Rock Grove, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 28° -27° (1985) 61° (2002) 1.37" 9"
February 16° 34° -27° (1996) 65° (1999) 1.58" 6.5"
March 26° 46° -8° (2002) 85° (1986) 2.08" 3.5"
April 37° 60° 9° (1982) 92° (1980) 3.3" 0.8"
May 48° 71° 25° (2005) 95° (1985) 3.99" 0"
June 58° 80° 38° (1993) 100° (1988) 4.61" 0"
July 62° 84° 46° (1979) 101° (1988) 3.94" 0"
August 60° 82° 40° (1986) 101° (1988) 4.29" 0"
September 50° 74° 28° (1984) 96° (1985) 3.66" 0"
October 39° 62° 15° (1988) 90° (1997) 2.88" 0"
November 29° 47° -5° (1977) 77° (2000) 2.66" 1.8"
December 16° 32° -23° (2000) 67° (2001) 1.76" 9.7"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Mar 1 20° 39° 0° (1980) 59° (2004) 0.06" 0.2"
Mar 2 21° 39° -6° (1980) 66° (1992) 0.06" 0.1"
Mar 3 21° 40° -1° (1980) 65° (1983) 0.06" 0.2"
Mar 4 22° 40° -8° (2002) 71° (1983) 0.07" 0.1"
Mar 5 22° 41° -6° (1978) 67° (1983) 0.06" 0.1"
Mar 6 22° 41° -1° (1978) 69° (1983) 0.06" 0.2"
Mar 7 23° 41° -2° (1996) 70° (2000) 0.06" 0.1"
Mar 8 23° 42° -4° (1996) 77° (2000) 0.06" 0.2"
Mar 9 23° 42° -5° (1975) 74° (2000) 0.07" 0.2"
Mar 10 24° 43° -2° (2003) 67° (1977) 0.05" 0.1"
Mar 11 24° 43° 1° (2003) 64° (1977) 0.07" 0.1"
Mar 12 25° 44° 8° (1979) 70° (1990) 0.06" 0.2"
Mar 13 25° 44° 3° (1975) 77° (1990) 0.06" 0.1"
Mar 14 25° 45° 4° (1975) 73° (2007) 0.06" 0.1"
Mar 15 26° 45° 5° (1993) 73° (1995) 0.06" 0.1"
Mar 16 26° 46° 7° (1975) 68° (1995) 0.07" 0.1"
Mar 17 26° 46° 10° (1993) 68° (1995) 0.06" 0.2"
Mar 18 27° 47° 10° (1993) 74° (2009) 0.07" 0.1"
Mar 19 27° 47° 12° (1993) 69° (1976) 0.07" 0.1"
Mar 20 27° 47° 7° (1986) 75° (1976) 0.07" 0.1"
Mar 21 28° 48° 9° (1986) 67° (1976) 0.07" 0"
Mar 22 28° 48° 13° (2002) 69° (1991) 0.07" 0.1"
Mar 23 29° 49° 9° (1974) 69° (1994) 0.07" 0.1"
Mar 24 29° 49° 0° (1974) 70° (1994) 0.07" 0.1"
Mar 25 29° 50° 0° (1974) 70° (2003) 0.07" 0.1"
Mar 26 30° 50° 11° (1996) 77° (2007) 0.07" 0"
Mar 27 30° 51° 11° (1996) 78° (1991) 0.08" 0.1"
Mar 28 30° 51° 15° (1996) 75° (1989) 0.08" 0.1"
Mar 29 31° 52° 17° (1982) 79° (1998) 0.08" 0.1"
Mar 30 31° 52° 15° (1975) 85° (1986) 0.08" 0"
Mar 31 31° 53° 15° (1975) 75° (2005) 0.08" 0.1"
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