FOLSOM DAM, CALIFORNIA

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 53.4 60.0 63.7 70.2 79.3 87.6 94.2 93.2 87.6 77.8 63.3 54.0 73.7
Highest Mean Max. Temperature (F) 59.2 67.1 70.1 78.3 84.6 94.2 99.2 99.7 93.9 84.1 69.5 61.6 76.3
Year Highest Occurred 1986 1988 1972 1977 1973 1981 1988 1967 1984 1978 1986 1976 1988
Lowest Mean Max. Temperature (F) 49.1 53.4 59.5 57.0 71.3 80.8 88.2 85.6 80.5 71.5 57.4 46.0 71.1
Year Lowest Occurred 1972 1969 1975 1967 1977 1965 1987 1976 1986 1984 1972 1963 1963
Mean Temperature (F) 45.6 50.9 53.8 58.5 65.2 72.1 77.2 76.5 72.5 65.3 54.2 46.3 61.5
Highest Mean Temperature (F) 51.2 55.9 59.1 64.6 69.7 77.9 82.2 81.3 77.5 70.1 58.7 51.0 63.6
Year Highest Occurred 1986 1963 1986 1987 1987 1981 1988 1967 1984 1987 1967 1977 1988
Lowest Mean Temperature (F) 41.5 46.4 50.0 49.5 59.5 66.9 72.2 72.0 67.1 60.4 49.9 40.0 59.4
Year Lowest Occurred 1972 1969 1973 1967 1971 1965 1987 1976 1986 1975 1972 1972 1975
Mean Min. Temperature (F) 37.7 41.6 43.9 46.6 51.1 56.5 60.2 59.8 57.4 52.6 44.9 38.5 49.2
Highest Mean Min. Temperature (F) 45.0 47.0 50.0 51.8 55.9 61.5 65.2 62.8 61.0 58.2 49.6 44.7 51.0
Year Highest Occurred 1978 1963 1978 1989 1987 1981 1988 1967 1984 1987 1981 1983 1981
Lowest Mean Min. Temperature (F) 31.7 36.5 39.3 41.0 46.8 52.7 56.2 55.6 53.6 48.6 40.1 32.5 46.7
Year Lowest Occurred 1963 1971 1977 1975 1971 1980 1987 1985 1965 1971 1975 1972 1975
Mean Precipitation (in.) 4.33 3.45 3.87 1.89 0.49 0.20 0.11 0.12 0.48 1.55 3.95 3.47 23.91
Highest Precipitation (in.) 13.49 11.68 11.34 5.52 3.42 1.01 2.14 1.15 2.63 9.77 9.15 9.05 49.97
Year Highest Occurred 1969 1986 1983 1983 1990 1984 1974 1976 1989 1962 1983 1964 1983
Lowest Precipitation (in.) 0.38 0.00 0.61 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.30 0.00 8.30
Year Lowest Occurred 1984 1984 1966 1987 1985 1990 1990 1990 1990 1978 1980 1989 1976
Heating Degree Days (F) 601. 395. 351. 234. 81. 15. 0. 0. 9. 89. 328. 580. 2683.
Cooling Degree Days (F) 0. 0. 0. 39. 87. 228. 378. 357. 234. 99. 0. 0. 1422.

Western Regional Climate Center, wrcc@dri.edu