PLYMOUTH, WISCONSIN

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 25.7 30.3 40.9 55.1 68.0 77.4 82.2 79.8 71.5 59.3 44.4 30.4 55.4
Highest Mean Max. Temperature (F) 37.8 39.1 50.5 63.0 76.7 86.0 87.3 85.8 76.3 69.6 51.6 38.8 58.6
Year Highest Occurred 1990 1984 1968 1977 1977 1988 1966 1969 1978 1963 1975 1982 1987
Lowest Mean Max. Temperature (F) 15.0 23.4 31.3 48.0 59.7 69.7 76.3 76.3 68.0 54.0 38.0 19.7 53.0
Year Lowest Occurred 1977 1979 1965 1975 1983 1969 1962 1985 1964 1988 1976 1983 1972
Mean Temperature (F) 17.5 21.8 32.3 44.8 56.1 65.8 71.1 69.1 61.1 49.8 36.7 23.0 45.8
Highest Mean Temperature (F) 29.7 31.5 39.3 50.8 63.2 71.7 75.3 74.5 65.7 58.8 42.6 32.1 49.5
Year Highest Occurred 1990 1984 1968 1977 1977 1988 1983 1988 1978 1963 1975 1982 1987
Lowest Mean Temperature (F) 6.3 13.9 24.8 39.0 49.4 59.2 66.4 65.0 56.9 44.6 29.5 13.0 43.1
Year Lowest Occurred 1977 1979 1965 1975 1966 1969 1962 1967 1975 1988 1976 1983 1972
Mean Min. Temperature (F) 9.2 13.3 23.6 34.4 44.1 54.1 59.9 58.3 50.6 40.3 29.0 15.5 36.0
Highest Mean Min. Temperature (F) 21.6 23.9 30.5 39.0 50.4 60.1 64.6 64.2 55.1 47.9 33.6 25.4 40.2
Year Highest Occurred 1990 1984 1973 1987 1982 1987 1983 1988 1978 1963 1975 1982 1987
Lowest Mean Min. Temperature (F) -2.5 4.4 18.0 29.9 37.2 48.5 55.9 52.3 45.6 35.1 20.9 4.5 33.2
Year Lowest Occurred 1977 1979 1969 1975 1966 1982 1965 1967 1975 1976 1976 1976 1972
Mean Precipitation (in.) 1.25 1.19 2.44 3.35 3.59 3.63 3.64 4.33 4.65 2.95 2.80 2.15 35.97
Highest Precipitation (in.) 2.77 4.21 6.01 6.48 8.00 7.89 6.92 7.91 13.67 6.32 8.78 4.98 45.51
Year Highest Occurred 1969 1971 1977 1973 1973 1984 1977 1980 1986 1973 1985 1987 1973
Lowest Precipitation (in.) 0.00 0.06 0.05 1.25 0.80 0.77 1.21 0.13 0.04 0.33 0.30 0.35 23.94
Year Lowest Occurred 1981 1982 1978 1989 1988 1988 1990 1969 1979 1963 1976 1976 1963
Heating Degree Days (F) 1473. 1210. 1014. 606. 302. 76. 13. 25. 136. 471. 849. 1302. 7477.
Cooling Degree Days (F) 0. 0. 0. 0. 26. 100. 202. 152. 19. 0. 0. 0. 499.

Western Regional Climate Center, wrcc@dri.edu