Stephan, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 25° -36° (1982) 65° (1987) 0.41" NA
February 31° -40° (1994) 72° (2000) 0.5" NA
March 18° 43° -25° (1960) 85° (1988) 1.31" NA
April 31° 58° -1° (1975) 99° (1980) 1.98" NA
May 43° 70° 13° (1967) 103° (1969) 2.95" NA
June 53° 80° 29° (1964) 110° (1988) 2.95" NA
July 58° 87° 32° (1964) 111° (2006) 2.62" NA
August 56° 85° 31° (1986) 112° (1965) 2.07" NA
September 46° 75° 17° (1974) 107° (1983) 1.77" NA
October 32° 61° 2° (1991) 95° (1997) 1.75" NA
November 17° 41° -22° (1959) 82° (1999) 0.65" NA
December 28° -32° (1990) 70° (1998) 0.41" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 52° 81° 36° (1965) 104° (1983) 0.06" NA
Sep 2 51° 80° 38° (1972) 107° (1983) 0.06" NA
Sep 3 51° 80° 32° (1974) 104° (1983) 0.06" NA
Sep 4 50° 80° 32° (1961) 101° (1978) 0.06" NA
Sep 5 50° 79° 30° (1962) 106° (1978) 0.06" NA
Sep 6 50° 79° 37° (1986) 106° (1976) 0.06" NA
Sep 7 49° 79° 39° (1965) 101° (1978) 0.06" NA
Sep 8 49° 78° 30° (1986) 100° (1959) 0.06" NA
Sep 9 48° 78° 36° (2001) 100° (1979) 0.06" NA
Sep 10 48° 77° 30° (1959) 102° (1978) 0.06" NA
Sep 11 47° 77° 33° (1989) 97° (1962) 0.06" NA
Sep 12 47° 77° 33° (1960) 99° (1981) 0.05" NA
Sep 13 47° 76° 32° (1986) 96° (2004) 0.05" NA
Sep 14 46° 76° 27° (2007) 97° (1969) 0.05" NA
Sep 15 46° 75° 28° (1961) 92° (1995) 0.06" NA
Sep 16 45° 75° 32° (1973) 94° (1979) 0.06" NA
Sep 17 45° 75° 29° (1981) 96° (1988) 0.06" NA
Sep 18 45° 74° 31° (1971) 97° (1984) 0.06" NA
Sep 19 44° 74° 21° (1991) 99° (1984) 0.06" NA
Sep 20 44° 74° 27° (1962) 95° (1984) 0.06" NA
Sep 21 43° 73° 19° (1983) 93° (1984) 0.06" NA
Sep 22 43° 73° 20° (1983) 90° (1984) 0.06" NA
Sep 23 42° 72° 20° (1983) 89° (1967) 0.06" NA
Sep 24 42° 72° 22° (1965) 94° (2007) 0.06" NA
Sep 25 42° 71° 24° (1965) 91° (1974) 0.06" NA
Sep 26 41° 71° 20° (1984) 99° (1974) 0.06" NA
Sep 27 41° 71° 23° (1984) 95° (1983) 0.06" NA
Sep 28 40° 70° 21° (1974) 87° (1981) 0.06" NA
Sep 29 40° 70° 20° (1984) 90° (1991) 0.06" NA
Sep 30 40° 69° 17° (1974) 95° (1989) 0.06" NA
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