Earliest and Latest Days of 100° F in Watertown

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Watertown, South Dakota history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 100 degree day in Watertown?

The earliest in the year that Watertown, South Dakota had a high temperature of at least 100 °F is May 28 which happened in 1934.

Latest 100 degree day in Watertown?

The latest in the year that Watertown, South Dakota had a high temperature of at least 100 °F is September 10 which happened in 1931.

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 28	1934	102 °F
May 30	1934	106 °F
May 31	1934	101 °F
June 10	1933	103 °F
June 14	1979	100 °F
June 15	1933	100 °F
June 16	1933	103 °F
June 18	1933	100 °F
June 19	1933	102 °F
June 21	1988	105 °F
June 23	1937	100 °F
June 24	1988	105 °F
June 25	1988	103 °F
June 25	1936	106 °F
June 26	1933	106 °F
June 26	1931	101 °F
June 27	1933	102 °F
June 27	1931	103 °F
June 28	1988	100 °F
June 28	1933	100 °F
June 28	1931	107 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 10	1931	104 °F
September 9	1931	103 °F
September 7	1933	101 °F
September 6	1976	100 °F
September 6	1893	101 °F
September 4	1933	101 °F
September 3	2023	101 °F
September 3	1893	101 °F
August 27	1973	100 °F
August 26	1973	100 °F
August 24	1936	105 °F
August 24	1929	100 °F
August 18	1976	100 °F
August 16	1988	101 °F
August 15	1988	101 °F
August 15	1937	102 °F
August 15	1936	101 °F
August 14	1928	100 °F
August 13	1965	102 °F
August 11	1933	100 °F