Earliest and Latest Days of 100° F in Belleville

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Belleville, Illinois history. It is based on NOAA data from the years 1948–2024.

Also see:

Earliest 100 degree day in Belleville?

The earliest in the year that Belleville, Illinois had a high temperature of at least 100 °F is June 15 which happened in 1952.

Latest 100 degree day in Belleville?

The latest in the year that Belleville, Illinois had a high temperature of at least 100 °F is September 29 which happened in 1953.

Earliest Days ≥ 100 °F

Date	Year	Temperature
June 15	1952	100 °F
June 16	1952	100 °F
June 19	1953	102 °F
June 20	1953	102 °F
June 24	1988	101 °F
June 25	1988	100 °F
June 25	1952	100 °F
June 26	1988	100 °F
June 26	1971	100 °F
June 26	1954	103 °F
June 27	1954	101 °F
June 27	1952	101 °F
June 28	2012	106 °F
June 28	1952	101 °F
June 29	2012	106 °F
June 29	1952	104 °F
June 30	2012	103 °F
June 30	2005	100 °F
July 1	2012	101 °F
July 1	1980	104 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 29	1953	101 °F
September 15	1971	100 °F
September 14	1971	101 °F
September 6	1990	101 °F
September 6	1954	102 °F
September 5	1990	100 °F
September 5	1954	103 °F
September 4	1954	102 °F
September 2	2011	100 °F
September 2	1954	100 °F
September 1	2011	100 °F
September 1	1953	100 °F
August 28	1990	100 °F
August 24	2007	100 °F
August 23	2007	100 °F
August 22	2003	100 °F
August 21	2003	101 °F
August 20	1983	100 °F
August 20	1962	103 °F
August 19	1962	103 °F