POTLATCH 3 NNE, IDAHO

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 35.5 41.9 47.7 56.1 65.0 72.7 81.4 81.9 72.1 59.7 43.6 36.0 57.8
Highest Mean Max. Temperature (F) 43.4 50.2 53.9 64.6 70.0 83.6 89.0 91.5 81.9 67.9 49.3 43.4 60.6
Year Highest Occurred 1983 1963 1986 1987 1966 1961 1985 1961 1963 1988 1981 1979 1963
Lowest Mean Max. Temperature (F) 21.5 31.0 41.3 49.3 59.7 66.7 74.8 75.2 62.8 54.8 29.6 25.9 54.5
Year Lowest Occurred 1979 1989 1971 1970 1974 1971 1986 1975 1985 1969 1985 1978 1985
Mean Temperature (F) 28.2 33.7 38.2 44.4 51.2 57.8 62.8 62.6 54.8 45.6 36.1 29.1 45.4
Highest Mean Temperature (F) 35.9 40.4 43.8 50.6 54.1 64.7 67.3 70.1 63.5 51.8 40.0 37.0 48.1
Year Highest Occurred 1981 1963 1986 1987 1987 1961 1961 1961 1963 1988 1963 1979 1963
Lowest Mean Temperature (F) 11.4 21.6 33.1 39.5 46.5 52.4 58.8 57.1 50.0 42.3 21.9 17.2 41.5
Year Lowest Occurred 1979 1989 1971 1975 1974 1976 1986 1975 1971 1984 1985 1978 1985
Mean Min. Temperature (F) 20.9 25.5 28.6 32.6 37.3 42.8 44.2 43.3 37.3 31.5 28.5 22.2 32.9
Highest Mean Min. Temperature (F) 29.6 33.6 33.6 37.8 41.4 46.4 47.7 48.7 45.0 38.1 33.3 31.0 35.5
Year Highest Occurred 1981 1961 1986 1980 1980 1963 1970 1961 1963 1963 1989 1966 1963
Lowest Mean Min. Temperature (F) 1.2 12.1 21.2 28.4 33.3 36.7 40.5 38.3 28.6 24.3 14.1 8.5 28.5
Year Lowest Occurred 1979 1989 1985 1977 1974 1976 1969 1969 1975 1974 1985 1978 1985
Mean Precipitation (in.) 3.08 2.50 2.42 2.05 2.16 1.82 0.91 1.12 1.32 1.62 3.03 3.28 25.31
Highest Precipitation (in.) 7.89 5.55 4.18 4.22 4.96 4.80 2.41 4.29 3.39 4.56 7.44 6.79 33.44
Year Highest Occurred 1970 1961 1984 1978 1990 1967 1975 1989 1985 1990 1973 1973 1975
Lowest Precipitation (in.) 0.25 0.45 0.90 0.33 0.25 0.49 0.00 0.00 0.00 0.00 0.67 0.51 18.00
Year Lowest Occurred 1985 1964 1964 1973 1964 1986 1985 1967 1990 1987 1976 1985 1987
Heating Degree Days (F) 1141. 876. 831. 618. 428. 227. 102. 137. 320. 601. 867. 1113. 7261.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 11. 33. 63. 14. 0. 0. 0. 121.

Western Regional Climate Center, wrcc@dri.edu