BONNY DAM 2NE, COLORADO

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 40.0 46.1 54.1 63.6 72.6 83.7 89.2 86.9 77.9 66.2 50.3 41.7 64.4
Highest Mean Max. Temperature (F) 49.7 56.6 63.8 70.4 79.6 89.5 93.5 94.7 84.8 70.7 62.3 51.2 94.7
Year Highest Occurred 1986 1991 1972 1981 1974 1988 1974 2000 1998 1979 1999 1980 2000
Lowest Mean Max. Temperature (F) 27.3 32.0 46.7 53.3 61.5 76.3 83.5 81.3 70.8 58.2 39.2 24.2 24.2
Year Lowest Occurred 1979 1978 1980 1984 1995 1982 1972 1992 1973 1984 1985 1983 1983
Mean Temperature (F) 26.9 32.3 39.4 48.3 58.1 68.6 74.2 72.2 62.9 50.7 37.1 29.0 50.0
Highest Mean Temperature (F) 34.9 39.9 44.9 54.7 63.3 74.0 78.0 78.2 70.1 53.5 46.1 36.1 78.2
Year Highest Occurred 1986 1999 1986 1981 1994 1994 1999 2000 1998 1979 1999 1980 2000
Lowest Mean Temperature (F) 14.5 20.3 33.6 41.4 51.9 63.0 70.6 67.4 57.6 45.4 28.9 13.5 13.5
Year Lowest Occurred 1979 1989 1980 1983 1995 1982 1972 1974 1974 1976 1985 1983 1983
Mean Min. Temperature (F) 13.7 18.5 24.6 33.0 43.6 53.5 59.2 57.5 47.9 35.1 23.9 16.2 35.6
Highest Mean Min. Temperature (F) 20.1 26.6 29.7 39.0 49.4 59.8 63.4 61.7 55.3 39.6 30.7 23.1 63.4
Year Highest Occurred 1986 1992 2000 1981 1994 1994 1999 2000 1998 2000 1998 1994 1999
Lowest Mean Min. Temperature (F) 1.8 6.7 18.4 27.7 37.9 46.0 55.4 52.8 40.5 29.3 18.1 2.9 1.8
Year Lowest Occurred 1979 1989 1996 1983 1983 1985 1985 1974 1974 1985 1982 1983 1979
Mean Precipitation (in.) 0.46 0.45 1.22 1.83 3.48 2.70 2.81 2.17 1.39 1.00 0.75 0.36 18.62
Highest Precipitation (in.) 1.33 1.75 4.38 4.52 6.46 6.45 6.90 5.89 5.62 3.10 2.53 1.51 6.90
Year Highest Occurred 1992 1984 1981 1984 1975 1989 1998 1977 1996 1984 1991 1982 1998
Lowest Precipitation (in.) 0.00 0.00 0.00 0.36 0.40 0.35 0.42 0.38 0.02 0.00 0.03 0.00 0.00
Year Lowest Occurred 1999 1972 1997 1992 1992 1981 1978 1971 1974 1988 1996 1995 1999
Heating Degree Days (F) 1183. 916. 794. 503. 240. 47. 1. 15. 136. 445. 838. 1119. 6237.
Cooling Degree Days (F) 0. 0. 0. 2. 25. 155. 286. 238. 74. 1. 0. 0. 781.

Western Regional Climate Center, wrcc@dri.edu