Alton, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 23° 40° -16° (1982) 72° (1950) 2.42" 5.1"
February 27° 44° -15° (1996) 76° (2000) 2.67" 4.4"
March 36° 55° -1° (1960) 85° (1986) 3.18" 3.4"
April 47° 67° 20° (1982) 92° (1952) 4.25" 0.4"
May 57° 76° 32° (1966) 98° (1953) 5.12" 0"
June 66° 85° 44° (1998) 107° (1952) 3.48" 0"
July 71° 89° 50° (1972) 111° (1954) 3.64" 0"
August 69° 88° 46° (1986) 106° (1953) 3.15" 0"
September 61° 81° 37° (1974) 103° (1954) 3.3" 0"
October 49° 69° 25° (1981) 97° (2006) 3.29" 0"
November 39° 56° 4° (1964) 84° (1950) 3.91" 0.6"
December 27° 43° -16° (1989) 73° (1984) 2.98" 1.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Mar 1 31° 49° 3° (1960) 81° (1972) 0.08" NA
Mar 2 31° 49° 6° (1980) 74° (1976) 0.09" NA
Mar 3 31° 50° 9° (1980) 77° (1976) 0.08" NA
Mar 4 32° 50° 4° (1978) 79° (1974) 0.08" NA
Mar 5 32° 50° -1° (1960) 81° (1956) 0.09" NA
Mar 6 32° 51° 4° (1960) 82° (1956) 0.09" NA
Mar 7 33° 51° 14° (1996) 78° (1987) 0.09" NA
Mar 8 33° 51° 4° (1996) 80° (1974) 0.09" NA
Mar 9 33° 52° 3° (1996) 79° (1974) 0.09" NA
Mar 10 34° 52° 13° (1969) 82° (1955) 0.09" NA
Mar 11 34° 53° 7° (1979) 80° (2009) 0.1" NA
Mar 12 34° 53° 9° (1998) 81° (1972) 0.09" NA
Mar 13 35° 53° 9° (1998) 80° (1990) 0.09" NA
Mar 14 35° 54° 11° (1993) 78° (1953) 0.1" NA
Mar 15 36° 54° 11° (1993) 77° (1971) 0.09" NA
Mar 16 36° 55° 19° (1997) 76° (1995) 0.11" NA
Mar 17 36° 55° 21° (1970) 77° (1995) 0.11" NA
Mar 18 37° 55° 16° (1965) 77° (1989) 0.1" NA
Mar 19 37° 56° 11° (1965) 74° (1995) 0.11" NA
Mar 20 37° 56° 13° (1965) 72° (1953) 0.11" NA
Mar 21 38° 57° 16° (1951) 80° (1966) 0.11" NA
Mar 22 38° 57° 18° (2002) 82° (1997) 0.11" NA
Mar 23 38° 57° 18° (2002) 73° (1963) 0.12" NA
Mar 24 39° 58° 2° (1974) 81° (1967) 0.11" NA
Mar 25 39° 58° 8° (1974) 82° (2007) 0.11" NA
Mar 26 39° 59° 4° (1955) 83° (1991) 0.11" NA
Mar 27 40° 59° 17° (1955) 83° (1991) 0.12" NA
Mar 28 40° 60° 25° (1955) 80° (2007) 0.12" NA
Mar 29 40° 60° 22° (1964) 85° (1963) 0.13" NA
Mar 30 41° 60° 20° (1964) 84° (1986) 0.13" NA
Mar 31 41° 61° 23° (1969) 85° (1986) 0.13" NA
Advertisements
Track Severe Weather on mobile