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
Dec 1 16° 35° -10° (1983) 60° (1961) 0.03" 0.2"
Dec 2 15° 34° -13° (1919) 67° (1998) 0.03" 0.3"
Dec 3 15° 34° -13° (1919) 65° (1998) 0.03" 0.2"
Dec 4 14° 33° -13° (1978) 65° (1998) 0.02" 0.3"
Dec 5 14° 33° -13° (1950) 57° (1963) 0.03" 0.3"
Dec 6 13° 32° -20° (2005) 67° (1939) 0.02" 0.2"
Dec 7 13° 32° -19° (1976) 59° (1918) 0.03" 0.3"
Dec 8 13° 32° -24° (1976) 64° (1970) 0.02" 0.3"
Dec 9 12° 31° -17° (1976) 64° (1957) 0.02" 0.2"
Dec 10 12° 31° -22° (1919) 63° (2006) 0.02" 0.3"
Dec 11 12° 31° -13° (1927) 60° (1913) 0.03" 0.2"
Dec 12 11° 30° -26° (1932) 58° (1921) 0.02" 0.3"
Dec 13 11° 30° -32° (1917) 63° (1921) 0.01" 0.2"
Dec 14 11° 30° -22° (1917) 59° (1960) 0.02" 0.2"
Dec 15 10° 29° -21° (1932) 59° (1998) 0.02" 0.2"
Dec 16 10° 29° -23° (1914) 61° (1939) 0.01" 0.2"
Dec 17 10° 29° -24° (1983) 65° (1939) 0.02" 0.2"
Dec 18 10° 29° -29° (1985) 63° (1923) 0.02" 0.2"
Dec 19 28° -28° (1983) 54° (1976) 0.01" 0.2"
Dec 20 28° -26° (1983) 61° (1941) 0.02" 0.2"
Dec 21 28° -27° (1983) 60° (1933) 0.01" 0.2"
Dec 22 28° -33° (1989) 50° (1941) 0.02" 0.1"
Dec 23 28° -32° (1989) 57° (1936) 0.02" 0.2"
Dec 24 28° -24° (1983) 49° (1928) 0.01" 0.1"
Dec 25 28° -24° (1983) 54° (1946) 0.02" 0.2"
Dec 26 27° -22° (1933) 55° (1956) 0.01" 0.1"
Dec 27 27° -24° (1951) 58° (1928) 0.02" 0.1"
Dec 28 27° -29° (1924) 51° (1972) 0.01" 0.2"
Dec 29 27° -39° (1917) 57° (2002) 0.01" 0.1"
Dec 30 27° -20° (1969) 60° (1999) 0.02" 0.1"
Dec 31 27° -25° (1973) 62° (2004) 0.01" 0.2"
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