Swan Lake, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 28° -44° (1912) 70° (2002) 0.43" 3.8"
February 12° 33° -35° (1936) 72° (1982) 0.53" 4.1"
March 23° 44° -21° (1913) 92° (1943) 1.56" 5"
April 35° 60° 1° (1936) 97° (1926) 2.73" 2.2"
May 47° 71° 19° (1909) 109° (1934) 3.64" 0.1"
June 58° 80° 33° (1935) 108° (1931) 4.36" 0"
July 62° 84° 38° (1971) 113° (1936) 3.28" 0"
August 59° 82° 32° (1986) 111° (1936) 2.85" 0"
September 49° 75° 19° (1984) 106° (1971) 2.93" 0.1"
October 36° 62° -6° (1925) 95° (1963) 2.15" 0.6"
November 23° 44° -20° (1977) 82° (1999) 1.37" 5.4"
December 11° 30° -39° (1917) 67° (1998) 0.59" 6.3"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 29° 53° 2° (1924) 87° (1963) 0.08" 0.1"
Apr 2 30° 53° 9° (1975) 86° (1921) 0.08" 0.1"
Apr 3 30° 54° 1° (1936) 84° (1981) 0.08" 0.1"
Apr 4 30° 54° 10° (1975) 85° (1930) 0.08" 0.2"
Apr 5 31° 55° 12° (1994) 89° (1929) 0.08" 0"
Apr 6 31° 55° 9° (1982) 89° (1991) 0.08" 0.1"
Apr 7 32° 56° 10° (1936) 91° (1991) 0.08" 0.1"
Apr 8 32° 56° 10° (1997) 88° (1931) 0.08" 0.1"
Apr 9 32° 57° 10° (1928) 88° (1988) 0.09" 0.1"
Apr 10 33° 57° 15° (1989) 85° (1977) 0.08" 0.1"
Apr 11 33° 58° 15° (1940) 86° (1968) 0.09" 0.1"
Apr 12 33° 58° 13° (1939) 88° (1985) 0.09" 0.1"
Apr 13 34° 59° 18° (1907) 90° (1908) 0.09" 0.1"
Apr 14 34° 59° 11° (1928) 93° (1954) 0.09" 0.1"
Apr 15 35° 60° 19° (1986) 88° (1924) 0.09" 0"
Apr 16 35° 60° 18° (1928) 93° (1964) 0.09" 0.1"
Apr 17 35° 61° 13° (1990) 87° (1964) 0.1" 0.1"
Apr 18 36° 61° 18° (1905) 90° (1985) 0.09" 0.1"
Apr 19 36° 62° 17° (1928) 94° (1985) 0.1" 0"
Apr 20 37° 62° 22° (1943) 92° (1987) 0.09" 0.1"
Apr 21 37° 62° 18° (1927) 93° (1980) 0.1" 0.1"
Apr 22 38° 63° 19° (1927) 95° (1980) 0.1" 0"
Apr 23 38° 63° 21° (1996) 92° (1990) 0.1" 0.1"
Apr 24 38° 64° 19° (1918) 90° (1906) 0.1" 0"
Apr 25 39° 64° 23° (1928) 95° (1962) 0.1" 0.1"
Apr 26 39° 64° 24° (1931) 90° (1981) 0.1" 0"
Apr 27 40° 65° 20° (1928) 90° (1987) 0.1" 0"
Apr 28 40° 65° 23° (1926) 91° (1981) 0.1" 0.1"
Apr 29 40° 66° 21° (1994) 91° (1926) 0.1" 0"
Apr 30 41° 66° 18° (1907) 97° (1926) 0.1" 0"
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