Raritan, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 15° 33° -23° (1982) 70° (1950) 1.49" 7"
February 19° 38° -30° (1905) 76° (1930) 1.83" 5.5"
March 29° 50° -13° (1960) 88° (1910) 2.66" 3.8"
April 41° 63° 9° (1975) 94° (1930) 3.9" 1.1"
May 51° 73° 26° (1906) 105° (1934) 4.8" 0"
June 61° 82° 37° (1903) 108° (1934) 4.75" 0"
July 65° 86° 42° (1975) 110° (1936) 4.64" 0"
August 63° 85° 36° (1915) 113° (1934) 3.73" 0"
September 53° 77° 25° (1942) 103° (1913) 3.79" 0"
October 42° 65° 1° (1925) 96° (2006) 3.09" 0.1"
November 31° 51° -3° (1929) 83° (1950) 2.94" 1.8"
December 19° 37° -26° (1924) 72° (1998) 2.28" 5.8"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 46° 69° 29° (1903) 89° (1952) 0.14" NA
May 2 46° 69° 28° (1911) 89° (1968) 0.14" NA
May 3 47° 69° 29° (1909) 89° (1928) 0.15" NA
May 4 47° 70° 27° (1907) 92° (1952) 0.15" NA
May 5 47° 70° 32° (1907) 92° (1952) 0.14" NA
May 6 48° 70° 28° (1989) 92° (1934) 0.15" NA
May 7 48° 70° 26° (1906) 90° (1965) 0.15" NA
May 8 48° 71° 30° (1989) 90° (1963) 0.14" NA
May 9 49° 71° 28° (1906) 92° (1911) 0.15" NA
May 10 49° 71° 28° (1966) 90° (1911) 0.15" NA
May 11 49° 72° 30° (1907) 90° (1956) 0.15" NA
May 12 50° 72° 35° (1928) 95° (1956) 0.17" NA
May 13 50° 72° 34° (1901) 93° (1915) 0.16" NA
May 14 50° 73° 31° (1920) 91° (1911) 0.16" NA
May 15 51° 73° 33° (1926) 94° (1911) 0.17" NA
May 16 51° 73° 32° (1907) 94° (1911) 0.15" NA
May 17 51° 73° 36° (1973) 95° (1911) 0.16" NA
May 18 52° 74° 33° (2002) 93° (1911) 0.16" NA
May 19 52° 74° 36° (2002) 91° (1934) 0.16" NA
May 20 52° 74° 32° (1954) 93° (1934) 0.16" NA
May 21 53° 75° 33° (2002) 94° (1934) 0.16" NA
May 22 53° 75° 35° (1963) 94° (1925) 0.16" NA
May 23 53° 75° 37° (1917) 91° (1925) 0.16" NA
May 24 54° 76° 39° (1924) 98° (1911) 0.16" NA
May 25 54° 76° 31° (1925) 100° (1911) 0.16" NA
May 26 55° 76° 35° (1901) 99° (1911) 0.16" NA
May 27 55° 76° 37° (1961) 97° (1911) 0.15" NA
May 28 55° 77° 37° (1928) 93° (2006) 0.16" NA
May 29 56° 77° 37° (1901) 100° (1934) 0.15" NA
May 30 56° 77° 35° (1901) 98° (1934) 0.16" NA
May 31 56° 78° 41° (1924) 105° (1934) 0.16" NA
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