EL CAPITAN DAM, CALIFORNIA

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 68.8 70.4 70.3 74.7 78.6 85.4 92.7 93.2 89.8 84.0 75.7 69.5 79.4
Highest Mean Max. Temperature (F) 75.9 76.5 78.3 83.3 87.3 93.2 97.6 97.8 98.4 90.1 81.1 76.2 81.7
Year Highest Occurred 1986 1977 1988 1989 1984 1981 1985 1969 1979 1967 1977 1979 1989
Lowest Mean Max. Temperature (F) 62.5 62.3 62.5 64.6 70.3 75.4 87.1 87.1 80.9 77.5 71.4 61.2 77.5
Year Lowest Occurred 1979 1969 1973 1967 1980 1965 1987 1974 1976 1972 1985 1971 1975
Mean Temperature (F) 55.0 56.5 57.3 61.0 64.7 69.9 75.3 76.4 73.9 68.4 61.0 55.6 64.6
Highest Mean Temperature (F) 59.7 61.8 61.5 66.5 69.4 75.1 78.8 80.6 79.3 72.5 64.7 60.2 66.5
Year Highest Occurred 1961 1963 1972 1989 1984 1981 1984 1967 1984 1965 1967 1977 1981
Lowest Mean Temperature (F) 50.3 52.3 52.8 53.6 59.7 64.8 69.8 71.6 68.3 64.9 57.3 49.7 62.2
Year Lowest Occurred 1973 1969 1973 1967 1980 1965 1987 1974 1986 1975 1984 1971 1975
Mean Min. Temperature (F) 41.1 42.6 44.3 47.2 50.7 54.4 57.8 59.6 57.9 52.8 46.2 41.6 49.7
Highest Mean Min. Temperature (F) 46.9 48.3 49.6 52.3 53.6 58.4 62.1 63.8 62.8 57.5 49.7 47.6 51.9
Year Highest Occurred 1980 1968 1978 1990 1966 1990 1984 1967 1983 1987 1967 1977 1983
Lowest Mean Min. Temperature (F) 34.6 36.3 39.3 42.5 47.2 50.2 52.4 55.0 53.2 47.8 42.1 38.1 46.8
Year Lowest Occurred 1972 1985 1985 1967 1986 1985 1987 1987 1986 1975 1975 1971 1985
Mean Precipitation (in.) 2.50 2.64 2.97 1.30 0.42 0.14 0.07 0.20 0.38 0.73 1.98 2.39 15.72
Highest Precipitation (in.) 9.65 8.85 10.31 6.25 2.45 1.60 0.68 2.06 3.21 2.93 7.09 9.85 31.17
Year Highest Occurred 1980 1980 1983 1965 1977 1972 1984 1977 1976 1974 1965 1966 1978
Lowest Precipitation (in.) 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 6.56
Year Lowest Occurred 1976 1967 1972 1962 1984 1989 1989 1989 1984 1988 1980 1989 1968
Heating Degree Days (F) 314. 245. 247. 162. 73. 24. 0. 0. 8. 31. 141. 299. 1544.
Cooling Degree Days (F) 0. 7. 9. 42. 64. 171. 319. 353. 275. 137. 21. 7. 1405.

Western Regional Climate Center, wrcc@dri.edu