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
Apr 1 25° 49° 4° (1962) 74° (2004) 0.04" 0.4"
Apr 2 26° 49° -8° (1975) 74° (2004) 0.04" 0.4"
Apr 3 26° 49° 0° (2002) 71° (1943) 0.04" 0.4"
Apr 4 26° 50° -2° (1945) 69° (1991) 0.04" 0.3"
Apr 5 26° 50° 9° (1971) 72° (1991) 0.04" 0.5"
Apr 6 26° 50° 9° (2007) 72° (1991) 0.05" 0.4"
Apr 7 27° 50° -2° (2007) 75° (1991) 0.05" 0.4"
Apr 8 27° 51° -2° (1997) 73° (1988) 0.05" 0.4"
Apr 9 27° 51° 2° (1961) 75° (2005) 0.05" 0.4"
Apr 10 27° 51° 4° (1959) 76° (1977) 0.06" 0.4"
Apr 11 28° 51° -5° (1953) 75° (1960) 0.07" 0.4"
Apr 12 28° 52° -5° (1957) 76° (1960) 0.07" 0.5"
Apr 13 28° 52° 2° (1959) 76° (1976) 0.07" 0.4"
Apr 14 28° 52° 0° (1986) 70° (2003) 0.07" 0.4"
Apr 15 29° 52° 12° (1961) 75° (1985) 0.07" 0.4"
Apr 16 29° 53° 0° (1951) 74° (1988) 0.07" 0.3"
Apr 17 29° 53° 7° (1961) 75° (2005) 0.07" 0.4"
Apr 18 30° 53° 7° (1953) 79° (1987) 0.08" 0.4"
Apr 19 30° 54° -1° (1966) 75° (1980) 0.07" 0.3"
Apr 20 30° 54° -15° (1966) 78° (1989) 0.07" 0.4"
Apr 21 30° 54° 1° (1966) 84° (1989) 0.08" 0.3"
Apr 22 31° 55° 15° (1954) 81° (1989) 0.08" 0.3"
Apr 23 31° 55° 3° (1963) 74° (1994) 0.08" 0.3"
Apr 24 31° 55° 15° (1947) 74° (1994) 0.08" 0.3"
Apr 25 32° 56° 13° (1961) 78° (1962) 0.08" 0.3"
Apr 26 32° 56° 11° (1958) 78° (1952) 0.09" 0.2"
Apr 27 32° 56° 10° (1994) 77° (1952) 0.09" 0.3"
Apr 28 33° 57° 14° (1956) 80° (1987) 0.09" 0.2"
Apr 29 33° 57° 11° (1958) 77° (2001) 0.1" 0.3"
Apr 30 33° 57° 9° (1956) 79° (1992) 0.1" 0.2"
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