GRANGEVILLE, IDAHO

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 38.1 44.0 50.4 57.7 64.9 72.3 81.6 82.9 72.8 59.9 45.2 37.9 59.0
Highest Mean Max. Temperature (F) 43.9 52.3 59.8 65.8 72.9 79.5 89.6 89.4 82.9 69.2 56.4 44.9 89.6
Year Highest Occurred 1983 1991 1992 1987 1992 1974 1985 1971 1990 1988 1999 1979 1985
Lowest Mean Max. Temperature (F) 25.6 33.6 44.5 49.0 59.8 66.5 69.5 76.7 64.1 53.8 33.1 30.4 25.6
Year Lowest Occurred 1979 1989 1977 1975 1978 1980 1993 1975 1985 1995 1985 1983 1979
Mean Temperature (F) 31.2 35.3 40.3 46.3 53.3 60.1 66.9 67.3 58.3 48.1 37.7 31.1 48.0
Highest Mean Temperature (F) 37.8 42.1 46.2 52.1 59.2 65.1 72.1 72.7 64.7 55.0 45.8 37.8 72.7
Year Highest Occurred 1994 1991 1992 1987 1993 1986 1985 1971 1990 1988 1999 1980 1971
Lowest Mean Temperature (F) 18.2 24.8 35.2 40.0 49.2 55.8 58.6 62.7 52.4 43.7 26.7 22.7 18.2
Year Lowest Occurred 1979 1989 1976 1975 1977 1991 1993 1985 1985 1971 1985 1990 1979
Mean Min. Temperature (F) 24.3 26.6 30.2 34.8 41.6 47.9 52.2 51.7 43.7 36.2 30.1 24.2 37.0
Highest Mean Min. Temperature (F) 32.1 31.8 34.7 38.9 45.8 52.0 57.1 55.9 49.1 40.9 35.2 30.9 57.1
Year Highest Occurred 1994 1991 1986 1980 1993 1982 1998 1971 1998 1988 1999 1980 1998
Lowest Mean Min. Temperature (F) 10.9 16.0 25.2 30.8 38.1 44.7 47.7 46.2 38.7 31.6 20.2 14.3 10.9
Year Lowest Occurred 1979 1989 1985 1972 1974 1991 1993 1987 1971 1971 1985 1985 1979
Mean Precipitation (in.) 1.45 1.30 2.37 2.82 3.63 2.84 1.66 1.16 1.62 1.78 1.81 1.50 23.94
Highest Precipitation (in.) 3.10 3.31 4.33 5.58 6.30 5.74 5.12 3.88 5.24 4.82 3.88 4.46 6.30
Year Highest Occurred 1975 1986 1984 1997 1990 1984 1997 1995 1985 1975 1998 1996 1990
Lowest Precipitation (in.) 0.38 0.23 0.83 0.45 1.75 0.65 0.09 0.02 0.11 0.00 0.55 0.28 0.00
Year Lowest Occurred 1991 1977 1998 1973 1992 1977 1996 1981 1991 1987 2000 1976 1987
Heating Degree Days (F) 1049. 832. 766. 562. 366. 176. 65. 61. 233. 525. 821. 1052. 6508.
Cooling Degree Days (F) 0. 0. 0. 0. 2. 29. 124. 132. 31. 0. 0. 0. 318.

Western Regional Climate Center, wrcc@dri.edu