Earliest and Latest Days of 100° F in Galesburg

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Galesburg, Illinois history. It is based on NOAA data from the years 1895–2024.

Also see:

Earliest 100 degree day in Galesburg?

The earliest in the year that Galesburg, Illinois had a high temperature of at least 100 °F is June 25 which happened in 1988.

Latest 100 degree day in Galesburg?

The latest in the year that Galesburg, Illinois had a high temperature of at least 100 °F is September 5 which happened in 1899.

Earliest Days ≥ 100 °F

Date	Year	Temperature
June 25	1988	101 °F
June 29	1936	102 °F
July 1	1956	100 °F
July 4	1936	103 °F
July 4	1901	101 °F
July 5	1936	104 °F
July 6	1936	102 °F
July 7	1936	104 °F
July 8	1936	106 °F
July 9	1936	102 °F
July 10	1936	102 °F
July 10	1901	106 °F
July 11	1936	100 °F
July 11	1901	103 °F
July 12	1966	100 °F
July 12	1936	108 °F
July 13	1995	100 °F
July 13	1966	100 °F
July 13	1936	106 °F
July 14	1936	109 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 5	1899	100 °F
August 31	1953	100 °F
August 22	1936	100 °F
August 20	1983	100 °F
August 18	1988	100 °F
August 18	1983	100 °F
August 18	1936	102 °F
August 17	1988	101 °F
August 17	1983	101 °F
August 16	1988	100 °F
August 15	1988	100 °F
August 13	1936	100 °F
August 8	1988	100 °F
August 5	1900	100 °F
July 31	1988	100 °F
July 29	1941	100 °F
July 28	1983	102 °F
July 27	1936	101 °F
July 26	2012	100 °F
July 26	1936	105 °F
July 26	1901	100 °F