Sylvan Lake, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 12° 36° -43° (1963) 68° (1981) 0.39" 5.7"
February 16° 40° -34° (1962) 68° (1958) 0.63" 8.6"
March 21° 46° -30° (1956) 72° (1946) 1.07" 13.1"
April 28° 54° -15° (1966) 84° (1989) 2.06" 10.2"
May 37° 63° 5° (1954) 90° (1969) 3.31" 0.8"
June 46° 73° 19° (1951) 97° (1954) 3.17" 0.2"
July 52° 80° 30° (1971) 100° (1954) 3.02" 0"
August 50° 79° 22° (1966) 96° (1988) 2.38" 0"
September 41° 71° 8° (1961) 97° (1971) 1.5" 0.7"
October 31° 59° -5° (1991) 85° (1963) 1.47" 3.6"
November 21° 44° -25° (1952) 76° (1975) 0.67" 7.6"
December 14° 37° -37° (1964) 68° (1979) 0.52" 7.1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jun 1 42° 69° 27° (1951) 82° (1972) 0.11" NA
Jun 2 42° 69° 22° (1969) 82° (1966) 0.11" NA
Jun 3 43° 70° 20° (1951) 91° (1977) 0.11" NA
Jun 4 43° 70° 19° (1951) 87° (1968) 0.11" NA
Jun 5 43° 70° 27° (1962) 89° (1977) 0.11" NA
Jun 6 44° 71° 24° (1944) 88° (1969) 0.11" NA
Jun 7 44° 71° 29° (1965) 89° (2000) 0.11" NA
Jun 8 44° 71° 29° (1954) 90° (1988) 0.11" NA
Jun 9 44° 72° 24° (1966) 93° (2000) 0.11" NA
Jun 10 45° 72° 28° (1950) 89° (1988) 0.11" NA
Jun 11 45° 72° 27° (1985) 88° (1953) 0.11" NA
Jun 12 45° 72° 31° (1954) 92° (1956) 0.11" NA
Jun 13 45° 73° 28° (1947) 90° (1956) 0.11" NA
Jun 14 46° 73° 22° (1969) 88° (1956) 0.11" NA
Jun 15 46° 73° 27° (1969) 92° (1956) 0.11" NA
Jun 16 46° 74° 27° (1966) 89° (1989) 0.11" NA
Jun 17 46° 74° 28° (1966) 88° (1953) 0.11" NA
Jun 18 47° 74° 29° (1945) 90° (1988) 0.1" NA
Jun 19 47° 75° 26° (1946) 95° (1989) 0.1" NA
Jun 20 47° 75° 30° (1946) 90° (1988) 0.1" NA
Jun 21 47° 75° 30° (1972) 94° (1974) 0.1" NA
Jun 22 48° 75° 28° (1960) 89° (1988) 0.1" NA
Jun 23 48° 76° 35° (1964) 97° (1954) 0.1" NA
Jun 24 48° 76° 32° (1960) 96° (1988) 0.1" NA
Jun 25 49° 76° 27° (1958) 92° (2007) 0.1" NA
Jun 26 49° 76° 29° (1958) 92° (1990) 0.1" NA
Jun 27 49° 77° 32° (1985) 95° (1974) 0.1" NA
Jun 28 49° 77° 32° (1951) 92° (2002) 0.1" NA
Jun 29 49° 77° 36° (1950) 95° (2002) 0.1" NA
Jun 30 50° 77° 32° (1954) 95° (1961) 0.1" NA
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