurred 1977 1979 1970 1965 1967 1974 1962 1967 1974 1974 1976 1989 1962
Mean Temperature (F) 34.9 37.4 46.5 55.4 65.2 73.6 77.8 76.3 69.9 59.0 49.4 39.7 57.1
Highest Mean Temperature (F) 42.0 46.4 51.8 61.1 69.5 76.8 81.8 79.9 74.4 65.7 57.3 48.1 58.8
Year Highest Occurred 1990 1976 1977 1985 1986 1989 1986 1988 1961 1971 1985 1971 1986
Lowest Mean Temperature (F) 26.5 26.6 42.0 51.2 59.4 68.3 73.9 73.4 65.4 51.7 43.1 26.2 55.5
Year Lowest Occurred 1977 1979 1984 1965 1967 1974 1962 1964 1974 1974 1976 1989 1974
Mean Min. Temperature (F) 26.0 28.1 35.9 43.9 53.6 62.5 67.0 65.7 58.7 47.7 39.1 30.6 46.6
Highest Mean Min. Temperature (F) 32.1 35.8 42.2 47.3 57.1 67.2 69.6 69.7 64.2 56.5 49.2 37.6 48.3
Year Highest Occurred 1967 1984 1977 1985 1979 1973 1986 1978 1961 1971 1985 1984 1973
Lowest Mean Min. Temperature (F) 17.9 17.8 31.5 41.0 48.2 58.4 64.2 61.9 54.8 40.8 32.3 15.7 44.7
Year Lowest Occurred 1977 1979 1984 1966 1967 1980 1962 1982 1963 1988 1976 1989 1963
Mean Precipitation (in.) 3.66 3.48 3.77 3.39 3.51 3.80 3.98 4.87 3.67 3.00 3.16 3.45 43.74
Highest Precipitation (in.) 8.41 7.14 7.01 6.61 8.90 11.81 9.57 14.28 10.83 7.58 7.01 8.52 59.59
Year Highest Occurred 1987 1979 1984 1983 1984 1989 1969 1967 1977 1971 1963 1969 1979
Lowest Precipitation (in.) 0.53 1.29 1.34 0.78 0.30 0.45 0.38 0.70 0.52 0.12 0.63 0.34 34.23
Year Lowest Occurred 1981 1978 1977 1985 1964 1988 1983 1987 1978 1963 1965 1989 1986
Heating Degree Days (F) 933. 773. 574. 292. 74. 0. 0. 0. 18. 224. 468. 784. 4140.
Cooling Degree Days (F) 0. 0. 0. 0. 80. 262. 397. 350. 165. 38. 0. 0. 1292.

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