Opal, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 27° -32° (1985) 69° (2005) 0.57" NA
February 12° 34° -36° (1994) 72° (2005) 0.65" NA
March 20° 43° -26° (1998) 83° (2007) 1.47" NA
April 31° 57° -2° (1997) 93° (1989) 2.03" NA
May 43° 68° 18° (2005) 101° (2006) 2.75" NA
June 52° 79° 30° (1979) 110° (2002) 2.9" NA
July 58° 87° 39° (1983) 114° (1977) 2.24" NA
August 55° 86° 35° (1992) 110° (1988) 1.36" NA
September 44° 75° 20° (1995) 107° (2001) 0.96" NA
October 31° 61° -10° (1991) 95° (1997) 1.35" NA
November 19° 42° -24° (1985) 82° (1999) 0.75" NA
December 31° -36° (1990) 69° (1998) 0.78" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 37° 63° 22° (1984) 93° (1992) 0.08" NA
May 2 37° 64° 21° (2005) 87° (1987) 0.08" NA
May 3 38° 64° 18° (2005) 92° (1985) 0.08" NA
May 4 38° 64° 25° (1991) 84° (1986) 0.08" NA
May 5 39° 65° 23° (2006) 90° (1986) 0.08" NA
May 6 39° 65° 22° (1989) 89° (2004) 0.08" NA
May 7 39° 66° 26° (1980) 86° (1992) 0.08" NA
May 8 40° 66° 21° (1980) 93° (1985) 0.08" NA
May 9 40° 66° 29° (2002) 88° (1985) 0.08" NA
May 10 41° 66° 24° (1990) 88° (1985) 0.09" NA
May 11 41° 67° 21° (1979) 85° (1987) 0.09" NA
May 12 41° 67° 26° (1979) 89° (1977) 0.09" NA
May 13 42° 67° 26° (2004) 88° (1977) 0.09" NA
May 14 42° 68° 25° (1983) 94° (2001) 0.09" NA
May 15 43° 68° 30° (1983) 88° (1976) 0.09" NA
May 16 43° 68° 29° (1988) 95° (1987) 0.09" NA
May 17 43° 69° 29° (1992) 90° (1987) 0.09" NA
May 18 44° 69° 33° (2000) 92° (1998) 0.09" NA
May 19 44° 69° 23° (1979) 93° (1992) 0.09" NA
May 20 44° 70° 32° (1979) 96° (1992) 0.09" NA
May 21 45° 70° 36° (2001) 95° (1980) 0.09" NA
May 22 45° 70° 33° (1987) 95° (1980) 0.09" NA
May 23 45° 71° 27° (1979) 93° (2006) 0.09" NA
May 24 46° 71° 23° (2002) 94° (1985) 0.09" NA
May 25 46° 71° 32° (1984) 90° (1985) 0.09" NA
May 26 46° 72° 27° (1992) 89° (1983) 0.09" NA
May 27 47° 72° 31° (1992) 101° (2006) 0.1" NA
May 28 47° 73° 33° (1984) 89° (1979) 0.1" NA
May 29 47° 73° 34° (2005) 88° (2002) 0.1" NA
May 30 47° 73° 34° (1975) 90° (1988) 0.1" NA
May 31 48° 74° 34° (1983) 90° (1988) 0.1" NA
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