WILLIAMS FORK DAM, COLORADO

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 28.6 33.5 42.5 51.6 62.5 73.4 78.9 77.5 70.3 58.9 41.9 31.5 54.3
Highest Mean Max. Temperature (F) 40.1 39.8 49.1 59.1 67.5 79.5 82.1 80.6 76.5 63.3 48.3 44.0 82.1
Year Highest Occurred 1981 1995 1999 1992 1994 1994 1998 1995 1998 1988 1999 1980 1998
Lowest Mean Max. Temperature (F) 19.7 27.0 36.5 43.1 55.8 67.6 74.4 75.2 64.6 50.3 30.2 24.6 19.7
Year Lowest Occurred 1979 1984 1988 1984 1995 1982 1992 1987 1982 1984 2000 1988 1979
Mean Temperature (F) 12.7 16.5 27.0 36.1 45.5 54.6 60.1 58.7 50.7 40.3 26.8 16.2 37.1
Highest Mean Temperature (F) 21.3 24.2 33.1 40.9 49.7 59.4 64.4 62.7 56.7 43.2 32.4 27.2 64.4
Year Highest Occurred 1981 1995 1999 1981 1994 1994 1998 1983 1998 1988 1998 1980 1998
Lowest Mean Temperature (F) 3.5 8.5 19.8 29.6 42.0 51.1 56.7 55.7 46.5 35.8 17.6 9.4 3.5
Year Lowest Occurred 1984 1974 1988 1984 1975 1982 1995 1978 1971 1982 2000 1978 1984
Mean Min. Temperature (F) -3.3 -0.6 11.4 20.5 28.5 35.7 41.3 39.8 31.1 21.7 11.7 0.9 19.9
Highest Mean Min. Temperature (F) 8.6 10.6 17.5 25.0 32.4 40.0 46.7 45.3 37.8 26.5 19.0 10.6 46.7
Year Highest Occurred 1999 1986 1986 1986 1993 1997 1998 1983 1997 1972 1998 1996 1998
Lowest Mean Min. Temperature (F) -13.1 -11.6 3.1 16.0 24.8 32.4 38.5 34.4 26.7 16.3 5.0 -5.8 -13.1
Year Lowest Occurred 1984 1974 1988 1984 1990 1975 1972 1978 1974 1976 2000 1978 1984
Mean Precipitation (in.) 0.78 0.80 0.99 1.27 1.59 1.01 2.06 1.27 1.30 1.25 1.04 0.77 14.13
Highest Precipitation (in.) 2.19 1.87 1.98 2.40 3.94 3.49 4.41 2.62 4.05 2.66 3.00 2.70 4.41
Year Highest Occurred 1996 1986 1983 1991 1995 1984 1984 1997 1985 1972 1985 1983 1984
Lowest Precipitation (in.) 0.06 0.25 0.40 0.29 0.24 0.10 0.26 0.34 0.16 0.22 0.23 0.15 0.06
Year Lowest Occurred 1990 1984 1986 1988 1974 1980 1997 1990 1979 2000 1976 1976 1990
Heating Degree Days (F) 1624. 1360. 1179. 868. 605. 315. 160. 201. 429. 767. 1147. 1513. 10168.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 1. 8. 5. 0. 0. 0. 0. 14.

Western Regional Climate Center, wrcc@dri.edu