STEVENS PASS, WASHINGTON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 30.1 32.5 37.2 42.2 49.6 56.2 65.0 65.7 58.7 47.8 34.4 30.2 45.8
Highest Mean Max. Temperature (F) 35.5 38.9 44.3 47.8 58.1 63.6 73.2 72.8 65.0 55.0 40.7 37.2 73.2
Year Highest Occurred 1983 1991 1992 1987 1992 1992 1985 1971 1998 1987 1976 1976 1985
Lowest Mean Max. Temperature (F) 21.9 24.8 31.6 37.5 43.1 51.3 55.9 59.2 50.0 41.8 22.3 22.2 21.9
Year Lowest Occurred 1979 1989 1971 1972 1996 1971 1993 1975 1978 1990 1985 1983 1979
Mean Temperature (F) 25.1 27.0 30.9 35.1 41.8 47.7 55.0 55.8 49.5 40.8 29.5 25.1 38.6
Highest Mean Temperature (F) 31.8 34.1 37.5 40.3 48.5 53.0 60.2 61.0 53.9 47.4 34.9 31.5 61.0
Year Highest Occurred 1994 1991 1992 1990 1993 1992 1985 1977 1990 1988 1981 1976 1977
Lowest Mean Temperature (F) 15.8 18.7 24.3 29.3 37.1 42.7 49.8 50.1 44.3 35.9 17.4 16.8 15.8
Year Lowest Occurred 1979 1989 1971 1972 1974 1976 1993 1975 1978 1984 1985 1983 1979
Mean Min. Temperature (F) 20.0 21.5 24.5 28.0 34.0 39.2 44.9 45.8 40.2 33.8 24.6 19.9 31.4
Highest Mean Min. Temperature (F) 28.5 29.3 30.7 33.2 40.3 42.5 49.6 49.9 44.9 40.5 30.1 25.8 49.9
Year Highest Occurred 1994 1991 1992 1990 1993 1992 1998 1990 1990 1988 1981 1976 1990
Lowest Mean Min. Temperature (F) 9.7 12.6 17.0 21.0 29.6 33.8 41.0 41.1 36.6 28.9 12.4 11.4 9.7
Year Lowest Occurred 1979 1989 1971 1972 1974 1976 1986 1975 1983 1984 1985 1983 1979
Mean Precipitation (in.) 12.90 9.30 7.31 4.83 3.86 3.35 1.61 1.81 3.56 6.46 13.83 14.04 82.86
Highest Precipitation (in.) 25.90 22.82 14.08 8.99 9.32 8.04 5.33 5.88 7.36 16.64 30.31 28.07 30.31
Year Highest Occurred 1974 1972 1997 1981 1984 1981 1983 1976 1978 1990 1990 1975 1990
Lowest Precipitation (in.) 0.92 0.89 1.46 2.00 1.82 1.03 0.00 0.32 0.29 0.12 2.59 2.22 0.00
Year Lowest Occurred 1985 1993 1992 1971 1972 1982 1985 1998 1989 1987 1979 1985 1985
Heating Degree Days (F) 1240. 1064. 1059. 897. 719. 518. 316. 294. 468. 750. 1066. 1239. 9630.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 0. 5. 6. 1. 0. 0. 0. 12.

Western Regional Climate Center, wrcc@dri.edu