Earliest and Latest Days of 90° F in Winthrop

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in Winthrop, Washington history. It is based on NOAA data from the years 1906–2024.

Also see:

Earliest 90 degree day in Winthrop?

The earliest in the year that Winthrop, Washington had a high temperature of at least 90 °F is May 5 which happened in 1966.

Latest 90 degree day in Winthrop?

The latest in the year that Winthrop, Washington had a high temperature of at least 90 °F is September 28 which has happened 3 times, most recently in 1994.

Earliest Days ≥ 90 °F

Date	Year	Temperature
May 5	1966	91 °F
May 6	1992	92 °F
May 6	1966	90 °F
May 7	1992	91 °F
May 8	1987	91 °F
May 9	1987	90 °F
May 9	1949	91 °F
May 10	2013	91 °F
May 10	1949	90 °F
May 11	1949	93 °F
May 11	1924	92 °F
May 12	1993	96 °F
May 12	1949	92 °F
May 12	1931	90 °F
May 12	1924	92 °F
May 13	1993	96 °F
May 13	1949	90 °F
May 13	1924	91 °F
May 14	1949	91 °F
May 14	1939	90 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
September 28	1994	91 °F
September 28	1963	90 °F
September 28	1918	90 °F
September 27	1994	91 °F
September 27	1919	90 °F
September 27	1918	90 °F
September 25	2003	96 °F
September 25	1994	90 °F
September 25	1974	90 °F
September 24	1990	91 °F
September 24	1987	90 °F
September 23	1987	91 °F
September 23	1966	90 °F
September 23	1917	90 °F
September 22	1987	91 °F
September 22	1966	90 °F
September 21	1967	91 °F
September 21	1939	91 °F
September 20	1979	90 °F
September 20	1918	92 °F