CLATSKANIE, OREGON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 44.8 49.5 54.3 58.7 64.0 68.2 73.5 74.5 71.4 61.6 50.3 44.6 59.6
Highest Mean Max. Temperature (F) 50.9 57.1 61.6 63.9 71.2 74.6 82.0 79.6 77.5 70.2 56.2 47.9 82.0
Year Highest Occurred 1986 1992 1992 1989 1992 1992 1985 1986 1989 1987 1995 1999 1985
Lowest Mean Max. Temperature (F) 36.3 42.4 48.3 53.2 59.0 62.0 68.8 68.2 65.5 56.2 44.0 38.6 36.3
Year Lowest Occurred 1979 1989 1971 1972 1974 1971 1993 1975 1996 1975 1985 1983 1979
Mean Temperature (F) 38.1 41.2 44.9 48.3 53.5 57.8 62.1 62.6 58.7 50.5 42.6 38.1 49.9
Highest Mean Temperature (F) 43.2 46.8 49.5 52.1 57.8 62.2 66.3 65.8 62.5 55.0 47.9 41.7 66.3
Year Highest Occurred 1994 1991 1992 1989 1993 1992 1985 1986 1995 1988 1995 1999 1985
Lowest Mean Temperature (F) 29.5 33.8 39.8 43.6 49.4 52.7 58.7 58.3 54.3 47.1 35.1 32.4 29.5
Year Lowest Occurred 1979 1989 1971 1972 1977 1971 1982 1973 1996 1996 1985 1990 1979
Mean Min. Temperature (F) 31.3 32.9 35.4 37.9 42.9 47.4 50.7 50.7 46.0 39.4 34.9 31.5 40.1
Highest Mean Min. Temperature (F) 35.9 37.1 38.6 41.9 47.1 51.0 55.9 53.9 51.6 45.9 40.3 35.5 55.9
Year Highest Occurred 1994 1991 1983 1990 1993 1998 1998 1997 1990 1988 1998 1999 1998
Lowest Mean Min. Temperature (F) 22.7 25.3 31.4 33.8 39.4 43.5 47.9 47.6 42.6 36.4 26.3 23.0 22.7
Year Lowest Occurred 1979 1989 1971 1982 1977 1971 1977 1973 1971 1987 1985 1985 1979
Mean Precipitation (in.) 8.28 6.75 5.94 4.08 2.69 1.83 0.84 0.96 2.22 4.08 8.84 8.98 55.49
Highest Precipitation (in.) 16.03 16.74 11.02 9.54 5.47 3.83 3.02 4.03 7.43 8.41 18.39 17.33 18.39
Year Highest Occurred 1990 1999 1971 1991 1984 1984 1983 1977 1978 1997 1973 1996 1973
Lowest Precipitation (in.) 0.38 0.68 1.06 1.26 0.34 0.39 0.00 0.04 0.01 0.24 0.92 2.55 0.00
Year Lowest Occurred 1985 1993 1992 1977 1992 1987 1984 1986 1975 1987 1976 1976 1984
Heating Degree Days (F) 836. 667. 624. 502. 357. 222. 122. 107. 202. 450. 672. 836. 5597.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 6. 31. 33. 14. 0. 0. 0. 84.

Western Regional Climate Center, wrcc@dri.edu