HART MOUNTAIN REFUGE, OREGON

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 39.2 41.9 45.0 52.9 62.4 71.5 81.2 80.0 71.4 60.9 46.1 39.6 57.7
Highest Mean Max. Temperature (F) 46.4 49.8 53.5 62.9 69.8 80.3 86.0 85.5 77.8 70.3 57.1 48.1 60.2
Year Highest Occurred 1986 1988 1978 1977 1966 1961 1968 1967 1990 1988 1976 1980 1988
Lowest Mean Max. Temperature (F) 33.5 32.0 39.2 41.1 53.2 65.7 75.5 71.9 61.9 51.1 36.9 33.2 54.1
Year Lowest Occurred 1979 1989 1975 1967 1977 1971 1987 1976 1986 1984 1985 1972 1982
Mean Temperature (F) 28.7 31.5 33.6 39.5 47.3 55.3 62.5 61.8 54.2 45.8 35.2 29.0 43.7
Highest Mean Temperature (F) 37.8 38.5 41.7 47.2 51.8 62.7 67.6 66.9 59.2 52.1 41.4 34.9 45.9
Year Highest Occurred 1986 1963 1978 1987 1973 1961 1985 1961 1963 1988 1976 1980 1986
Lowest Mean Temperature (F) 21.3 21.6 27.6 31.7 41.6 50.7 56.8 56.4 47.6 39.7 27.6 21.8 41.3
Year Lowest Occurred 1979 1989 1962 1975 1977 1980 1983 1976 1985 1969 1985 1990 1982
Mean Min. Temperature (F) 18.0 21.0 22.2 26.0 32.2 39.1 43.9 43.6 37.0 30.6 24.2 18.4 29.7
Highest Mean Min. Temperature (F) 29.1 28.5 30.0 31.9 37.3 45.1 49.8 50.0 43.4 34.0 29.3 25.2 32.5
Year Highest Occurred 1986 1963 1986 1987 1963 1961 1985 1961 1963 1965 1970 1973 1986
Lowest Mean Min. Temperature (F) 9.1 11.2 15.8 20.9 28.2 33.8 37.8 39.9 31.4 27.2 17.7 8.1 27.7
Year Lowest Occurred 1979 1989 1962 1970 1965 1978 1983 1975 1965 1966 1979 1990 1964
Mean Precipitation (in.) 0.87 0.74 1.22 1.34 1.43 1.34 0.43 0.61 0.82 0.97 1.16 1.13 12.06
Highest Precipitation (in.) 2.79 1.93 3.74 6.30 3.77 4.51 1.82 2.50 2.29 4.18 3.22 4.50 19.03
Year Highest Occurred 1969 1986 1983 1978 1981 1975 1975 1968 1986 1962 1981 1983 1981
Lowest Precipitation (in.) 0.17 0.03 0.24 0.28 0.21 0.06 0.00 0.00 0.00 0.00 0.00 0.14 5.38
Year Lowest Occurred 1984 1988 1965 1977 1976 1973 1968 1981 1987 1988 1976 1967 1976
Heating Degree Days (F) 1125. 938. 973. 765. 549. 301. 126. 144. 336. 595. 894. 1116. 7862.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 10. 48. 45. 12. 0. 0. 0. 115.

Western Regional Climate Center, wrcc@dri.edu