TETONIA EXPERIMENT STN, IDAHO

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 26.0 32.6 38.1 47.9 60.1 70.0 79.4 77.8 67.2 55.2 38.3 27.7 51.7
Highest Mean Max. Temperature (F) 36.2 40.2 47.1 60.1 67.1 80.0 84.6 83.7 75.5 66.6 44.8 34.9 55.3
Year Highest Occurred 1981 1963 1986 1987 1969 1988 1966 1969 1990 1988 1965 1980 1988
Lowest Mean Max. Temperature (F) 16.3 23.6 30.7 37.6 52.4 63.2 73.0 70.9 56.6 47.4 29.5 19.7 48.6
Year Lowest Occurred 1979 1964 1964 1970 1975 1964 1982 1968 1965 1969 1985 1990 1984
Mean Temperature (F) 14.3 19.9 26.0 36.1 46.4 54.8 62.1 60.2 50.9 40.0 26.8 16.0 37.8
Highest Mean Temperature (F) 23.3 31.4 34.9 44.1 51.0 61.0 65.9 64.1 57.6 48.8 32.9 26.6 40.5
Year Highest Occurred 1981 1963 1986 1990 1969 1988 1989 1961 1990 1988 1965 1980 1981
Lowest Mean Temperature (F) 4.1 9.6 17.3 27.0 40.8 51.1 58.2 55.4 43.9 33.1 18.3 6.2 34.7
Year Lowest Occurred 1979 1964 1964 1970 1975 1963 1986 1980 1965 1984 1979 1978 1984
Mean Min. Temperature (F) 2.5 7.1 13.7 24.2 32.7 39.6 44.8 42.6 34.5 24.7 15.3 4.2 23.8
Highest Mean Min. Temperature (F) 12.8 22.6 23.8 29.4 36.9 43.9 48.3 48.4 41.9 31.9 20.9 18.3 26.3
Year Highest Occurred 1967 1963 1972 1990 1987 1977 1989 1961 1963 1963 1965 1980 1963
Lowest Mean Min. Temperature (F) -8.1 -4.5 2.0 16.3 29.0 36.4 41.3 38.0 29.6 18.2 4.0 -8.6 20.1
Year Lowest Occurred 1979 1964 1969 1970 1982 1979 1972 1985 1975 1984 1979 1978 1985
Mean Precipitation (in.) 1.54 1.21 1.03 1.20 2.28 1.81 1.36 1.31 1.54 1.31 1.36 1.42 17.37
Highest Precipitation (in.) 3.96 2.34 5.08 2.40 5.79 4.20 3.43 3.93 4.20 3.44 3.01 2.91 27.23
Year Highest Occurred 1989 1986 1989 1971 1981 1967 1987 1968 1961 1967 1983 1981 1983
Lowest Precipitation (in.) 0.00 0.12 0.26 0.43 0.59 0.03 0.00 0.14 0.00 0.06 0.02 0.19 11.25
Year Lowest Occurred 1961 1977 1963 1980 1979 1988 1988 1985 1987 1978 1976 1986 1988
Heating Degree Days (F) 1572. 1263. 1209. 867. 577. 311. 115. 170. 429. 775. 1146. 1519. 9953.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 5. 26. 21. 6. 0. 0. 0. 58.

Western Regional Climate Center, wrcc@dri.edu