MOUNT SHASTA, CALIFORNIA

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 43.4 47.7 51.4 58.5 67.5 76.0 84.4 83.3 76.2 65.0 49.8 43.3 62.2
Highest Mean Max. Temperature (F) 51.4 56.2 58.9 68.7 74.7 81.5 88.7 91.1 84.1 73.7 58.1 50.7 64.4
Year Highest Occurred 1961 1988 1988 1987 1973 1961 1973 1967 1974 1965 1976 1989 1987
Lowest Mean Max. Temperature (F) 38.2 38.7 44.5 45.1 58.1 68.2 77.8 74.8 66.0 56.2 41.6 36.3 59.8
Year Lowest Occurred 1969 1969 1975 1967 1977 1980 1983 1976 1986 1984 1973 1971 1982
Mean Temperature (F) 34.5 38.1 40.7 45.9 53.5 61.2 67.2 66.1 59.9 51.0 40.1 34.6 49.4
Highest Mean Temperature (F) 40.4 44.3 46.2 52.5 58.5 66.0 71.1 71.5 65.2 56.8 45.4 39.6 50.9
Year Highest Occurred 1986 1963 1986 1987 1973 1977 1973 1967 1974 1987 1967 1962 1981
Lowest Mean Temperature (F) 30.1 32.3 37.1 36.7 46.7 55.1 61.7 61.3 52.7 44.9 34.0 27.9 47.6
Year Lowest Occurred 1989 1989 1975 1967 1977 1980 1983 1976 1986 1984 1985 1990 1982
Mean Min. Temperature (F) 25.5 28.5 29.9 33.2 39.5 46.4 50.0 48.8 43.5 36.9 30.4 25.9 36.5
Highest Mean Min. Temperature (F) 32.2 35.0 34.2 37.0 43.9 51.1 53.5 52.5 47.5 40.5 35.1 31.1 38.0
Year Highest Occurred 1986 1963 1972 1990 1963 1977 1973 1971 1967 1987 1967 1969 1981
Lowest Mean Min. Temperature (F) 19.9 21.5 26.2 28.2 35.2 42.0 45.2 44.8 39.3 33.5 24.2 16.0 34.0
Year Lowest Occurred 1989 1990 1988 1967 1977 1980 1989 1989 1986 1984 1985 1990 1989
Mean Precipitation (in.) 6.31 5.16 5.12 2.63 1.54 0.82 0.35 0.48 0.82 2.40 5.78 5.61 37.02
Highest Precipitation (in.) 21.18 17.08 14.90 8.08 9.30 3.56 1.69 2.55 3.84 9.71 17.31 13.78 70.95
Year Highest Occurred 1978 1986 1989 1965 1990 1982 1985 1976 1986 1962 1984 1987 1983
Lowest Precipitation (in.) 0.19 0.21 0.43 0.08 0.09 0.00 0.00 0.00 0.00 0.00 0.83 0.07 14.21
Year Lowest Occurred 1984 1971 1988 1985 1975 1973 1989 1987 1988 1978 1986 1989 1976
Heating Degree Days (F) 946. 753. 753. 573. 361. 149. 50. 61. 187. 434. 747. 942. 5956.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 35. 118. 95. 34. 0. 0. 0. 282.

Western Regional Climate Center, wrcc@dri.edu