DEER FLAT DAM, IDAHO

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 36.8 45.6 55.7 64.5 72.8 80.9 88.4 87.0 77.5 65.7 50.0 38.1 63.6
Highest Mean Max. Temperature (F) 44.5 53.3 61.7 73.8 78.8 87.5 93.0 92.8 84.2 74.0 54.4 44.4 66.1
Year Highest Occurred 1967 1963 1986 1987 1966 1961 1985 1967 1990 1988 1965 1977 1966
Lowest Mean Max. Temperature (F) 24.5 28.5 50.0 55.5 66.8 75.8 83.9 81.0 68.2 60.6 38.8 21.3 59.5
Year Lowest Occurred 1979 1989 1964 1975 1977 1964 1986 1968 1985 1969 1985 1985 1985
Mean Temperature (F) 28.9 36.1 43.8 51.1 59.0 66.7 72.7 71.3 62.3 51.6 40.2 30.3 51.2
Highest Mean Temperature (F) 37.3 42.9 48.5 57.2 63.8 71.7 77.0 75.5 69.2 58.4 44.4 37.3 53.0
Year Highest Occurred 1970 1963 1986 1987 1987 1961 1985 1967 1990 1988 1966 1973 1987
Lowest Mean Temperature (F) 15.1 20.0 37.7 44.9 54.3 63.5 66.8 67.3 55.4 47.0 28.0 11.4 46.1
Year Lowest Occurred 1979 1989 1985 1975 1977 1976 1983 1985 1985 1984 1985 1985 1985
Mean Min. Temperature (F) 20.9 26.5 31.9 37.8 45.2 52.4 57.0 55.5 47.0 37.5 30.4 22.3 38.7
Highest Mean Min. Temperature (F) 30.4 33.2 37.7 43.0 49.9 56.9 61.8 59.3 54.2 43.8 36.1 30.1 40.5
Year Highest Occurred 1970 1983 1983 1990 1987 1988 1975 1986 1990 1963 1983 1973 1981
Lowest Mean Min. Temperature (F) 5.6 11.5 24.5 33.3 41.7 48.7 49.0 49.9 41.7 32.7 17.2 1.4 32.6
Year Lowest Occurred 1979 1989 1985 1970 1977 1976 1983 1985 1970 1985 1985 1985 1985
Mean Precipitation (in.) 1.09 0.83 1.05 0.94 0.87 0.89 0.27 0.49 0.62 0.67 1.13 1.11 9.96
Highest Precipitation (in.) 3.41 2.81 3.34 3.33 1.92 2.38 1.12 2.36 2.61 1.75 2.22 2.86 15.73
Year Highest Occurred 1970 1986 1983 1978 1980 1963 1983 1965 1986 1962 1988 1981 1983
Lowest Precipitation (in.) 0.16 0.12 0.11 0.09 0.22 0.06 0.00 0.00 0.00 0.00 0.21 0.00 5.60
Year Lowest Occurred 1985 1964 1963 1987 1975 1989 1986 1973 1990 1988 1969 1989 1966
Heating Degree Days (F) 1119. 809. 657. 417. 199. 52. 6. 15. 151. 415. 744. 1076. 5660.
Cooling Degree Days (F) 0. 0. 0. 0. 13. 103. 245. 210. 70. 0. 0. 0. 641.

Western Regional Climate Center, wrcc@dri.edu