Allerton, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 17° 33° -25° (1999) 70° (1909) 2.05" 6.8"
February 20° 38° -25° (1905) 72° (2000) 2.21" 5.8"
March 30° 50° -5° (1906) 85° (1910) 2.86" 2.6"
April 41° 63° 16° (1982) 91° (1986) 3.68" 0.4"
May 52° 73° 26° (1903) 97° (1934) 4.89" 0"
June 62° 83° 37° (1945) 103° (1988) 4.34" 0"
July 65° 85° 41° (1904) 109° (1954) 4.7" 0"
August 63° 84° 39° (1915) 102° (1988) 3.93" 0"
September 54° 78° 29° (1942) 101° (1954) 3.13" 0"
October 43° 65° 13° (1925) 93° (1954) 3.26" 0.1"
November 32° 51° -5° (1950) 80° (1950) 3.68" 0.9"
December 21° 37° -20° (1983) 71° (1998) 2.73" 6.6"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 47° 69° 26° (1903) 88° (1952) 0.14" 0"
May 2 47° 69° 32° (1903) 88° (1959) 0.14" 0"
May 3 47° 69° 31° (2005) 87° (1949) 0.15" 0"
May 4 48° 70° 30° (1954) 91° (1959) 0.15" 0"
May 5 48° 70° 33° (1944) 92° (1952) 0.15" 0"
May 6 48° 70° 29° (1944) 91° (1949) 0.16" 0"
May 7 49° 71° 29° (1989) 86° (1949) 0.16" 0"
May 8 49° 71° 34° (1908) 87° (1963) 0.15" 0"
May 9 49° 71° 31° (1947) 90° (1934) 0.16" 0"
May 10 50° 72° 30° (1966) 89° (1928) 0.17" 0"
May 11 50° 72° 31° (1907) 87° (1987) 0.17" 0"
May 12 50° 72° 34° (1928) 90° (1956) 0.16" 0"
May 13 51° 73° 35° (1938) 90° (1956) 0.17" 0"
May 14 51° 73° 33° (1920) 91° (1987) 0.17" 0"
May 15 51° 73° 35° (1920) 90° (2001) 0.16" 0"
May 16 52° 73° 35° (1997) 92° (2001) 0.16" 0"
May 17 52° 74° 37° (2002) 90° (1962) 0.16" 0"
May 18 52° 74° 35° (2002) 92° (1964) 0.15" 0"
May 19 53° 74° 36° (1929) 92° (1998) 0.16" 0"
May 20 53° 75° 36° (1954) 90° (1977) 0.16" 0"
May 21 53° 75° 33° (1907) 93° (1925) 0.17" 0"
May 22 54° 75° 37° (1924) 94° (1925) 0.16" 0"
May 23 54° 76° 38° (1917) 92° (1975) 0.16" 0"
May 24 54° 76° 38° (1925) 91° (1921) 0.17" 0"
May 25 55° 76° 29° (1925) 94° (1967) 0.16" 0"
May 26 55° 77° 33° (1925) 95° (1911) 0.15" 0"
May 27 56° 77° 37° (1961) 93° (1911) 0.16" 0"
May 28 56° 77° 36° (1907) 94° (1991) 0.15" 0"
May 29 56° 78° 38° (1906) 96° (1934) 0.16" 0"
May 30 57° 78° 39° (1930) 93° (1934) 0.15" 0"
May 31 57° 78° 44° (1910) 97° (1934) 0.15" 0"
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