Earliest and Latest Days of 80° F in Janesville

This is a list of the earliest and latest days in the year with a high temperature of at least 80 °F in Janesville, Wisconsin history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 80 degree day in Janesville?

The earliest in the year that Janesville, Wisconsin had a high temperature of at least 80 °F is March 16 which happened in 2012.

Latest 80 degree day in Janesville?

The latest in the year that Janesville, Wisconsin had a high temperature of at least 80 °F is October 31 which happened in 1950.

Earliest Days ≥ 80 °F

Date	Year	Temperature
March 16	2012	80 °F
March 19	2012	80 °F
March 21	2012	82 °F
March 22	2012	83 °F
March 23	2012	80 °F
March 27	1945	81 °F
March 29	1986	83 °F
March 30	1998	80 °F
March 30	1986	80 °F
March 31	1986	83 °F
March 31	1981	80 °F
April 1	1946	83 °F
April 2	2010	83 °F
April 2	1981	80 °F
April 2	1963	80 °F
April 5	1988	81 °F
April 7	2021	80 °F
April 7	1991	84 °F
April 7	1893	87 °F
April 8	2001	80 °F

Latest Days ≥ 80 °F

Date	Year	Temperature
October 31	1950	80 °F
October 26	1963	81 °F
October 25	2023	81 °F
October 24	1973	80 °F
October 24	1963	80 °F
October 23	1963	83 °F
October 22	1975	80 °F
October 22	1963	82 °F
October 22	1953	83 °F
October 22	1947	83 °F
October 21	2017	80 °F
October 21	2003	80 °F
October 21	1979	80 °F
October 21	1978	81 °F
October 21	1953	84 °F
October 21	1947	84 °F
October 20	1953	86 °F
October 19	1953	84 °F
October 18	2016	83 °F
October 18	1965	80 °F
October 18	1953	85 °F
October 18	1950	84 °F
October 18	1947	83 °F