Fort Thompson, 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
Apr 1 25° 51° -1° (1975) 82° (1964) 0.05" NA
Apr 2 25° 51° 1° (1975) 78° (1964) 0.05" NA
Apr 3 26° 52° 0° (1975) 78° (1990) 0.06" NA
Apr 4 26° 52° 12° (1963) 76° (1991) 0.06" NA
Apr 5 26° 53° 7° (1994) 87° (1992) 0.06" NA
Apr 6 27° 53° 12° (1979) 85° (1991) 0.06" NA
Apr 7 27° 54° 7° (2007) 86° (1970) 0.06" NA
Apr 8 28° 54° 3° (1964) 86° (1971) 0.06" NA
Apr 9 28° 55° 8° (1982) 92° (1977) 0.06" NA
Apr 10 28° 55° 10° (1973) 89° (1977) 0.06" NA
Apr 11 29° 56° 6° (1997) 85° (1968) 0.06" NA
Apr 12 29° 56° 10° (1961) 79° (1988) 0.06" NA
Apr 13 30° 56° 15° (2004) 84° (1976) 0.06" NA
Apr 14 30° 57° 12° (1983) 90° (2003) 0.06" NA
Apr 15 30° 57° 15° (1983) 88° (1971) 0.06" NA
Apr 16 31° 58° 15° (1961) 90° (1964) 0.07" NA
Apr 17 31° 58° 12° (2001) 86° (1987) 0.07" NA
Apr 18 32° 59° 12° (1988) 92° (1985) 0.07" NA
Apr 19 32° 59° 19° (1988) 89° (1987) 0.07" NA
Apr 20 33° 60° 10° (1966) 96° (1980) 0.07" NA
Apr 21 33° 60° 14° (1966) 99° (1980) 0.07" NA
Apr 22 33° 60° 19° (1967) 90° (1990) 0.07" NA
Apr 23 34° 61° 19° (1967) 87° (1990) 0.07" NA
Apr 24 34° 61° 18° (1967) 89° (1962) 0.07" NA
Apr 25 35° 62° 25° (1985) 93° (1962) 0.07" NA
Apr 26 35° 62° 20° (1992) 83° (1981) 0.08" NA
Apr 27 35° 63° 18° (1973) 85° (1977) 0.08" NA
Apr 28 36° 63° 21° (1961) 89° (1987) 0.08" NA
Apr 29 36° 63° 20° (1994) 90° (2001) 0.08" NA
Apr 30 37° 64° 16° (1966) 96° (1992) 0.08" NA
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