STEVENS PASS, WASHINGTON

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 28.9 32.2 36.2 41.3 49.1 57.2 65.4 65.9 58.2 47.4 34.1 29.2 45.4
Highest Mean Max. Temperature (F) 34.4 39.8 41.6 47.1 56.8 66.9 74.0 75.3 67.5 54.1 39.9 36.2 47.7
Year Highest Occurred 1983 1963 1986 1987 1969 1961 1985 1967 1967 1987 1976 1976 1987
Lowest Mean Max. Temperature (F) 19.6 23.7 30.7 34.2 43.9 50.8 58.5 58.7 49.2 40.9 21.5 21.3 43.3
Year Lowest Occurred 1969 1989 1971 1970 1962 1971 1983 1975 1978 1990 1985 1983 1964
Mean Temperature (F) 24.0 27.0 29.8 34.3 41.2 48.4 55.1 55.8 49.0 40.3 29.5 24.4 38.2
Highest Mean Temperature (F) 29.8 34.0 35.1 40.0 46.3 58.2 60.8 63.1 55.8 47.0 34.5 31.0 40.3
Year Highest Occurred 1983 1963 1986 1990 1969 1969 1985 1969 1967 1988 1981 1976 1987
Lowest Mean Temperature (F) 13.6 18.2 23.9 29.0 36.9 42.5 50.2 49.9 43.9 35.5 16.9 16.4 36.1
Year Lowest Occurred 1969 1989 1971 1972 1974 1976 1986 1975 1978 1984 1985 1983 1975
Mean Min. Temperature (F) 19.0 21.7 23.4 27.1 33.1 39.5 44.8 45.6 39.8 33.1 24.9 19.5 31.0
Highest Mean Min. Temperature (F) 26.4 28.2 28.6 33.2 36.1 51.4 50.5 54.9 45.1 40.5 30.0 26.1 32.9
Year Highest Occurred 1981 1963 1986 1990 1983 1969 1969 1969 1969 1988 1981 1966 1969
Lowest Mean Min. Temperature (F) 7.5 12.6 17.1 21.1 29.7 33.8 41.0 41.1 36.1 28.8 12.3 11.4 28.7
Year Lowest Occurred 1969 1989 1971 1972 1974 1976 1986 1975 1964 1984 1985 1983 1985
Mean Precipitation (in.) 13.69 9.19 7.56 4.98 3.55 2.86 1.43 1.99 3.43 6.49 12.16 13.69 81.02
Highest Precipitation (in.) 25.90 22.82 13.03 8.99 9.32 8.04 5.33 5.88 8.94 20.49 30.31 28.07 119.27
Year Highest Occurred 1974 1972 1964 1981 1984 1981 1983 1976 1969 1967 1990 1975 1990
Lowest Precipitation (in.) 0.92 1.79 2.42 2.00 0.52 0.09 0.00 0.06 0.29 0.12 2.59 2.22 55.88
Year Lowest Occurred 1985 1973 1981 1971 1971 1970 1985 1970 1989 1987 1979 1985 1970
Heating Degree Days (F) 1271. 1064. 1091. 921. 738. 498. 314. 303. 480. 766. 1065. 1259. 9770.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 0. 7. 18. 0. 0. 0. 0. 25.

Western Regional Climate Center, wrcc@dri.edu