GREEN MT DAM, COLORADO

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 29.0 34.1 42.1 53.0 63.2 73.8 79.1 77.3 69.4 58.4 42.4 31.0 54.4
Highest Mean Max. Temperature (F) 38.7 41.3 49.8 59.7 70.6 80.0 85.1 81.7 77.3 69.1 51.0 42.6 59.2
Year Highest Occurred 1969 1963 1972 1981 1963 1977 1963 1962 1963 1963 1962 1980 1963
Lowest Mean Max. Temperature (F) 16.4 25.7 32.6 44.2 55.7 68.0 72.5 72.2 63.1 45.6 34.0 22.1 49.0
Year Lowest Occurred 1984 1984 1965 1984 1983 1984 1990 1989 1986 1984 1979 1966 1984
Mean Temperature (F) 16.5 20.2 28.2 38.7 48.1 56.6 62.0 60.4 52.9 42.9 30.3 19.5 39.7
Highest Mean Temperature (F) 26.4 27.5 36.4 44.9 53.5 61.1 66.3 64.6 59.5 51.5 37.5 29.9 43.4
Year Highest Occurred 1969 1963 1972 1981 1963 1977 1963 1969 1963 1963 1981 1980 1963
Lowest Mean Temperature (F) 4.6 11.1 19.1 31.4 43.5 53.1 57.3 55.9 48.7 34.7 22.3 11.4 35.8
Year Lowest Occurred 1984 1984 1965 1984 1983 1989 1990 1989 1961 1984 1979 1966 1984
Mean Min. Temperature (F) 4.0 6.2 14.3 24.4 32.8 39.4 44.8 43.5 36.5 27.5 18.1 7.9 25.0
Highest Mean Min. Temperature (F) 14.8 16.4 23.0 30.0 38.5 44.0 47.7 47.9 41.6 33.9 26.6 17.5 29.9
Year Highest Occurred 1971 1986 1972 1981 1981 1981 1969 1983 1963 1963 1981 1981 1981
Lowest Mean Min. Temperature (F) -7.5 -4.0 5.5 17.5 29.3 35.9 36.5 39.4 32.4 22.5 10.6 0.7 22.2
Year Lowest Occurred 1962 1973 1965 1980 1990 1975 1980 1980 1987 1976 1979 1966 1989
Mean Precipitation (in.) 0.98 0.96 1.39 1.26 1.51 1.29 1.57 1.50 1.43 1.17 1.08 1.13 15.27
Highest Precipitation (in.) 2.84 2.36 2.62 2.47 3.58 4.66 3.98 5.22 5.95 3.48 2.77 2.57 21.68
Year Highest Occurred 1980 1986 1965 1961 1981 1969 1984 1963 1961 1969 1983 1983 1984
Lowest Precipitation (in.) 0.00 0.35 0.41 0.30 0.35 0.01 0.47 0.37 0.07 0.12 0.20 0.12 10.39
Year Lowest Occurred 1990 1981 1962 1963 1970 1980 1988 1974 1979 1965 1962 1976 1988
Heating Degree Days (F) 1504. 1254. 1141. 789. 524. 256. 122. 158. 363. 685. 1041. 1411. 9248.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 0. 29. 15. 0. 0. 0. 0. 44.

Western Regional Climate Center, wrcc@dri.edu