STAMPEDE 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) 30.0 32.7 37.5 43.3 50.5 57.6 65.2 65.8 59.4 48.3 34.3 29.8 46.2
Highest Mean Max. Temperature (F) 37.3 39.3 47.9 50.3 57.5 63.7 73.5 71.4 66.0 57.5 40.8 37.3 73.5
Year Highest Occurred 1994 1991 1992 1977 1993 1977 1985 1977 1998 1987 1976 1980 1985
Lowest Mean Max. Temperature (F) 22.3 25.2 30.8 36.6 44.5 51.8 54.1 58.5 52.2 41.9 23.7 21.8 21.8
Year Lowest Occurred 1979 1989 1971 1972 1974 1999 1993 1975 1978 1975 1985 1983 1983
Mean Temperature (F) 25.9 28.2 32.3 36.9 43.1 49.4 56.1 57.0 51.7 42.6 30.7 25.8 40.0
Highest Mean Temperature (F) 33.5 33.6 40.7 41.8 48.9 54.4 62.5 62.0 57.1 49.9 35.6 32.9 62.5
Year Highest Occurred 1994 1991 1992 1977 1993 1992 1985 1977 1998 1987 1976 1980 1985
Lowest Mean Temperature (F) 16.6 20.2 26.0 30.3 38.3 45.6 48.5 50.7 45.8 37.5 19.7 17.9 16.6
Year Lowest Occurred 1979 1989 1971 1972 1974 1999 1993 1975 1972 1984 1985 1983 1979
Mean Min. Temperature (F) 21.7 23.6 27.0 30.5 35.7 41.2 46.9 48.1 44.0 36.8 27.0 21.8 33.7
Highest Mean Min. Temperature (F) 29.6 29.1 33.5 34.4 40.2 45.3 52.0 52.7 48.5 43.0 31.7 28.4 52.7
Year Highest Occurred 1994 1992 1992 1990 1993 1992 1998 1977 1995 1988 1987 1980 1977
Lowest Mean Min. Temperature (F) 10.8 15.1 21.2 24.1 32.0 37.7 42.7 42.9 38.5 32.3 15.8 14.0 10.8
Year Lowest Occurred 1979 1989 1971 1972 1999 1976 1986 1975 1972 1984 1985 1983 1979
Mean Precipitation (in.) 12.47 8.95 7.35 5.69 4.32 3.98 1.86 2.20 4.16 6.45 12.84 13.88 84.15
Highest Precipitation (in.) 27.18 19.34 14.51 11.38 8.65 7.64 5.96 7.17 9.66 16.39 21.13 28.56 28.56
Year Highest Occurred 1972 1972 1997 1981 1984 1981 1983 1975 2000 1985 1995 1975 1975
Lowest Precipitation (in.) 0.97 0.68 1.21 1.66 1.60 0.92 0.20 0.31 0.29 0.51 2.19 1.73 0.20
Year Lowest Occurred 1985 1993 1992 1999 1992 1982 1985 1988 1991 1987 1979 1985 1985
Heating Degree Days (F) 1214. 1031. 1015. 844. 679. 469. 291. 263. 408. 697. 1030. 1215. 9156.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 0. 12. 14. 9. 0. 0. 0. 35.

Western Regional Climate Center, wrcc@dri.edu