Dewey, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 34° -31° (1982) 68° (1989) 0.41" NA
February 13° 40° -34° (1982) 69° (1995) 0.49" NA
March 22° 50° -24° (1989) 82° (1986) 0.95" NA
April 32° 61° 7° (2002) 92° (1980) 2.11" NA
May 42° 70° 19° (1979) 97° (2003) 2.66" NA
June 51° 81° 32° (1979) 104° (2002) 2.51" NA
July 57° 89° 42° (1997) 107° (2006) 1.95" NA
August 56° 88° 37° (1992) 105° (1995) 1.56" NA
September 44° 77° 8° (1984) 100° (2001) 1.23" NA
October 32° 64° -10° (1991) 91° (1992) 1.24" NA
November 19° 46° -17° (1986) 80° (1999) 0.7" NA
December 36° -40° (1989) 70° (1995) 0.45" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Feb 1 36° -25° (1985) 66° (1989) 0.01" NA
Feb 2 36° -32° (1996) 63° (1992) 0.01" NA
Feb 3 36° -32° (1996) 53° (1992) 0.01" NA
Feb 4 10° 37° -25° (1982) 55° (2005) 0.01" NA
Feb 5 10° 37° -34° (1982) 60° (1999) 0.01" NA
Feb 6 10° 37° -32° (1982) 57° (2005) 0.01" NA
Feb 7 10° 37° -18° (1985) 55° (2002) 0.01" NA
Feb 8 11° 38° -13° (1989) 64° (1999) 0.02" NA
Feb 9 11° 38° -27° (1994) 58° (1996) 0.02" NA
Feb 10 11° 38° -21° (1986) 66° (1996) 0.02" NA
Feb 11 11° 39° -27° (1981) 58° (1990) 0.02" NA
Feb 12 12° 39° -22° (1986) 64° (1990) 0.02" NA
Feb 13 12° 39° -11° (2007) 58° (1983) 0.02" NA
Feb 14 12° 40° -14° (2001) 61° (1983) 0.02" NA
Feb 15 12° 40° -27° (2007) 60° (1999) 0.02" NA
Feb 16 13° 40° -27° (2007) 57° (2002) 0.02" NA
Feb 17 13° 41° -29° (1993) 61° (2002) 0.02" NA
Feb 18 13° 41° -31° (2006) 62° (2002) 0.02" NA
Feb 19 14° 41° -31° (2006) 64° (1983) 0.02" NA
Feb 20 14° 42° -10° (2006) 63° (1981) 0.02" NA
Feb 21 14° 42° -10° (2006) 64° (2000) 0.02" NA
Feb 22 15° 42° -18° (1993) 68° (1982) 0.02" NA
Feb 23 15° 43° -18° (1993) 62° (1996) 0.02" NA
Feb 24 15° 43° -23° (2003) 61° (2000) 0.02" NA
Feb 25 16° 43° -9° (1994) 69° (1995) 0.02" NA
Feb 26 16° 44° -15° (1993) 69° (1995) 0.02" NA
Feb 27 16° 44° -13° (1993) 63° (2004) 0.02" NA
Feb 28 17° 44° -10° (1993) 69° (1980) 0.02" NA
Feb 29 17° 44° -9° (1996) 66° (1992) 0.02" NA
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