HART MOUNTAIN REFUGE, OREGON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 39.8 42.0 46.4 53.9 62.4 71.9 81.3 80.6 72.3 60.8 46.0 40.0 58.1
Highest Mean Max. Temperature (F) 46.4 52.8 55.5 62.9 73.5 80.1 86.6 85.3 77.8 70.3 57.1 48.1 86.6
Year Highest Occurred 1986 1995 1994 1977 1992 2000 1994 1994 1991 1988 1976 1980 1994
Lowest Mean Max. Temperature (F) 33.4 32.0 39.2 42.0 53.2 65.7 71.9 71.9 61.9 51.1 36.4 33.2 32.0
Year Lowest Occurred 1993 1989 1975 1975 1977 1971 1993 1976 1986 1984 1994 1972 1989
Mean Temperature (F) 29.0 31.1 34.6 40.0 47.1 54.7 62.0 61.6 54.3 45.2 34.3 28.7 43.6
Highest Mean Temperature (F) 36.2 39.8 41.7 45.9 54.1 61.5 66.7 65.9 58.3 51.8 41.0 34.6 66.7
Year Highest Occurred 1986 1995 1978 1987 1992 2000 1985 1971 1991 1988 1976 1980 1985
Lowest Mean Temperature (F) 21.1 21.0 28.1 31.5 41.3 50.0 53.6 56.3 46.6 38.7 26.2 21.3 21.0
Year Lowest Occurred 1979 1989 1975 1975 1977 1984 1993 1976 1985 1984 1985 1990 1989
Mean Min. Temperature (F) 18.2 20.2 22.7 26.1 31.8 37.5 42.7 42.6 36.2 29.5 22.5 17.3 28.9
Highest Mean Min. Temperature (F) 26.0 26.8 29.9 30.4 36.4 42.9 48.0 47.3 40.7 33.6 28.8 23.1 48.0
Year Highest Occurred 1986 1995 1978 1994 1997 2000 1985 1971 1998 1992 1999 1996 1985
Lowest Mean Min. Temperature (F) 8.7 9.9 17.0 21.1 27.8 33.2 35.2 37.7 31.1 26.2 12.1 7.2 7.2
Year Lowest Occurred 1979 1989 1975 1975 1974 1978 1993 1993 1985 1984 1993 1990 1990
Mean Precipitation (in.) 0.92 0.91 1.42 1.54 1.69 1.17 0.46 0.50 0.79 1.06 1.20 1.06 12.72
Highest Precipitation (in.) 3.04 2.76 3.74 6.30 4.92 4.51 1.82 1.87 2.29 3.42 3.22 4.50 6.30
Year Highest Occurred 1993 1999 1983 1978 1998 1975 1975 1983 1986 1975 1981 1983 1978
Lowest Precipitation (in.) 0.12 0.03 0.45 0.28 0.21 0.06 0.00 0.00 0.00 0.00 0.00 0.11 0.00
Year Lowest Occurred 1994 1988 1997 1977 1976 1973 1991 2000 1999 1988 1976 1999 1991
Heating Degree Days (F) 1116. 949. 944. 750. 554. 319. 148. 144. 333. 615. 923. 1127. 7922.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 11. 55. 38. 11. 0. 0. 0. 115.

Western Regional Climate Center, wrcc@dri.edu