OAK KNOLL RS #2, CALIFORNIA

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 54.9 58.6 61.4 68.0 77.2 86.3 93.8 93.1 86.6 76.1 61.8 54.5 72.7
Highest Mean Max. Temperature (F) 60.8 66.0 68.2 75.9 84.0 92.2 97.7 100.5 94.1 82.3 69.0 62.7 74.4
Year Highest Occurred 1984 1988 1988 1966 1973 1977 1967 1967 1974 1978 1976 1989 1966
Lowest Mean Max. Temperature (F) 50.0 49.4 56.5 53.3 67.3 79.8 85.4 83.8 77.1 68.6 55.3 47.8 69.3
Year Lowest Occurred 1973 1969 1983 1967 1977 1980 1983 1976 1986 1984 1973 1972 1983
Mean Temperature (F) 42.2 45.6 48.3 53.0 60.5 68.4 73.6 72.7 66.7 58.1 48.2 42.4 56.6
Highest Mean Temperature (F) 46.2 51.1 52.8 58.7 65.7 74.1 77.4 75.5 70.6 62.2 52.6 46.2 58.6
Year Highest Occurred 1984 1963 1986 1985 1973 1977 1988 1967 1967 1987 1967 1969 1981
Lowest Mean Temperature (F) 38.3 40.5 45.2 43.7 55.6 63.9 68.0 68.1 61.7 54.1 44.3 37.0 55.3
Year Lowest Occurred 1963 1966 1982 1967 1977 1980 1983 1976 1986 1971 1985 1972 1982
Mean Min. Temperature (F) 29.4 32.6 35.1 38.0 43.8 50.5 53.3 52.2 46.7 40.1 34.6 30.2 40.5
Highest Mean Min. Temperature (F) 36.0 39.3 40.7 42.3 47.5 55.9 58.4 55.5 51.2 45.3 39.9 37.5 43.3
Year Highest Occurred 1978 1963 1978 1990 1981 1977 1988 1990 1981 1987 1973 1983 1981
Lowest Mean Min. Temperature (F) 22.8 26.6 30.8 32.2 38.3 46.7 45.5 47.9 39.8 33.8 30.4 21.7 37.7
Year Lowest Occurred 1963 1966 1964 1964 1965 1965 1966 1970 1965 1966 1969 1990 1965
Mean Precipitation (in.) 5.45 4.54 3.60 1.50 0.50 0.16 0.06 0.15 0.46 1.58 3.89 4.28 26.17
Highest Precipitation (in.) 12.76 26.73 12.05 5.19 3.78 1.39 0.70 1.97 4.11 7.40 10.44 13.00 61.88
Year Highest Occurred 1978 1986 1983 1963 1990 1967 1974 1965 1989 1962 1983 1983 1983
Lowest Precipitation (in.) 0.27 0.02 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 8.17
Year Lowest Occurred 1976 1971 1988 1990 1985 1986 1990 1990 1988 1978 1986 1989 1976
Heating Degree Days (F) 707. 543. 518. 371. 164. 30. 6. 0. 51. 219. 504. 701. 3814.
Cooling Degree Days (F) 0. 0. 0. 11. 24. 132. 273. 242. 102. 5. 0. 0. 789.

Western Regional Climate Center, wrcc@dri.edu