Earliest and Latest Days of 90° F in Watertown

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in Watertown, South Dakota history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 90 degree day in Watertown?

The earliest in the year that Watertown, South Dakota had a high temperature of at least 90 °F is April 18 which happened in 1985.

Latest 90 degree day in Watertown?

The latest in the year that Watertown, South Dakota had a high temperature of at least 90 °F is October 5 which has happened twice, most recently in 1963.

Earliest Days ≥ 90 °F

Date	Year	Temperature
April 18	1985	90 °F
April 20	1980	90 °F
April 21	1980	95 °F
April 25	1962	92 °F
April 28	1910	94 °F
April 30	1992	92 °F
May 1	1959	95 °F
May 3	1949	92 °F
May 4	1949	90 °F
May 4	1926	90 °F
May 5	1909	91 °F
May 6	2016	91 °F
May 6	1918	90 °F
May 8	1934	99 °F
May 8	1916	93 °F
May 9	1987	90 °F
May 9	1928	93 °F
May 9	1911	93 °F
May 10	1987	90 °F
May 11	1900	91 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
October 5	1963	90 °F
October 5	1947	90 °F
October 4	1922	90 °F
October 3	1938	90 °F
October 1	2023	90 °F
October 1	1951	91 °F
September 27	1956	93 °F
September 27	1952	91 °F
September 26	1990	90 °F
September 26	1974	91 °F
September 26	1956	90 °F
September 24	1935	91 °F
September 23	1935	95 °F
September 22	1936	99 °F
September 22	1922	91 °F
September 21	1937	94 °F
September 21	1936	97 °F
September 20	1941	91 °F
September 19	2023	91 °F
September 19	1984	93 °F
September 19	1972	92 °F
September 19	1941	90 °F
September 19	1925	91 °F