MOUNT HAMILTON, CALIFORNIA

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 49.4 49.6 50.4 55.8 63.4 72.0 78.2 77.9 73.8 65.3 53.9 49.9 61.6
Highest Mean Max. Temperature (F) 56.1 58.1 59.8 66.6 70.6 79.4 86.1 82.9 80.9 75.6 63.8 58.5 86.1
Year Highest Occurred 1976 1995 1972 1989 1992 1981 1988 1981 1988 1988 1976 1980 1988
Lowest Mean Max. Temperature (F) 43.7 40.5 40.5 47.1 49.1 63.2 71.0 70.0 64.0 58.9 43.5 40.5 40.5
Year Lowest Occurred 1979 1998 1991 1975 1998 1998 1987 1976 1985 1972 1994 1987 1998
Mean Temperature (F) 43.5 43.3 43.7 47.9 55.1 63.7 70.7 70.4 66.0 58.1 47.5 43.6 54.5
Highest Mean Temperature (F) 49.1 51.2 51.6 58.8 62.8 69.1 77.7 75.7 72.6 66.6 56.9 52.2 77.7
Year Highest Occurred 1986 1991 1972 1989 1992 1981 1988 1998 1991 1988 1976 1980 1988
Lowest Mean Temperature (F) 38.1 36.4 35.5 39.7 45.6 56.5 63.5 63.7 55.4 51.6 37.6 35.4 35.4
Year Lowest Occurred 1993 1998 1991 1975 1998 1998 1987 1976 1986 1984 1994 1971 1971
Mean Min. Temperature (F) 37.5 36.9 37.0 40.0 46.8 55.3 63.1 62.8 58.2 50.8 41.0 37.3 47.2
Highest Mean Min. Temperature (F) 43.3 44.3 43.8 50.9 55.0 62.4 69.3 69.6 65.4 58.0 49.9 45.8 69.6
Year Highest Occurred 1986 1991 1986 1989 1992 2000 1988 1998 1991 1999 1976 1980 1998
Lowest Mean Min. Temperature (F) 31.3 32.3 30.5 32.2 37.4 49.8 56.0 57.4 46.7 44.0 31.6 29.9 29.9
Year Lowest Occurred 1993 1998 1991 1975 1977 1998 1987 1976 1986 1984 1994 1971 1971
Mean Precipitation (in.) 4.42 4.02 3.90 1.77 0.95 0.24 0.05 0.09 0.44 1.51 3.23 3.11 23.73
Highest Precipitation (in.) 11.93 12.13 12.05 4.94 4.69 1.12 0.50 0.95 1.73 3.59 9.76 11.63 12.13
Year Highest Occurred 1998 1998 1995 1974 1998 1995 1980 1976 1986 1979 1983 1996 1998
Lowest Precipitation (in.) 0.16 0.19 0.14 0.20 0.00 0.00 0.00 0.00 0.00 0.00 0.34 0.04 0.00
Year Lowest Occurred 1991 1988 1994 1977 1992 1996 2000 1998 1996 1995 1980 1989 1992
Heating Degree Days (F) 669. 608. 645. 520. 346. 130. 37. 30. 112. 272. 533. 664. 4566.
Cooling Degree Days (F) 0. 0. 0. 7. 39. 89. 212. 196. 142. 56. 6. 0. 747.

Western Regional Climate Center, wrcc@dri.edu