Fort Thompson, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 27° -36° (1982) 65° (1987) 0.44" 4.3"
February 32° -40° (1994) 72° (2000) 0.56" 8.1"
March 19° 43° -25° (1960) 85° (1988) 1.23" 8.4"
April 31° 58° -1° (1975) 99° (1980) 1.83" 4.2"
May 43° 69° 13° (1967) 103° (1969) 3.04" 0.4"
June 54° 79° 29° (1964) 110° (1988) 3.42" 0"
July 59° 86° 32° (1964) 111° (2006) 2.91" 0"
August 57° 85° 31° (1986) 112° (1965) 2.16" 0"
September 46° 75° 17° (1974) 107° (1983) 2.13" 0.1"
October 33° 60° 2° (1991) 95° (1997) 1.72" 0.9"
November 19° 43° -22° (1959) 82° (1999) 0.7" 4.9"
December 29° -32° (1990) 70° (1998) 0.48" 6.1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 38° 65° 20° (1961) 93° (1992) 0.09" 0"
May 2 38° 65° 13° (1967) 88° (1981) 0.09" 0.1"
May 3 38° 66° 15° (2005) 90° (1982) 0.1" 0"
May 4 39° 66° 19° (1967) 91° (1962) 0.09" 0.1"
May 5 39° 66° 25° (1976) 92° (2000) 0.09" 0"
May 6 40° 67° 20° (1976) 95° (2004) 0.09" 0"
May 7 40° 67° 21° (1980) 92° (1963) 0.09" 0.1"
May 8 40° 67° 17° (1980) 89° (1985) 0.1" 0"
May 9 41° 67° 23° (1966) 92° (1985) 0.09" 0"
May 10 41° 68° 18° (1981) 88° (1961) 0.1" 0.1"
May 11 42° 68° 26° (1960) 85° (1992) 0.1" 0"
May 12 42° 68° 27° (1971) 90° (2004) 0.1" 0"
May 13 42° 69° 25° (1983) 88° (1965) 0.1" 0"
May 14 43° 69° 22° (2004) 92° (1969) 0.1" 0"
May 15 43° 69° 25° (1983) 91° (2001) 0.1" 0"
May 16 43° 69° 26° (2009) 91° (1987) 0.1" 0"
May 17 44° 70° 28° (1986) 93° (1970) 0.1" 0"
May 18 44° 70° 27° (2002) 90° (1964) 0.1" 0"
May 19 45° 70° 30° (1981) 97° (1992) 0.1" 0"
May 20 45° 70° 26° (1967) 98° (2009) 0.1" 0"
May 21 45° 71° 30° (1968) 97° (1964) 0.1" 0"
May 22 46° 71° 21° (1963) 93° (1985) 0.1" 0"
May 23 46° 71° 29° (1992) 89° (1994) 0.1" 0"
May 24 46° 71° 29° (1992) 90° (1967) 0.1" 0"
May 25 47° 72° 30° (1983) 94° (1985) 0.1" 0"
May 26 47° 72° 28° (1992) 92° (1966) 0.1" 0"
May 27 47° 72° 29° (1992) 103° (1969) 0.09" 0"
May 28 48° 72° 25° (1965) 95° (1979) 0.1" 0"
May 29 48° 73° 34° (2005) 89° (1994) 0.1" 0"
May 30 48° 73° 34° (1983) 92° (1969) 0.11" 0"
May 31 49° 73° 37° (1968) 94° (2002) 0.11" 0"
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