HARRINGTON 1 NW, WASHINGTON

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 31.2 38.8 48.3 58.6 67.7 76.5 84.5 83.4 73.3 59.3 41.6 32.2 58.0
Highest Mean Max. Temperature (F) 39.1 45.1 53.9 66.2 73.0 84.1 91.8 91.5 82.5 66.6 47.2 38.6 60.2
Year Highest Occurred 1983 1968 1990 1977 1966 1961 1985 1967 1990 1988 1990 1979 1987
Lowest Mean Max. Temperature (F) 18.9 30.1 41.5 52.7 62.6 69.3 78.1 77.4 65.2 55.0 27.4 22.7 54.2
Year Lowest Occurred 1979 1989 1975 1975 1962 1981 1983 1968 1985 1969 1985 1983 1985
Mean Temperature (F) 25.4 32.0 38.9 45.8 53.1 60.6 66.5 66.0 57.4 46.3 34.8 26.6 46.1
Highest Mean Temperature (F) 34.4 37.3 44.1 50.4 56.5 65.5 70.6 70.8 63.7 52.3 39.5 33.5 47.8
Year Highest Occurred 1981 1983 1986 1987 1969 1970 1985 1961 1963 1988 1990 1979 1987
Lowest Mean Temperature (F) 11.7 21.6 33.1 41.6 49.4 55.3 62.1 61.2 52.3 42.6 19.7 17.1 42.2
Year Lowest Occurred 1979 1985 1985 1967 1974 1981 1986 1964 1985 1969 1985 1983 1985
Mean Min. Temperature (F) 19.5 25.2 29.5 33.0 38.5 44.5 48.4 48.5 41.4 33.3 28.0 21.0 34.2
Highest Mean Min. Temperature (F) 29.8 31.7 35.0 36.5 43.3 49.7 54.3 53.4 47.3 38.0 32.7 28.9 35.5
Year Highest Occurred 1981 1961 1986 1987 1980 1969 1975 1977 1963 1988 1983 1962 1967
Lowest Mean Min. Temperature (F) 4.5 13.0 23.4 28.4 34.1 40.5 44.4 43.2 36.7 29.5 12.0 8.7 30.1
Year Lowest Occurred 1979 1985 1985 1972 1982 1962 1986 1969 1983 1984 1985 1984 1985
Mean Precipitation (in.) 1.31 1.19 1.22 0.97 1.20 0.87 0.56 0.53 0.59 0.88 1.78 1.87 12.97
Highest Precipitation (in.) 3.34 3.24 2.17 2.17 2.82 2.40 1.91 1.62 1.71 2.35 5.00 3.96 17.67
Year Highest Occurred 1970 1961 1989 1978 1980 1982 1978 1979 1982 1990 1973 1973 1983
Lowest Precipitation (in.) 0.15 0.11 0.06 0.04 0.13 0.07 0.00 0.00 0.00 0.00 0.16 0.38 8.36
Year Lowest Occurred 1963 1988 1965 1977 1982 1989 1988 1988 1990 1987 1990 1976 1976
Heating Degree Days (F) 1228. 924. 809. 576. 369. 167. 49. 80. 254. 580. 906. 1190. 7132.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 35. 96. 111. 26. 0. 0. 0. 268.

Western Regional Climate Center, wrcc@dri.edu