Earliest and Latest Days of 90° F in Iron River

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in Iron River, Michigan history. It is based on NOAA data from the years 1896–2024.

Also see:

Earliest 90 degree day in Iron River?

The earliest in the year that Iron River, Michigan had a high temperature of at least 90 °F is April 22 which happened in 1980.

Latest 90 degree day in Iron River?

The latest in the year that Iron River, Michigan had a high temperature of at least 90 °F is September 23 which happened in 1937.

Earliest Days ≥ 90 °F

Date	Year	Temperature
April 22	1980	92 °F
May 7	1896	90 °F
May 19	1902	90 °F
May 22	1964	90 °F
May 25	2010	91 °F
May 27	1919	90 °F
May 28	1969	90 °F
May 28	1919	91 °F
May 29	1969	90 °F
May 29	1919	94 °F
May 30	2006	90 °F
May 30	1986	90 °F
May 30	1939	91 °F
May 30	1919	92 °F
May 31	1934	100 °F
June 1	1923	90 °F
June 2	1944	92 °F
June 2	1923	90 °F
June 3	1948	90 °F
June 3	1934	91 °F
June 3	1923	91 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
September 23	1937	91 °F
September 22	1937	91 °F
September 15	1939	91 °F
September 14	1939	92 °F
September 14	1927	92 °F
September 13	1939	90 °F
September 12	1998	94 °F
September 12	1931	90 °F
September 11	1931	94 °F
September 10	1931	94 °F
September 10	1906	92 °F
September 9	1952	90 °F
September 9	1931	91 °F
September 9	1906	90 °F
September 8	1976	95 °F
September 8	1931	95 °F
September 7	1976	95 °F
September 5	2023	91 °F
September 5	1947	90 °F
September 5	1912	91 °F