Earliest and Latest Days of 90° F in Rockford

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in Rockford, Illinois history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 90 degree day in Rockford?

The earliest in the year that Rockford, Illinois had a high temperature of at least 90 °F is April 10 which happened in 1930.

Latest 90 degree day in Rockford?

The latest in the year that Rockford, Illinois had a high temperature of at least 90 °F is October 9 which happened in 2010.

Earliest Days ≥ 90 °F

Date	Year	Temperature
April 10	1930	93 °F
April 18	2002	91 °F
April 22	1980	91 °F
April 25	1986	90 °F
April 26	1986	90 °F
April 29	1915	90 °F
April 30	1942	91 °F
May 3	1938	91 °F
May 4	1959	90 °F
May 4	1952	92 °F
May 4	1949	90 °F
May 5	1959	91 °F
May 5	1949	93 °F
May 6	1934	95 °F
May 6	1896	90 °F
May 7	1896	91 °F
May 8	1896	92 °F
May 9	1936	90 °F
May 9	1934	96 °F
May 9	1896	92 °F
May 9	1895	92 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
October 9	2010	90 °F
October 6	1963	90 °F
October 5	1922	90 °F
October 4	1922	90 °F
October 3	1997	90 °F
October 3	1922	90 °F
October 2	1922	91 °F
October 1	1971	90 °F
September 30	2021	90 °F
September 30	1971	92 °F
September 29	1953	94 °F
September 28	1952	91 °F
September 27	2021	90 °F
September 26	2017	90 °F
September 26	1998	90 °F
September 26	1920	92 °F
September 25	2017	92 °F
September 25	1920	95 °F
September 24	2017	90 °F
September 24	2007	92 °F
September 24	1935	90 °F
September 24	1920	92 °F