WINCHESTER, IDAHO

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 35.2 39.7 44.7 52.2 59.6 67.3 76.1 77.8 68.6 56.7 41.4 34.9 54.5
Highest Mean Max. Temperature (F) 43.0 49.0 53.7 61.1 65.1 75.0 84.5 85.8 77.0 66.9 50.7 42.4 85.8
Year Highest Occurred 1983 1992 1992 1987 1992 1986 1985 1971 1990 1988 1999 1980 1971
Lowest Mean Max. Temperature (F) 25.3 29.5 38.5 44.1 52.5 60.9 63.1 70.1 60.1 49.8 30.3 26.6 25.3
Year Lowest Occurred 1979 1989 1977 1975 1996 1991 1993 1993 1985 1995 1985 1983 1979
Mean Temperature (F) 27.5 31.1 35.4 41.6 48.2 54.8 61.0 61.7 53.8 44.6 33.7 27.3 43.4
Highest Mean Temperature (F) 35.8 39.7 42.9 48.1 53.1 59.8 66.7 66.0 61.2 51.3 41.6 34.0 66.7
Year Highest Occurred 1994 1991 1986 1987 1993 1992 1998 1986 1990 1988 1999 1980 1998
Lowest Mean Temperature (F) 14.0 19.1 28.6 34.7 43.9 50.7 53.2 56.6 47.6 39.7 23.2 18.5 14.0
Year Lowest Occurred 1979 1989 1976 1975 1977 1991 1993 1980 1971 1971 1985 1978 1979
Mean Min. Temperature (F) 19.7 22.4 26.1 31.0 36.7 42.2 45.9 45.6 39.0 32.5 25.9 19.7 32.2
Highest Mean Min. Temperature (F) 30.7 31.2 33.4 35.0 41.6 47.1 53.0 50.2 46.6 35.7 32.7 26.3 53.0
Year Highest Occurred 1994 1991 1986 1987 1993 1992 1998 1983 1998 1988 1989 1991 1998
Lowest Mean Min. Temperature (F) 2.6 8.7 18.0 25.2 33.6 39.2 41.1 39.6 31.2 26.5 16.1 9.3 2.6
Year Lowest Occurred 1979 1989 1976 1975 1977 1976 1981 1987 1971 1971 1985 1978 1979
Mean Precipitation (in.) 1.94 1.69 2.46 2.76 3.18 2.18 1.45 1.24 1.44 1.87 2.51 1.99 24.71
Highest Precipitation (in.) 4.76 4.03 4.37 5.02 5.36 4.43 3.91 3.66 3.84 5.23 5.19 5.36 5.36
Year Highest Occurred 1975 1986 1972 1996 1980 1981 1993 1975 2000 1975 1986 1975 1980
Lowest Precipitation (in.) 0.55 0.47 0.74 0.79 1.20 0.87 0.06 0.02 0.07 0.00 0.78 0.50 0.00
Year Lowest Occurred 1992 1998 1994 1977 1992 1986 2000 1974 1999 1987 1976 1985 1987
Heating Degree Days (F) 1164. 951. 919. 702. 522. 312. 164. 153. 348. 633. 940. 1168. 7976.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 3. 39. 50. 12. 0. 0. 0. 104.

Western Regional Climate Center, wrcc@dri.edu