GRAYS RIVER HATCHERY, WASHINGTON

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 46.8 50.5 53.7 57.4 63.1 67.9 72.7 73.6 70.9 62.3 52.4 46.7 59.8
Highest Mean Max. Temperature (F) 54.6 57.7 59.0 63.0 67.3 73.0 78.2 81.0 78.8 69.1 58.2 51.1 62.2
Year Highest Occurred 1981 1968 1965 1989 1963 1961 1985 1967 1974 1987 1976 1979 1987
Lowest Mean Max. Temperature (F) 37.9 43.2 48.5 52.1 57.6 61.7 67.8 68.1 66.5 56.5 43.4 39.7 57.5
Year Lowest Occurred 1969 1989 1971 1972 1962 1971 1986 1980 1986 1984 1985 1990 1971
Mean Temperature (F) 39.5 42.1 44.3 47.3 52.4 57.1 60.9 61.4 58.2 51.3 44.5 40.1 49.9
Highest Mean Temperature (F) 45.2 48.7 48.0 50.7 56.1 60.2 64.0 64.9 62.5 54.9 47.6 45.3 51.5
Year Highest Occurred 1981 1963 1986 1989 1983 1970 1985 1967 1963 1965 1965 1979 1987
Lowest Mean Temperature (F) 31.8 34.2 40.5 43.1 48.8 53.8 58.5 57.7 55.0 47.4 35.9 33.5 48.2
Year Lowest Occurred 1969 1989 1976 1975 1974 1976 1986 1973 1970 1984 1985 1990 1975
Mean Min. Temperature (F) 32.2 33.7 34.9 37.2 41.6 46.4 49.2 49.2 45.6 40.1 36.6 33.4 40.0
Highest Mean Min. Temperature (F) 37.6 39.9 39.1 40.7 45.0 51.1 51.4 52.1 50.5 46.1 41.7 39.4 42.5
Year Highest Occurred 1983 1963 1983 1990 1983 1969 1983 1963 1963 1963 1965 1979 1963
Lowest Mean Min. Temperature (F) 23.1 25.2 30.2 32.1 38.7 42.8 44.8 44.0 42.4 35.1 28.3 27.3 37.5
Year Lowest Occurred 1979 1989 1969 1975 1977 1976 1969 1984 1975 1983 1985 1990 1985
Mean Precipitation (in.) 16.35 13.16 11.71 7.38 4.96 3.48 2.05 2.60 4.74 9.59 16.07 17.33 109.42
Highest Precipitation (in.) 30.32 25.48 19.33 13.51 9.98 7.90 6.79 7.86 10.53 25.42 29.26 32.69 136.06
Year Highest Occurred 1967 1961 1971 1981 1984 1981 1983 1968 1970 1975 1983 1975 1968
Lowest Precipitation (in.) 1.27 3.70 1.83 2.68 1.12 0.92 0.00 0.17 0.53 0.61 3.76 5.33 75.69
Year Lowest Occurred 1985 1973 1965 1977 1982 1987 1984 1970 1975 1987 1976 1985 1985
Heating Degree Days (F) 791. 641. 642. 531. 391. 237. 136. 135. 211. 425. 615. 772. 5527.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 0. 9. 24. 7. 0. 0. 0. 40.

Western Regional Climate Center, wrcc@dri.edu