Earliest and Latest Days of 100° F in Olney

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Olney, Illinois history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 100 degree day in Olney?

The earliest in the year that Olney, Illinois had a high temperature of at least 100 °F is June 11 which happened in 1914.

Latest 100 degree day in Olney?

The latest in the year that Olney, 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 11	1914	102 °F
June 15	1952	101 °F
June 17	1944	101 °F
June 17	1936	101 °F
June 17	1913	101 °F
June 18	1913	102 °F
June 19	1953	100 °F
June 19	1913	103 °F
June 20	1953	101 °F
June 20	1936	100 °F
June 20	1913	103 °F
June 21	1913	101 °F
June 22	1988	100 °F
June 22	1931	101 °F
June 22	1913	101 °F
June 23	1930	104 °F
June 25	1988	103 °F
June 25	1931	101 °F
June 25	1914	102 °F
June 25	1901	101 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 29	1953	101 °F
September 21	1940	100 °F
September 20	1940	100 °F
September 16	1927	100 °F
September 15	1939	104 °F
September 14	1939	103 °F
September 13	1939	102 °F
September 13	1936	100 °F
September 10	1933	102 °F
September 9	1960	100 °F
September 9	1939	104 °F
September 9	1933	101 °F
September 9	1925	102 °F
September 8	1960	100 °F
September 8	1939	105 °F
September 8	1933	101 °F
September 8	1925	100 °F
September 7	1960	101 °F
September 7	1939	103 °F
September 7	1933	100 °F
September 7	1925	100 °F
September 7	1899	101 °F