GRAND RAPIDS FRS LAB, MINNESOTA

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 15.0 23.0 36.1 52.4 65.8 75.0 79.8 76.8 65.9 54.0 35.5 19.7 49.9
Highest Mean Max. Temperature (F) 26.7 35.2 44.3 64.9 77.4 82.5 86.0 82.4 71.2 66.1 43.0 28.2 55.0
Year Highest Occurred 1990 1987 1981 1987 1977 1988 1988 1984 1976 1963 1981 1982 1987
Lowest Mean Max. Temperature (F) 4.2 15.1 26.3 43.6 58.2 66.6 73.2 70.9 55.2 47.0 28.4 9.3 46.8
Year Lowest Occurred 1966 1979 1965 1975 1967 1969 1962 1964 1965 1969 1985 1983 1972
Mean Temperature (F) 3.8 10.7 25.0 40.7 53.1 62.3 67.4 64.6 54.6 43.5 27.3 10.3 38.6
Highest Mean Temperature (F) 17.3 25.4 34.4 48.9 62.4 67.5 71.3 70.1 58.7 53.6 34.7 20.7 43.8
Year Highest Occurred 1990 1987 1973 1987 1977 1988 1988 1983 1978 1963 1981 1982 1987
Lowest Mean Temperature (F) -7.3 1.0 14.1 33.8 46.1 55.3 62.7 59.6 47.1 37.3 18.8 -1.5 35.5
Year Lowest Occurred 1966 1989 1965 1975 1967 1969 1962 1977 1965 1976 1985 1983 1972
Mean Min. Temperature (F) -7.4 -1.6 13.9 28.9 40.3 49.7 55.0 52.4 43.2 33.0 19.1 0.8 27.3
Highest Mean Min. Temperature (F) 7.8 15.6 25.1 34.0 47.4 53.0 58.9 58.1 47.4 41.1 26.4 13.1 32.6
Year Highest Occurred 1990 1987 1973 1986 1977 1970 1983 1983 1978 1963 1981 1982 1987
Lowest Mean Min. Temperature (F) -19.5 -13.6 1.9 24.0 33.9 44.0 50.4 47.8 37.9 25.2 9.2 -12.3 24.2
Year Lowest Occurred 1982 1989 1965 1975 1967 1969 1971 1977 1974 1976 1985 1983 1972
Mean Precipitation (in.) 0.91 0.54 1.31 2.11 3.05 4.11 3.90 3.59 3.31 2.44 1.28 0.99 27.54
Highest Precipitation (in.) 3.16 1.48 3.01 4.27 6.41 7.52 9.43 10.03 7.53 6.82 3.15 2.76 38.00
Year Highest Occurred 1975 1971 1979 1985 1985 1976 1978 1988 1965 1973 1988 1968 1977
Lowest Precipitation (in.) 0.07 0.03 0.23 0.31 0.41 0.50 0.78 0.61 0.54 0.40 0.13 0.21 17.98
Year Lowest Occurred 1963 1968 1969 1987 1976 1961 1968 1970 1967 1976 1976 1979 1976
Heating Degree Days (F) 1897. 1520. 1240. 729. 385. 125. 44. 93. 315. 667. 1131. 1696. 9842.
Cooling Degree Days (F) 0. 0. 0. 0. 17. 44. 119. 80. 0. 0. 0. 0. 260.

Western Regional Climate Center, wrcc@dri.edu