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
Feb 1 12° 30° -23° (1985) 62° (1989) 0.04" 0.3"
Feb 2 12° 30° -22° (1996) 47° (1987) 0.05" 0.3"
Feb 3 12° 30° -26° (1996) 52° (1987) 0.05" 0.3"
Feb 4 12° 30° -27° (1996) 54° (1992) 0.04" 0.3"
Feb 5 13° 31° -20° (1996) 49° (2005) 0.04" 0.2"
Feb 6 13° 31° -16° (1979) 50° (1990) 0.04" 0.3"
Feb 7 13° 31° -17° (1977) 48° (1987) 0.05" 0.2"
Feb 8 13° 31° -18° (1985) 52° (2009) 0.05" 0.3"
Feb 9 14° 32° -17° (1979) 57° (1990) 0.05" 0.2"
Feb 10 14° 32° -20° (1994) 52° (2009) 0.05" 0.3"
Feb 11 14° 32° -20° (1994) 58° (1999) 0.06" 0.2"
Feb 12 14° 33° -11° (1994) 65° (1999) 0.05" 0.3"
Feb 13 15° 33° -11° (1986) 57° (1976) 0.06" 0.2"
Feb 14 15° 33° -9° (1988) 47° (1984) 0.05" 0.2"
Feb 15 15° 34° -8° (2007) 60° (2006) 0.06" 0.3"
Feb 16 16° 34° -8° (2007) 59° (1976) 0.05" 0.2"
Feb 17 16° 34° -10° (1980) 57° (1981) 0.06" 0.2"
Feb 18 16° 35° -13° (2006) 62° (1981) 0.06" 0.3"
Feb 19 17° 35° -16° (1979) 58° (1981) 0.06" 0.2"
Feb 20 17° 35° -14° (1979) 58° (1981) 0.05" 0.2"
Feb 21 17° 36° -5° (2008) 61° (1983) 0.06" 0.2"
Feb 22 18° 36° -9° (1978) 53° (1991) 0.06" 0.2"
Feb 23 18° 36° -5° (1989) 61° (1984) 0.06" 0.2"
Feb 24 18° 37° -10° (1993) 60° (1984) 0.06" 0.2"
Feb 25 19° 37° -10° (1993) 59° (1976) 0.07" 0.2"
Feb 26 19° 38° -1° (1994) 61° (2000) 0.06" 0.2"
Feb 27 20° 38° -9° (1994) 61° (2000) 0.07" 0.1"
Feb 28 20° 38° -8° (1994) 65° (1976) 0.06" 0.2"
Feb 29 20° 39° -4° (1980) 62° (2000) 0.06" NA
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