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
May 1 37° 64° 20° (1961) 93° (1992) 0.08" NA
May 2 38° 65° 13° (1967) 88° (1981) 0.08" NA
May 3 38° 65° 15° (2005) 90° (1982) 0.09" NA
May 4 38° 65° 19° (1967) 91° (1962) 0.09" NA
May 5 39° 66° 25° (1976) 92° (2000) 0.09" NA
May 6 39° 66° 20° (1976) 95° (2004) 0.09" NA
May 7 40° 67° 21° (1980) 92° (1963) 0.09" NA
May 8 40° 67° 17° (1980) 89° (1985) 0.09" NA
May 9 41° 67° 23° (1966) 92° (1985) 0.09" NA
May 10 41° 68° 18° (1981) 88° (1961) 0.09" NA
May 11 41° 68° 26° (1960) 85° (1992) 0.09" NA
May 12 42° 68° 27° (1971) 90° (2004) 0.09" NA
May 13 42° 69° 25° (1983) 88° (1965) 0.09" NA
May 14 43° 69° 22° (2004) 92° (1969) 0.1" NA
May 15 43° 70° 25° (1983) 91° (2001) 0.1" NA
May 16 43° 70° 30° (1983) 91° (1987) 0.1" NA
May 17 44° 70° 28° (1986) 93° (1970) 0.1" NA
May 18 44° 71° 27° (2002) 90° (1964) 0.1" NA
May 19 44° 71° 30° (1981) 97° (1992) 0.1" NA
May 20 45° 71° 26° (1967) 93° (1964) 0.1" NA
May 21 45° 72° 30° (1968) 97° (1964) 0.1" NA
May 22 46° 72° 21° (1963) 93° (1985) 0.1" NA
May 23 46° 72° 29° (1992) 89° (1994) 0.1" NA
May 24 46° 73° 29° (1992) 90° (1967) 0.1" NA
May 25 47° 73° 30° (1983) 94° (1985) 0.1" NA
May 26 47° 73° 28° (1992) 92° (1966) 0.1" NA
May 27 47° 74° 29° (1992) 103° (1969) 0.1" NA
May 28 48° 74° 25° (1965) 95° (1979) 0.1" NA
May 29 48° 74° 34° (2005) 89° (1994) 0.1" NA
May 30 48° 75° 34° (1983) 92° (1969) 0.1" NA
May 31 49° 75° 37° (1968) 94° (2002) 0.1" NA
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