IRON MOUNTAIN, CALIFORNIA

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 65.9 71.4 77.4 85.5 94.4 104.4 109.0 107.3 101.0 89.2 75.0 65.9 87.2
Highest Mean Max. Temperature (F) 72.8 77.5 87.2 93.6 103.1 109.7 112.9 112.4 106.7 96.3 83.2 75.1 112.9
Year Highest Occurred 1981 1991 1972 1989 1997 1981 1996 1995 1979 1988 1995 1980 1996
Lowest Mean Max. Temperature (F) 56.0 65.0 69.3 77.5 85.9 98.2 104.0 103.3 93.7 80.6 67.0 59.5 56.0
Year Lowest Occurred 1979 1998 1991 1975 1977 1982 1982 1983 1985 1972 1994 1984 1979
Mean Temperature (F) 54.7 59.4 64.6 71.9 80.4 90.0 95.0 93.4 87.0 75.2 62.5 54.5 74.1
Highest Mean Temperature (F) 60.1 64.3 72.5 80.0 88.9 95.1 98.3 98.0 91.4 81.9 68.9 61.4 98.3
Year Highest Occurred 1986 1991 1972 1989 1997 1981 1996 1995 1995 1988 1995 1980 1996
Lowest Mean Temperature (F) 47.2 54.2 57.4 64.5 73.4 85.1 90.5 90.1 79.9 68.9 55.5 49.4 47.2
Year Lowest Occurred 1979 1979 1991 1975 1977 1991 1993 1983 1985 1971 1994 1990 1979
Mean Min. Temperature (F) 43.5 47.3 51.7 58.2 66.4 75.6 81.0 79.4 73.0 61.1 49.9 43.1 60.9
Highest Mean Min. Temperature (F) 48.3 52.3 57.7 66.3 74.6 80.6 83.8 83.5 77.7 67.4 54.6 47.7 83.8
Year Highest Occurred 1986 1995 1972 1989 1997 1981 1971 1995 1997 1988 1995 1980 1971
Lowest Mean Min. Temperature (F) 38.3 42.0 45.4 51.5 60.8 70.0 74.7 75.8 66.1 55.9 41.6 37.2 37.2
Year Lowest Occurred 1979 1975 1991 1975 1977 1991 1993 1976 1986 1971 1993 1993 1993
Mean Precipitation (in.) 0.58 0.47 0.51 0.11 0.11 0.05 0.28 0.41 0.29 0.30 0.21 0.46 3.78
Highest Precipitation (in.) 3.15 2.01 3.18 0.72 0.55 1.24 1.75 2.10 2.45 1.26 1.08 2.43 3.18
Year Highest Occurred 1993 1998 1992 1999 1987 1972 1979 2000 1976 1972 1985 1984 1992
Lowest Precipitation (in.) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Year Lowest Occurred 1999 1997 1999 2000 2000 2000 2000 1997 1996 1999 1999 2000 1999
Heating Degree Days (F) 326. 176. 118. 35. 5. 0. 0. 0. 0. 13. 146. 337. 1156.
Cooling Degree Days (F) 6. 18. 104. 240. 481. 749. 931. 880. 659. 328. 69. 11. 4476.

Western Regional Climate Center, wrcc@dri.edu