PORCUPINE 11 N, 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) 33.0 39.2 48.5 59.4 70.0 80.3 88.0 87.6 78.0 64.4 45.6 36.2 60.9
Highest Mean Max. Temperature (F) 45.2 52.7 55.0 68.4 80.5 90.0 95.9 94.5 85.4 68.5 60.1 48.9 95.9
Year Highest Occurred 1990 1999 1992 1981 1985 1988 1974 1973 1979 1974 1999 1999 1974
Lowest Mean Max. Temperature (F) 16.6 23.1 38.1 50.5 60.7 71.6 77.7 80.8 68.6 60.3 27.4 14.6 14.6
Year Lowest Occurred 1979 1978 1996 1983 1995 1998 1992 1977 1986 1995 1985 1983 1983
Mean Temperature (F) 20.0 25.6 34.4 44.7 56.2 66.1 72.9 71.4 60.6 47.3 31.7 22.5 46.1
Highest Mean Temperature (F) 30.5 37.9 42.4 52.1 63.3 75.1 78.7 77.8 66.2 50.7 42.3 32.0 78.7
Year Highest Occurred 1990 1999 1986 1981 1985 1988 1974 1983 1978 1974 1999 1999 1974
Lowest Mean Temperature (F) 4.5 13.3 25.0 37.4 50.5 58.7 64.4 65.7 53.8 43.6 16.2 2.5 2.5
Year Lowest Occurred 1979 1978 1996 1983 1983 1998 1992 1992 1993 1993 1985 1983 1983
Mean Min. Temperature (F) 6.9 12.0 20.2 30.0 42.4 51.9 57.8 55.2 43.2 30.1 17.7 8.7 31.3
Highest Mean Min. Temperature (F) 17.3 23.1 30.2 35.7 49.3 60.2 63.0 62.2 49.1 33.9 26.2 16.0 63.0
Year Highest Occurred 1983 1999 1986 1981 1977 1988 1977 1983 1998 1998 1998 1979 1977
Lowest Mean Min. Temperature (F) -7.5 -1.0 11.9 23.6 36.3 45.7 51.0 49.5 36.8 24.5 5.0 -9.6 -9.6
Year Lowest Occurred 1979 1993 1996 1998 1983 1998 1992 1992 1974 1991 1985 1983 1983
Mean Precipitation (in.) 0.40 0.47 1.00 1.90 2.81 2.95 2.66 1.57 1.35 1.43 0.60 0.38 17.52
Highest Precipitation (in.) 1.60 1.60 3.63 5.09 5.54 7.42 4.92 4.66 3.87 4.91 1.84 1.34 7.42
Year Highest Occurred 1996 1987 1977 2000 1982 1991 1982 1993 1986 1998 1985 1996 1991
Lowest Precipitation (in.) 0.00 0.00 0.10 0.02 0.41 0.22 0.66 0.38 0.01 0.17 0.00 0.00 0.00
Year Lowest Occurred 1987 1977 1978 1998 1974 1978 1971 1973 1991 1988 1997 1998 1987
Heating Degree Days (F) 1396. 1104. 949. 610. 293. 91. 31. 26. 185. 550. 1000. 1320. 7555.
Cooling Degree Days (F) 0. 0. 0. 0. 20. 124. 275. 225. 53. 0. 0. 0. 697.

Western Regional Climate Center, wrcc@dri.edu