OWYHEE DAM, OREGON

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 38.2 45.7 55.4 64.1 73.8 83.4 92.6 90.9 79.8 67.0 50.6 39.5 65.1
Highest Mean Max. Temperature (F) 46.0 54.4 61.4 73.9 80.2 93.2 97.2 97.8 87.8 77.2 55.1 46.8 67.7
Year Highest Occurred 1967 1963 1986 1987 1966 1961 1985 1967 1990 1988 1965 1977 1966
Lowest Mean Max. Temperature (F) 27.2 33.5 49.5 54.0 66.1 77.8 85.5 82.7 71.4 61.5 41.6 25.0 61.3
Year Lowest Occurred 1979 1989 1985 1975 1977 1984 1983 1976 1985 1969 1985 1985 1985
Mean Temperature (F) 29.9 36.3 43.8 50.7 58.6 66.7 73.0 71.8 62.9 52.4 40.4 31.0 51.5
Highest Mean Temperature (F) 37.8 43.8 49.7 56.8 63.2 73.6 77.5 77.6 69.9 61.2 44.5 39.1 53.5
Year Highest Occurred 1967 1963 1986 1990 1969 1986 1990 1961 1990 1988 1965 1977 1961
Lowest Mean Temperature (F) 16.7 23.2 38.3 43.9 53.5 61.8 68.3 66.0 57.2 48.6 31.6 15.8 47.9
Year Lowest Occurred 1979 1989 1976 1975 1977 1976 1983 1976 1985 1969 1985 1985 1985
Mean Min. Temperature (F) 21.5 26.8 32.2 37.3 43.4 49.9 53.4 52.8 45.9 37.8 30.0 22.6 37.8
Highest Mean Min. Temperature (F) 29.6 33.1 38.0 41.4 46.9 56.4 60.5 59.7 52.0 45.1 34.6 31.4 40.1
Year Highest Occurred 1967 1963 1986 1990 1969 1988 1990 1961 1990 1988 1983 1977 1988
Lowest Mean Min. Temperature (F) 6.2 12.9 26.6 33.2 39.5 44.4 49.2 48.3 40.3 34.3 21.5 6.5 34.4
Year Lowest Occurred 1979 1989 1965 1982 1974 1976 1981 1980 1971 1976 1985 1985 1985
Mean Precipitation (in.) 0.98 0.75 0.83 0.85 0.91 1.19 0.34 0.54 0.54 0.57 0.92 1.08 9.50
Highest Precipitation (in.) 2.84 2.76 2.61 3.37 1.88 3.20 1.33 2.70 1.61 2.08 2.40 3.53 17.30
Year Highest Occurred 1969 1986 1983 1978 1987 1965 1983 1979 1980 1982 1981 1983 1983
Lowest Precipitation (in.) 0.06 0.06 0.04 0.04 0.16 0.05 0.00 0.00 0.00 0.00 0.07 0.00 4.88
Year Lowest Occurred 1966 1965 1969 1961 1975 1974 1990 1988 1987 1988 1969 1989 1966
Heating Degree Days (F) 1088. 804. 657. 429. 208. 75. 8. 21. 140. 391. 738. 1054. 5613.
Cooling Degree Days (F) 0. 0. 0. 0. 10. 126. 256. 231. 77. 0. 0. 0. 700.

Western Regional Climate Center, wrcc@dri.edu