TETONIA EXPERIMENT STN, IDAHO

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 27.0 33.1 39.8 49.2 60.6 70.5 78.7 77.9 68.6 55.6 37.8 27.9 52.2
Highest Mean Max. Temperature (F) 36.1 40.8 48.7 60.1 69.4 80.0 83.5 82.6 75.9 66.6 51.7 34.8 83.5
Year Highest Occurred 1981 1991 1992 1987 1992 1988 1989 1994 1990 1988 1999 1980 1989
Lowest Mean Max. Temperature (F) 16.2 25.6 33.2 40.3 52.4 61.2 68.3 71.6 60.0 47.9 29.5 20.6 16.2
Year Lowest Occurred 1979 1985 1976 1975 1975 1998 1993 1980 1986 1984 1985 1990 1979
Mean Temperature (F) 15.3 20.7 27.9 37.2 46.7 54.9 61.5 60.4 51.3 40.4 26.3 16.1 38.2
Highest Mean Temperature (F) 22.8 27.5 35.1 44.5 52.7 61.0 65.9 63.9 56.7 49.3 37.6 26.0 65.9
Year Highest Occurred 1981 1995 1986 1987 1992 1988 1989 2000 1990 1988 1999 1980 1989
Lowest Mean Temperature (F) 3.6 12.0 18.9 28.7 40.3 49.2 54.0 55.2 46.2 33.6 17.8 5.5 3.6
Year Lowest Occurred 1979 1985 1976 1975 1975 1998 1993 1980 1971 1984 1979 1978 1979
Mean Min. Temperature (F) 3.5 8.2 16.0 25.1 32.8 39.2 44.3 42.8 34.0 25.1 14.7 4.2 24.2
Highest Mean Min. Temperature (F) 12.4 17.4 23.5 29.4 36.9 43.3 48.3 47.1 40.3 32.0 24.7 17.1 48.3
Year Highest Occurred 1983 1986 1986 1990 1987 1997 1989 2000 1998 1988 1998 1980 1989
Lowest Mean Min. Temperature (F) -9.1 -1.7 4.5 17.1 28.3 34.4 39.7 37.6 29.1 19.0 3.2 -9.8 -9.8
Year Lowest Occurred 1979 1984 1976 1975 1975 1993 1993 1975 1975 1980 1979 1978 1978
Mean Precipitation (in.) 2.00 1.19 1.28 1.36 2.61 1.67 1.29 1.26 1.38 1.43 1.48 1.66 18.61
Highest Precipitation (in.) 4.85 2.77 5.08 2.40 5.79 5.41 3.43 3.43 3.45 4.43 3.01 5.29 5.79
Year Highest Occurred 2000 1999 1989 1971 1981 1998 1987 1973 1985 1994 1983 1996 1981
Lowest Precipitation (in.) 0.35 0.05 0.27 0.43 0.59 0.03 0.00 0.10 0.00 0.06 0.02 0.19 0.00
Year Lowest Occurred 1992 1991 1978 1980 1979 1988 1988 1992 1987 1978 1976 1986 1988
Heating Degree Days (F) 1542. 1241. 1151. 836. 568. 311. 147. 167. 412. 765. 1163. 1518. 9821.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 7. 38. 24. 2. 0. 0. 0. 71.

Western Regional Climate Center, wrcc@dri.edu