Sylvan Lake, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 15° 37° -43° (1963) 68° (1981) 0.33" 6.4"
February 17° 38° -34° (1962) 68° (1958) 0.7" 10.3"
March 22° 45° -30° (1956) 72° (1946) 1.03" 12"
April 29° 53° -15° (1966) 84° (1989) 2.04" 10.6"
May 39° 62° 5° (1954) 90° (1969) 3.58" 1.2"
June 47° 72° 19° (1951) 97° (1954) 2.83" 0"
July 54° 80° 30° (1971) 100° (1954) 2.75" 0"
August 53° 79° 22° (1966) 96° (1988) 2.33" 0"
September 43° 70° 8° (1961) 97° (1971) 1.67" 0.2"
October 32° 57° -5° (1991) 85° (1963) 1.47" 3.6"
November 23° 44° -25° (1952) 76° (1975) 0.58" 6.1"
December 15° 36° -37° (1964) 68° (1979) 0.37" 5.5"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 17° 38° -16° (1954) 60° (1969) 0.01" 0.2"
Dec 2 17° 37° -12° (1954) 64° (1969) 0.02" 0.1"
Dec 3 17° 37° -7° (1978) 63° (1959) 0.01" 0.2"
Dec 4 17° 37° -9° (1972) 63° (1987) 0.01" 0.2"
Dec 5 16° 36° -25° (1972) 60° (1963) 0.02" 0.2"
Dec 6 16° 36° -27° (1972) 60° (1963) 0.01" 0.1"
Dec 7 16° 36° -16° (2005) 56° (1970) 0.01" 0.2"
Dec 8 16° 36° -26° (1972) 59° (1990) 0.01" 0.2"
Dec 9 15° 36° -25° (1977) 64° (1990) 0.01" 0.1"
Dec 10 15° 36° -18° (1961) 62° (1990) 0.01" 0.2"
Dec 11 15° 35° -21° (1961) 61° (1981) 0.01" 0.1"
Dec 12 15° 35° -20° (1961) 58° (1993) 0.02" 0.2"
Dec 13 15° 35° -19° (1961) 56° (1962) 0.01" 0.1"
Dec 14 15° 35° -16° (1967) 62° (1997) 0.01" 0.2"
Dec 15 15° 35° -25° (1945) 62° (1952) 0.01" 0.2"
Dec 16 14° 35° -20° (1989) 63° (1962) 0.01" 0.1"
Dec 17 14° 35° -37° (1964) 62° (1962) 0.01" 0.2"
Dec 18 14° 35° -34° (1964) 66° (1976) 0.01" 0.2"
Dec 19 14° 35° -22° (1990) 68° (1979) 0.02" 0.1"
Dec 20 14° 35° -25° (1951) 60° (1954) 0.01" 0.2"
Dec 21 14° 35° -30° (1990) 58° (2003) 0.01" 0.2"
Dec 22 14° 35° -29° (1983) 62° (1954) 0.01" 0.2"
Dec 23 14° 35° -34° (1983) 58° (1994) 0.01" 0.2"
Dec 24 14° 35° -26° (1944) 57° (1999) 0.02" 0.2"
Dec 25 14° 36° -22° (1944) 60° (1960) 0.01" 0.2"
Dec 26 14° 36° -22° (1962) 55° (1963) 0.01" 0.2"
Dec 27 14° 36° -12° (1964) 60° (1947) 0.01" 0.2"
Dec 28 14° 36° -29° (1990) 62° (1980) 0.02" 0.2"
Dec 29 14° 36° -24° (1946) 56° (1956) 0.01" 0.2"
Dec 30 15° 36° -23° (1978) 56° (1956) 0.01" 0.2"
Dec 31 15° 36° -28° (1978) 61° (1962) 0.01" 0.2"
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