DONNER MEMORIAL ST PK, CALIFORNIA

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 39.6 42.1 45.1 51.7 60.8 71.1 79.3 79.2 72.2 61.6 47.4 39.7 57.5
Highest Mean Max. Temperature (F) 46.9 53.1 52.5 61.2 69.7 77.8 83.7 85.3 78.5 71.8 58.0 49.0 85.3
Year Highest Occurred 1986 1991 1997 1987 1992 2000 1994 1981 1974 1988 1995 1976 1981
Lowest Mean Max. Temperature (F) 34.5 35.0 37.7 40.7 49.0 64.7 74.5 72.1 62.9 52.1 36.4 33.4 33.4
Year Lowest Occurred 1979 1998 1991 1975 1977 1980 1983 1976 1985 1984 1994 1971 1971
Mean Temperature (F) 27.0 29.3 33.2 38.6 46.0 54.0 60.2 59.9 53.6 44.9 34.4 27.5 42.4
Highest Mean Temperature (F) 34.7 36.8 37.6 44.9 52.6 59.1 64.3 63.1 57.3 50.7 41.7 33.8 64.3
Year Highest Occurred 1986 1991 1986 1987 1992 2000 1996 1981 1981 1988 1995 1981 1996
Lowest Mean Temperature (F) 21.1 22.4 27.2 28.8 39.1 48.9 55.3 54.0 48.8 39.1 26.2 20.7 20.7
Year Lowest Occurred 1982 1990 1977 1975 1977 1980 1983 1976 1985 1971 1994 1990 1990
Mean Min. Temperature (F) 14.4 16.5 21.2 25.4 31.2 36.9 41.1 40.5 35.0 28.1 21.4 15.3 27.3
Highest Mean Min. Temperature (F) 22.7 23.2 27.0 29.8 35.5 41.8 45.8 43.3 40.9 32.4 26.4 25.2 45.8
Year Highest Occurred 1995 1992 1978 1990 1992 1977 1984 1992 1998 1983 1981 1981 1984
Lowest Mean Min. Temperature (F) 6.1 6.9 13.5 16.9 25.9 32.9 36.2 35.9 29.5 22.5 16.0 5.9 5.9
Year Lowest Occurred 1989 1990 1977 1975 1974 1974 1983 1976 1971 1971 1994 1990 1990
Mean Precipitation (in.) 6.89 6.72 5.83 2.50 1.55 0.76 0.47 0.59 1.11 2.18 4.92 5.48 39.00
Highest Precipitation (in.) 19.79 16.41 20.89 8.79 4.91 2.45 3.93 3.09 4.93 7.31 16.65 20.20 20.89
Year Highest Occurred 1997 1986 1995 1982 1996 1997 1974 1976 1982 1975 1981 1996 1995
Lowest Precipitation (in.) 0.16 0.02 0.46 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.43 0.00 0.00
Year Lowest Occurred 1991 1988 1988 1985 1985 1994 2000 1994 1995 1995 1992 1989 1985
Heating Degree Days (F) 1179. 1001. 987. 794. 589. 335. 167. 183. 344. 625. 917. 1163. 8284.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 4. 18. 19. 3. 0. 0. 0. 44.

Western Regional Climate Center, wrcc@dri.edu