STEHEKIN 3 NW, WASHINGTON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 32.8 38.3 47.7 58.9 68.7 75.9 83.6 83.3 72.9 57.4 40.8 32.9 57.8
Highest Mean Max. Temperature (F) 39.0 42.8 55.7 64.3 74.0 84.2 94.1 89.9 81.5 62.9 47.4 37.3 94.1
Year Highest Occurred 1994 1991 1992 1977 1995 1992 1985 1986 1998 1987 1987 1999 1985
Lowest Mean Max. Temperature (F) 24.6 32.6 40.6 52.0 63.4 69.7 75.2 75.1 65.4 53.2 32.2 26.1 24.6
Year Lowest Occurred 1979 1989 1971 1972 1996 1981 1983 1976 1978 1990 1985 1983 1979
Mean Temperature (F) 28.4 32.3 39.0 47.6 56.1 63.0 69.3 69.1 59.8 47.6 35.8 29.0 48.1
Highest Mean Temperature (F) 34.1 36.6 44.8 52.3 60.9 69.9 76.3 74.6 66.9 51.6 41.3 33.7 76.3
Year Highest Occurred 1994 1992 1992 1994 1993 1992 1985 1977 1998 1988 1987 1999 1985
Lowest Mean Temperature (F) 18.4 25.5 33.8 42.1 52.0 58.3 63.1 63.4 54.9 44.4 27.3 21.1 18.4
Year Lowest Occurred 1979 1989 1971 1972 1996 1981 1983 1995 1972 1990 1985 1983 1979
Mean Min. Temperature (F) 23.9 26.2 30.2 36.3 43.4 50.0 54.9 54.9 46.7 37.7 30.8 25.1 38.3
Highest Mean Min. Temperature (F) 29.5 31.3 33.8 40.6 48.0 55.5 59.1 59.6 52.2 41.6 35.7 30.1 59.6
Year Highest Occurred 1981 1992 1992 1994 1993 1992 1998 1977 1998 1988 1989 1999 1977
Lowest Mean Min. Temperature (F) 12.2 18.4 26.0 31.5 40.3 46.7 50.9 50.1 43.1 34.9 22.3 16.0 12.2
Year Lowest Occurred 1979 1989 1976 1982 1974 1976 1983 1995 1983 1981 1985 1983 1979
Mean Precipitation (in.) 6.38 4.27 2.88 1.49 1.04 0.90 0.63 0.82 1.17 2.94 6.50 7.17 36.19
Highest Precipitation (in.) 12.01 7.97 5.80 4.26 2.46 3.27 2.58 2.25 3.56 8.05 13.13 14.31 14.31
Year Highest Occurred 1982 1982 1997 1989 1998 1992 1983 1976 1978 1990 1990 1996 1996
Lowest Precipitation (in.) 0.59 0.33 0.30 0.00 0.15 0.11 0.00 0.00 0.00 0.00 1.53 1.40 0.00
Year Lowest Occurred 1985 1993 1996 1999 1983 1989 1984 2000 1976 1987 1979 1985 1999
Heating Degree Days (F) 1136. 918. 809. 521. 284. 118. 43. 34. 201. 541. 876. 1116. 6597.
Cooling Degree Days (F) 0. 0. 0. 0. 6. 56. 174. 161. 45. 0. 0. 0. 442.

Western Regional Climate Center, wrcc@dri.edu