COTTONWOOD 2 WSW, IDAHO

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 34.8 39.7 46.1 53.6 61.6 69.2 77.7 79.0 69.8 57.2 41.4 34.9 55.4
Highest Mean Max. Temperature (F) 41.1 48.0 54.7 62.8 69.4 76.1 85.5 84.1 79.1 66.9 51.1 41.9 85.5
Year Highest Occurred 1986 1992 1992 1987 1992 1986 1985 1971 1990 1988 1999 1980 1985
Lowest Mean Max. Temperature (F) 24.1 29.5 39.8 43.4 56.2 63.4 66.3 71.2 60.2 50.6 29.0 26.0 24.1
Year Lowest Occurred 1979 1989 1977 1975 1977 1991 1993 1976 1985 1984 1985 1983 1979
Mean Temperature (F) 28.9 32.9 38.0 44.2 51.4 58.6 65.9 66.7 58.3 47.8 35.2 28.9 46.4
Highest Mean Temperature (F) 35.1 40.6 45.1 51.3 57.4 65.0 73.0 71.2 66.4 56.1 42.9 35.9 73.0
Year Highest Occurred 1994 1991 1992 1987 1992 1986 1985 1986 1990 1988 1999 1980 1985
Lowest Mean Temperature (F) 17.3 22.8 31.9 36.6 47.5 53.6 56.2 61.5 50.9 42.3 23.4 19.9 17.3
Year Lowest Occurred 1979 1989 1976 1975 1996 1991 1993 1976 1985 1984 1985 1990 1979
Mean Min. Temperature (F) 22.9 26.1 29.8 34.7 41.2 47.9 54.0 54.3 46.7 38.3 28.9 22.9 37.3
Highest Mean Min. Temperature (F) 29.6 33.6 35.4 39.8 46.1 53.8 60.5 59.0 53.7 45.2 36.2 29.8 60.5
Year Highest Occurred 1994 1991 1992 1987 1993 1986 1985 1986 1990 1988 1976 1980 1985
Lowest Mean Min. Temperature (F) 10.5 16.1 23.8 29.8 36.9 43.7 46.1 49.3 41.5 33.9 17.8 12.9 10.5
Year Lowest Occurred 1979 1989 1976 1975 1999 1991 1993 1980 1985 1984 1985 1990 1979
Mean Precipitation (in.) 1.88 1.45 1.71 2.39 2.99 2.39 1.53 1.09 1.25 1.50 2.12 1.77 22.07
Highest Precipitation (in.) 4.55 4.02 3.85 4.55 7.29 4.27 4.11 2.56 3.36 3.50 4.29 5.27 7.29
Year Highest Occurred 1982 1986 1984 1978 1990 1993 1993 1999 1998 1975 1973 1977 1990
Lowest Precipitation (in.) 0.53 0.29 0.62 0.55 0.42 0.64 0.26 0.01 0.02 0.00 0.26 0.09 0.00
Year Lowest Occurred 1977 1991 1994 1977 1974 1974 1996 1991 1990 1987 1976 1976 1987
Heating Degree Days (F) 1122. 899. 839. 625. 424. 220. 92. 79. 246. 536. 896. 1120. 7098.
Cooling Degree Days (F) 0. 0. 0. 0. 2. 26. 119. 131. 43. 1. 0. 0. 322.

Western Regional Climate Center, wrcc@dri.edu