WHITEHORSE RANCH, OREGON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 40.5 45.9 52.0 58.9 67.1 76.1 85.7 84.8 76.2 65.8 50.1 41.5 62.1
Highest Mean Max. Temperature (F) 48.5 57.3 60.2 68.9 78.4 82.3 90.2 90.6 83.0 75.5 58.4 48.6 90.6
Year Highest Occurred 1994 1995 1992 1987 1992 1986 1994 1981 1990 1988 1976 1980 1981
Lowest Mean Max. Temperature (F) 30.1 34.8 44.3 47.6 59.5 70.0 76.6 73.9 66.0 57.9 41.5 35.4 30.1
Year Lowest Occurred 1984 1993 1975 1975 1977 1971 1993 1976 1985 1984 1994 1972 1984
Mean Temperature (F) 28.9 33.5 38.9 44.6 52.0 59.5 67.6 67.0 58.3 49.0 36.7 29.2 47.1
Highest Mean Temperature (F) 36.1 42.7 43.6 51.7 59.7 65.1 74.6 72.7 64.4 56.1 43.6 36.4 74.6
Year Highest Occurred 1998 1995 1978 1990 1992 1986 1985 1994 1990 1988 1995 1996 1985
Lowest Mean Temperature (F) 17.7 23.2 32.1 35.5 46.3 55.2 59.6 59.0 51.9 43.3 30.6 21.6 17.7
Year Lowest Occurred 1984 1989 1976 1975 1977 1984 1993 1976 1985 1984 1982 1990 1984
Mean Min. Temperature (F) 17.3 21.1 25.7 30.2 36.9 42.9 49.5 49.1 40.4 32.1 23.2 16.8 32.1
Highest Mean Min. Temperature (F) 25.4 28.1 31.1 36.7 41.9 47.8 60.0 55.2 47.2 36.6 29.6 26.6 60.0
Year Highest Occurred 1995 1995 1993 1990 1994 1986 1985 1994 1998 1988 1998 1996 1985
Lowest Mean Min. Temperature (F) 5.3 10.2 18.5 23.5 30.8 38.0 42.6 43.8 35.0 28.2 15.3 7.6 5.3
Year Lowest Occurred 1984 1989 1976 1975 1975 1984 1993 1975 1971 1974 1993 1990 1984
Mean Precipitation (in.) 0.63 0.70 0.87 0.92 0.93 0.55 0.21 0.68 0.54 0.57 0.67 0.71 7.98
Highest Precipitation (in.) 1.80 2.38 2.47 2.22 2.73 1.77 1.16 3.47 2.17 2.04 2.45 3.40 3.47
Year Highest Occurred 1996 1987 1986 1991 1998 1998 1982 1983 1971 1992 1981 1983 1983
Lowest Precipitation (in.) 0.00 0.05 0.00 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.00
Year Lowest Occurred 1992 1991 1982 1977 1992 1994 1996 1997 1999 1995 1976 1976 1992
Heating Degree Days (F) 1118. 881. 810. 614. 409. 195. 65. 80. 232. 498. 851. 1112. 6865.
Cooling Degree Days (F) 0. 0. 0. 0. 6. 30. 146. 140. 30. 1. 0. 0. 353.

Western Regional Climate Center, wrcc@dri.edu