FERN RIDGE DAM, OREGON

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 46.3 50.9 55.4 59.8 66.2 73.3 80.3 80.9 75.5 64.7 52.6 46.3 62.7
Highest Mean Max. Temperature (F) 52.2 56.6 60.9 66.7 70.9 78.5 87.4 88.0 83.2 73.2 56.6 50.0 65.1
Year Highest Occurred 1984 1968 1986 1987 1987 1987 1985 1986 1974 1987 1989 1966 1987
Lowest Mean Max. Temperature (F) 38.6 44.5 50.1 53.9 59.6 66.9 74.1 75.9 69.8 60.3 45.7 40.4 60.6
Year Lowest Occurred 1979 1989 1971 1963 1962 1980 1963 1968 1978 1969 1985 1990 1964
Mean Temperature (F) 39.5 42.8 46.0 49.4 54.7 61.1 66.1 66.7 62.2 53.9 45.4 40.1 52.3
Highest Mean Temperature (F) 43.3 48.1 51.2 54.7 58.3 65.0 71.1 71.2 66.4 59.0 48.8 44.0 53.9
Year Highest Occurred 1975 1963 1986 1989 1987 1986 1985 1967 1974 1987 1965 1966 1987
Lowest Mean Temperature (F) 31.6 35.5 42.1 45.0 51.2 57.3 62.4 63.4 58.6 50.1 38.4 33.3 50.7
Year Lowest Occurred 1979 1989 1971 1975 1977 1971 1963 1975 1970 1971 1985 1985 1971
Mean Min. Temperature (F) 32.7 34.6 36.5 38.9 43.1 48.7 51.8 52.4 48.8 43.1 38.1 33.8 41.9
Highest Mean Min. Temperature (F) 37.9 39.6 42.1 42.9 46.1 52.9 54.8 56.0 52.6 48.4 42.5 38.4 43.8
Year Highest Occurred 1978 1983 1983 1989 1983 1969 1985 1990 1990 1988 1965 1973 1983
Lowest Mean Min. Temperature (F) 24.6 26.4 33.1 35.4 40.7 45.0 49.8 48.5 44.2 39.1 31.1 25.9 40.1
Year Lowest Occurred 1979 1989 1969 1967 1977 1976 1976 1980 1970 1971 1985 1985 1985
Mean Precipitation (in.) 6.45 5.05 4.53 2.63 1.85 1.19 0.39 0.74 1.31 2.94 6.92 7.65 41.65
Highest Precipitation (in.) 12.87 11.94 9.10 6.15 3.36 3.09 2.30 4.57 3.61 6.83 17.09 18.37 54.21
Year Highest Occurred 1970 1986 1983 1963 1963 1985 1987 1968 1986 1979 1973 1964 1983
Lowest Precipitation (in.) 0.36 1.31 0.65 0.54 0.47 0.09 0.00 0.00 0.00 0.13 1.63 1.18 28.21
Year Lowest Occurred 1985 1964 1965 1985 1982 1976 1977 1988 1975 1987 1976 1976 1985
Heating Degree Days (F) 791. 622. 589. 468. 319. 135. 43. 49. 114. 344. 588. 772. 4834.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 18. 78. 101. 30. 0. 0. 0. 227.

Western Regional Climate Center, wrcc@dri.edu