MT WILSON NO 2, CALIFORNIA

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 52.9 53.4 55.0 60.7 67.9 77.0 82.1 81.6 77.0 68.5 59.5 53.8 65.8
Highest Mean Max. Temperature (F) 60.5 61.6 66.7 70.4 77.5 83.4 86.8 86.4 82.6 76.0 67.5 60.6 86.8
Year Highest Occurred 1986 1991 1972 1989 1997 1974 1972 1998 1979 1999 1995 1980 1972
Lowest Mean Max. Temperature (F) 44.3 43.8 45.3 47.6 57.6 69.4 77.4 74.5 67.4 59.5 51.0 45.0 43.8
Year Lowest Occurred 1979 1998 1973 1975 1977 1998 1987 1976 1985 1972 1994 1971 1998
Mean Temperature (F) 44.4 44.7 45.7 50.7 57.6 66.9 72.7 72.3 67.7 59.6 50.5 45.3 56.5
Highest Mean Temperature (F) 51.6 52.0 55.8 59.7 68.6 72.6 76.7 76.9 73.4 68.4 59.7 51.9 76.9
Year Highest Occurred 1986 1991 1972 1989 1997 1994 1996 1998 1979 1978 1995 1980 1998
Lowest Mean Temperature (F) 36.0 38.0 36.8 38.3 47.2 59.9 67.8 65.2 59.0 49.7 42.4 35.6 35.6
Year Lowest Occurred 1979 1998 1973 1975 1977 1998 1987 1976 1985 1972 1994 1971 1971
Mean Min. Temperature (F) 35.9 35.9 36.3 40.6 47.3 56.7 63.2 63.0 58.4 50.6 41.4 36.7 47.2
Highest Mean Min. Temperature (F) 42.9 44.2 44.9 49.1 59.7 63.6 67.9 67.8 64.3 63.7 51.8 45.2 67.9
Year Highest Occurred 1994 1995 1972 1989 1997 1994 1996 1994 1995 1978 1995 1977 1996
Lowest Mean Min. Temperature (F) 27.8 30.8 28.3 29.0 36.7 50.3 58.2 55.8 50.5 39.9 33.8 26.1 26.1
Year Lowest Occurred 1979 1990 1973 1975 1977 1998 1987 1976 1985 1972 1994 1971 1971
Mean Precipitation (in.) 7.96 9.53 8.38 2.34 0.97 0.26 0.08 0.29 1.01 1.54 3.23 4.78 40.37
Highest Precipitation (in.) 28.22 30.71 25.15 9.84 10.84 1.81 1.71 3.44 11.17 9.19 12.67 15.84 30.71
Year Highest Occurred 1995 1980 1983 1983 1998 1993 1992 1983 1976 1987 1982 1984 1980
Lowest Precipitation (in.) 0.00 0.04 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00
Year Lowest Occurred 1976 1972 1997 1979 1997 1996 2000 1999 1999 1999 1992 2000 1976
Heating Degree Days (F) 640. 570. 594. 452. 304. 79. 7. 14. 76. 241. 445. 617. 4039.
Cooling Degree Days (F) 0. 0. 12. 23. 74. 133. 244. 240. 157. 72. 10. 4. 969.

Western Regional Climate Center, wrcc@dri.edu