Earliest and Latest Days of 100° F in Winthrop

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Winthrop, Washington history. It is based on NOAA data from the years 1906–2024.

Also see:

Earliest 100 degree day in Winthrop?

The earliest in the year that Winthrop, Washington had a high temperature of at least 100 °F is May 31 which happened in 1986.

Latest 100 degree day in Winthrop?

The latest in the year that Winthrop, Washington had a high temperature of at least 100 °F is September 4 which happened in 1988.

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 31	1986	100 °F
June 1	1986	100 °F
June 22	1958	100 °F
June 23	1992	100 °F
June 24	1992	100 °F
June 25	1926	102 °F
June 26	1925	103 °F
June 27	2021	102 °F
June 27	2015	100 °F
June 28	2021	104 °F
June 28	2015	103 °F
June 29	2021	107 °F
June 30	2021	109 °F
June 30	1924	101 °F
July 1	2021	106 °F
July 1	1924	104 °F
July 2	2013	100 °F
July 2	1924	105 °F
July 3	2015	100 °F
July 3	1924	101 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 4	1988	100 °F
September 3	1988	100 °F
August 29	1916	100 °F
August 26	1966	100 °F
August 25	1966	101 °F
August 24	1970	100 °F
August 24	1966	100 °F
August 23	1970	101 °F
August 22	1970	100 °F
August 22	1915	100 °F
August 21	1977	100 °F
August 20	1977	101 °F
August 19	1977	101 °F
August 19	1967	101 °F
August 19	1942	100 °F
August 18	2020	101 °F
August 18	2008	102 °F
August 18	1977	102 °F
August 18	1967	104 °F
August 17	2023	100 °F
August 17	2008	101 °F
August 17	1977	100 °F
August 17	1967	104 °F