GREEN RIVER, WYOMING

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 30.9 35.9 44.0 54.4 65.9 76.6 85.4 83.2 72.8 61.6 44.0 33.0 57.3
Highest Mean Max. Temperature (F) 40.4 45.1 53.6 66.2 72.3 85.3 90.2 87.4 80.4 70.4 51.3 45.2 60.9
Year Highest Occurred 1981 1977 1986 1987 1969 1977 1989 1969 1979 1988 1962 1980 1988
Lowest Mean Max. Temperature (F) 17.7 25.0 32.9 45.7 59.8 68.8 81.6 75.7 61.3 49.6 34.3 23.2 54.1
Year Lowest Occurred 1979 1989 1969 1968 1967 1975 1986 1968 1965 1969 1971 1983 1984
Mean Temperature (F) 16.4 21.1 30.4 40.1 50.4 59.6 67.1 64.7 54.2 43.3 29.1 18.5 41.2
Highest Mean Temperature (F) 24.1 29.3 38.4 46.3 54.5 66.1 70.4 68.3 60.5 48.7 35.2 29.6 43.8
Year Highest Occurred 1983 1963 1986 1990 1987 1977 1989 1983 1990 1963 1965 1980 1981
Lowest Mean Temperature (F) 3.9 10.2 17.4 33.3 46.3 54.3 64.6 60.2 46.7 36.4 21.4 11.3 38.6
Year Lowest Occurred 1979 1973 1969 1970 1967 1969 1982 1968 1965 1969 1971 1971 1984
Mean Min. Temperature (F) 1.9 6.3 16.6 25.7 34.8 42.7 48.8 46.1 35.4 25.0 14.2 3.9 25.1
Highest Mean Min. Temperature (F) 11.7 16.0 23.2 29.9 38.1 49.0 51.9 51.7 40.8 29.5 20.7 13.9 27.9
Year Highest Occurred 1971 1986 1989 1990 1987 1974 1966 1983 1990 1963 1965 1980 1981
Lowest Mean Min. Temperature (F) -9.9 -7.3 1.9 20.5 32.7 39.1 45.9 41.3 29.9 20.7 6.8 -3.4 22.9
Year Lowest Occurred 1979 1973 1969 1982 1986 1980 1972 1988 1988 1970 1979 1984 1973
Mean Precipitation (in.) 0.31 0.27 0.55 0.86 1.04 0.88 0.72 0.64 0.80 0.65 0.39 0.38 7.49
Highest Precipitation (in.) 0.89 0.81 1.50 2.92 3.39 2.76 4.87 2.05 2.51 1.50 0.96 1.18 11.47
Year Highest Occurred 1980 1986 1983 1986 1971 1970 1977 1968 1973 1971 1983 1983 1986
Lowest Precipitation (in.) 0.03 0.00 0.05 0.01 0.00 0.00 0.07 0.00 0.02 0.01 0.00 0.00 3.82
Year Lowest Occurred 1961 1977 1976 1989 1969 1977 1974 1985 1979 1988 1976 1962 1974
Heating Degree Days (F) 1507. 1229. 1073. 747. 453. 193. 26. 76. 332. 673. 1077. 1442. 8828.
Cooling Degree Days (F) 0. 0. 0. 0. 0. 31. 91. 67. 8. 0. 0. 0. 197.

Western Regional Climate Center, wrcc@dri.edu