Earliest and Latest Days of 80° F in Boise

This is a list of the earliest and latest days in the year with a high temperature of at least 80 °F in Boise, Idaho history. It is based on NOAA data from the years 1911–2024.

Also see:

Earliest 80 degree day in Boise?

The earliest in the year that Boise, Idaho had a high temperature of at least 80 °F is March 19 which happened in 1997.

Latest 80 degree day in Boise?

The latest in the year that Boise, Idaho had a high temperature of at least 80 °F is October 27 which happened in 1990.

Earliest Days ≥ 80 °F

Date	Year	Temperature
March 19	1997	80 °F
March 29	1978	81 °F
April 1	1966	82 °F
April 5	1960	80 °F
April 5	1930	81 °F
April 6	1930	84 °F
April 7	1930	80 °F
April 8	1996	82 °F
April 8	1977	81 °F
April 8	1930	80 °F
April 8	1912	80 °F
April 9	1930	80 °F
April 9	1925	80 °F
April 9	1912	80 °F
April 10	2023	82 °F
April 10	1968	80 °F
April 10	1925	83 °F
April 11	1949	80 °F
April 11	1934	82 °F
April 11	1932	80 °F
April 11	1931	80 °F
April 11	1930	80 °F
April 11	1913	80 °F

Latest Days ≥ 80 °F

Date	Year	Temperature
October 27	1990	81 °F
October 25	1990	81 °F
October 25	1926	83 °F
October 25	1924	81 °F
October 22	2003	80 °F
October 22	1915	84 °F
October 21	2003	84 °F
October 21	1915	84 °F
October 20	2023	80 °F
October 20	2003	84 °F
October 20	1947	80 °F
October 20	1927	80 °F
October 19	2014	81 °F
October 19	2003	81 °F
October 19	1973	80 °F
October 19	1927	80 °F
October 18	2003	82 °F
October 17	1931	80 °F
October 17	1914	83 °F
October 16	2023	82 °F
October 16	2019	80 °F
October 16	1991	83 °F
October 16	1939	81 °F
October 16	1927	89 °F
October 16	1926	83 °F