FORT HALL INDIAN AGENCY, IDAHO

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 31.6 38.8 47.3 57.8 67.5 77.4 86.2 84.5 74.5 62.5 45.2 33.4 58.9
Highest Mean Max. Temperature (F) 40.5 49.8 57.2 68.5 74.5 86.3 90.8 89.8 82.5 72.3 52.4 40.6 61.9
Year Highest Occurred 1981 1963 1986 1987 1969 1988 1964 1967 1990 1988 1965 1980 1990
Lowest Mean Max. Temperature (F) 20.7 27.8 36.7 46.6 61.6 71.8 81.3 76.8 66.0 53.9 34.5 23.3 54.7
Year Lowest Occurred 1979 1985 1964 1975 1978 1984 1986 1968 1986 1984 1985 1985 1984
Mean Temperature (F) 21.7 28.3 35.7 44.5 53.5 62.2 69.3 67.2 57.9 46.9 34.5 23.7 45.5
Highest Mean Temperature (F) 30.8 37.9 44.3 50.9 58.8 69.0 72.6 71.5 64.3 54.6 40.1 31.0 47.5
Year Highest Occurred 1983 1963 1986 1987 1976 1988 1988 1961 1990 1988 1965 1980 1981
Lowest Mean Temperature (F) 10.8 15.3 24.9 37.2 49.7 58.1 65.9 62.6 52.3 41.8 25.8 12.1 41.2
Year Lowest Occurred 1979 1964 1985 1975 1978 1984 1986 1968 1965 1984 1985 1985 1985
Mean Min. Temperature (F) 11.8 17.6 24.0 31.2 39.3 47.0 52.3 49.9 41.2 31.2 23.8 14.0 31.9
Highest Mean Min. Temperature (F) 23.0 26.0 31.3 35.5 44.4 51.7 56.2 55.3 46.1 38.7 28.7 22.7 34.1
Year Highest Occurred 1983 1963 1986 1990 1976 1988 1975 1983 1963 1975 1973 1977 1983
Lowest Mean Min. Temperature (F) 0.9 1.0 12.5 25.9 36.0 44.3 50.1 46.6 36.0 25.8 16.6 0.9 27.3
Year Lowest Occurred 1979 1964 1985 1970 1982 1984 1981 1978 1965 1966 1979 1985 1985
Mean Precipitation (in.) 0.85 0.88 1.10 1.08 1.51 1.12 0.71 0.84 0.89 1.03 1.07 0.93 12.01
Highest Precipitation (in.) 2.46 1.97 2.80 2.78 4.75 3.09 2.68 4.04 2.75 2.98 2.53 2.37 17.45
Year Highest Occurred 1980 1986 1983 1976 1981 1984 1984 1968 1961 1971 1988 1964 1980
Lowest Precipitation (in.) 0.08 0.04 0.03 0.00 0.17 0.20 0.00 0.02 0.00 0.00 0.00 0.03 6.89
Year Lowest Occurred 1961 1977 1965 1969 1969 1974 1990 1964 1987 1988 1976 1962 1966
Heating Degree Days (F) 1342. 1028. 908. 615. 357. 128. 11. 48. 237. 561. 915. 1280. 7430.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 44. 144. 116. 24. 0. 0. 0. 328.

Western Regional Climate Center, wrcc@dri.edu