TWIN LAKES RSVR, COLORADO

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 31.3 33.9 37.1 45.6 55.5 66.1 72.1 69.7 62.8 53.4 40.2 32.0 50.0
Highest Mean Max. Temperature (F) 42.0 39.7 44.2 69.3 60.2 71.3 76.4 74.0 68.6 59.8 45.4 43.5 53.3
Year Highest Occurred 1981 1984 1989 1989 1963 1990 1980 1985 1979 1963 1962 1980 1989
Lowest Mean Max. Temperature (F) 26.5 27.2 30.0 37.4 51.2 61.1 67.4 65.9 55.0 44.1 31.6 25.5 47.0
Year Lowest Occurred 1979 1975 1964 1970 1975 1969 1973 1964 1961 1969 1972 1978 1975
Mean Temperature (F) 15.0 17.1 22.6 31.6 41.3 50.5 56.6 54.6 47.9 38.7 26.8 17.8 35.0
Highest Mean Temperature (F) 23.4 23.7 31.1 52.5 45.2 55.7 60.6 58.5 53.5 44.4 31.9 28.4 38.5
Year Highest Occurred 1981 1986 1989 1989 1985 1981 1980 1983 1990 1963 1965 1980 1981
Lowest Mean Temperature (F) 8.6 8.5 15.7 22.1 35.1 45.6 52.6 50.9 42.5 31.5 19.5 11.6 31.2
Year Lowest Occurred 1984 1964 1964 1975 1975 1976 1973 1974 1973 1984 1972 1978 1975
Mean Min. Temperature (F) -1.4 0.2 8.1 17.6 27.1 34.9 41.0 39.4 33.0 23.9 13.4 3.5 20.1
Highest Mean Min. Temperature (F) 9.3 11.6 17.9 35.6 32.8 41.6 44.7 44.6 38.7 28.9 18.5 13.2 24.7
Year Highest Occurred 1971 1986 1989 1989 1985 1981 1980 1982 1990 1963 1965 1980 1981
Lowest Mean Min. Temperature (F) -10.9 -10.3 0.6 6.1 18.9 26.6 35.8 34.2 26.4 16.0 6.9 -2.4 15.4
Year Lowest Occurred 1984 1964 1975 1975 1975 1976 1962 1962 1973 1976 1979 1978 1975
Mean Precipitation (in.) 0.41 0.40 0.65 0.66 0.84 0.82 1.38 1.49 1.01 0.73 0.51 0.61 9.51
Highest Precipitation (in.) 1.58 1.23 1.65 2.46 2.64 3.20 2.85 3.27 3.02 2.27 1.79 1.84 13.47
Year Highest Occurred 1962 1989 1965 1990 1969 1988 1968 1984 1970 1969 1979 1966 1984
Lowest Precipitation (in.) 0.00 0.01 0.06 0.09 0.01 0.02 0.03 0.18 0.22 0.02 0.05 0.00 6.20
Year Lowest Occurred 1977 1970 1967 1979 1974 1962 1962 1985 1978 1976 1969 1976 1962
Heating Degree Days (F) 1550. 1341. 1314. 1002. 735. 435. 260. 322. 513. 815. 1146. 1463. 10896.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.

Western Regional Climate Center, wrcc@dri.edu