CASTLEWOOD, SOUTH DAKOTA

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 20.4 27.4 38.6 54.9 68.4 77.3 82.5 80.5 71.6 58.7 38.7 24.8 53.7
Highest Mean Max. Temperature (F) 35.8 41.5 51.7 66.5 76.6 87.6 90.5 89.9 78.3 64.6 54.9 35.9 90.5
Year Highest Occurred 1990 1987 2000 1987 1977 1988 1976 1983 1998 1973 1999 1979 1976
Lowest Mean Max. Temperature (F) 8.2 15.4 29.8 42.9 60.1 69.8 70.6 73.7 64.0 54.2 27.0 6.5 6.5
Year Lowest Occurred 1979 1989 1984 1975 1996 1993 1992 1992 1993 1995 1996 1983 1983
Mean Temperature (F) 9.8 17.0 28.6 43.1 56.1 65.6 70.5 68.2 58.3 45.4 28.7 15.0 42.2
Highest Mean Temperature (F) 24.1 31.1 39.0 51.0 64.0 73.1 75.8 75.7 63.7 51.0 40.7 23.9 75.8
Year Highest Occurred 1990 1987 2000 1987 1977 1988 1974 1983 1998 1973 1999 1979 1974
Lowest Mean Temperature (F) -2.2 3.2 20.4 36.7 50.4 60.2 61.5 62.4 52.1 41.0 18.2 -1.8 -2.2
Year Lowest Occurred 1979 1979 1975 1975 1997 1982 1992 1992 1993 1987 1985 1983 1979
Mean Min. Temperature (F) -0.9 6.6 18.6 31.2 43.8 53.8 58.4 55.8 45.0 32.1 18.7 5.1 30.7
Highest Mean Min. Temperature (F) 12.5 20.7 26.3 36.5 51.5 60.0 62.2 61.6 49.6 37.3 26.4 15.8 62.2
Year Highest Occurred 1990 1987 1973 1977 1977 1991 1974 1983 1978 1973 1999 1998 1974
Lowest Mean Min. Temperature (F) -13.0 -9.4 10.1 26.4 38.1 47.9 52.4 51.1 39.5 26.8 8.6 -10.2 -13.0
Year Lowest Occurred 1978 1979 1975 1996 1997 1982 1992 1992 1974 1976 1985 1983 1978
Mean Precipitation (in.) 0.70 0.55 1.33 1.99 2.95 4.15 3.41 2.87 2.31 1.94 0.96 0.49 23.65
Highest Precipitation (in.) 2.45 2.38 4.23 6.42 8.29 11.71 8.24 6.37 8.03 6.93 3.32 1.51 11.71
Year Highest Occurred 1979 1977 1977 1986 1972 1980 1997 1978 1985 1984 1983 1977 1980
Lowest Precipitation (in.) 0.00 0.06 0.07 0.15 0.36 0.49 0.54 0.53 0.40 0.00 0.00 0.00 0.00
Year Lowest Occurred 1991 1983 1971 1996 1976 1988 1971 1976 1979 1989 1999 1989 1991
Heating Degree Days (F) 1715. 1345. 1130. 659. 301. 82. 33. 55. 224. 607. 1088. 1553. 8792.
Cooling Degree Days (F) 0. 0. 0. 1. 25. 98. 203. 153. 23. 0. 0. 0. 503.

Western Regional Climate Center, wrcc@dri.edu