Swan Lake, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 26° -44° (1912) 70° (2002) 0.43" 5.1"
February 12° 32° -35° (1936) 72° (1982) 0.52" 6.5"
March 24° 44° -21° (1913) 92° (1943) 1.64" 6.6"
April 35° 59° 1° (1936) 97° (1926) 2.47" 0.9"
May 48° 71° 19° (1909) 109° (1934) 3.65" 0"
June 58° 81° 33° (1935) 108° (1931) 3.95" 0"
July 62° 85° 38° (1971) 113° (1936) 3.35" 0"
August 60° 83° 32° (1986) 111° (1936) 2.83" 0"
September 49° 75° 19° (1984) 106° (1971) 2.26" 0"
October 37° 63° -6° (1925) 95° (1963) 1.8" 0.8"
November 24° 43° -20° (1977) 82° (1999) 1.36" 3.4"
December 11° 29° -39° (1917) 67° (1998) 0.55" 7.6"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 30° 52° 2° (1924) 87° (1963) 0.07" NA
Apr 2 30° 52° 9° (1975) 86° (1921) 0.07" NA
Apr 3 30° 53° 1° (1936) 84° (1981) 0.07" NA
Apr 4 31° 54° 10° (1975) 85° (1930) 0.07" NA
Apr 5 31° 54° 12° (1994) 89° (1929) 0.07" NA
Apr 6 32° 55° 9° (1982) 89° (1991) 0.07" NA
Apr 7 32° 55° 10° (1936) 91° (1991) 0.07" NA
Apr 8 32° 56° 10° (1997) 88° (1931) 0.07" NA
Apr 9 33° 56° 10° (1928) 88° (1988) 0.07" NA
Apr 10 33° 57° 15° (1989) 85° (1977) 0.08" NA
Apr 11 33° 57° 15° (1940) 86° (1968) 0.08" NA
Apr 12 34° 58° 13° (1939) 88° (1985) 0.08" NA
Apr 13 34° 58° 18° (1907) 90° (1908) 0.08" NA
Apr 14 35° 58° 11° (1928) 93° (1954) 0.08" NA
Apr 15 35° 59° 19° (1986) 88° (1924) 0.08" NA
Apr 16 35° 59° 18° (1928) 93° (1964) 0.08" NA
Apr 17 36° 60° 13° (1990) 87° (1964) 0.08" NA
Apr 18 36° 60° 18° (1905) 90° (1985) 0.08" NA
Apr 19 37° 61° 17° (1928) 94° (1985) 0.09" NA
Apr 20 37° 61° 22° (1943) 92° (1987) 0.09" NA
Apr 21 37° 62° 18° (1927) 93° (1980) 0.09" NA
Apr 22 38° 62° 19° (1927) 95° (1980) 0.09" NA
Apr 23 38° 62° 21° (1996) 92° (1990) 0.09" NA
Apr 24 39° 63° 19° (1918) 90° (1906) 0.09" NA
Apr 25 39° 63° 23° (1928) 95° (1962) 0.09" NA
Apr 26 40° 64° 24° (1931) 90° (1981) 0.09" NA
Apr 27 40° 64° 20° (1928) 90° (1987) 0.1" NA
Apr 28 40° 65° 23° (1926) 91° (1981) 0.1" NA
Apr 29 41° 65° 21° (1994) 91° (1926) 0.1" NA
Apr 30 41° 65° 18° (1907) 97° (1926) 0.1" NA
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