Earliest and Latest Days of 100° F in Webster City

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

Also see:

Earliest 100 degree day in Webster City?

The earliest in the year that Webster City, Iowa had a high temperature of at least 100 °F is May 22 which happened in 1925.

Latest 100 degree day in Webster City?

The latest in the year that Webster City, Iowa had a high temperature of at least 100 °F is September 15 which happened in 1939.

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 22	1925	102 °F
May 24	1939	101 °F
May 29	1934	104 °F
May 30	1934	107 °F
May 31	1934	107 °F
June 1	1934	102 °F
June 2	1934	103 °F
June 5	1933	100 °F
June 6	1933	101 °F
June 8	1985	103 °F
June 9	1911	100 °F
June 10	1933	101 °F
June 13	1987	100 °F
June 14	1987	100 °F
June 17	1946	100 °F
June 17	1913	100 °F
June 19	1910	101 °F
June 20	1933	101 °F
June 23	1934	104 °F
June 24	1988	100 °F
June 24	1910	100 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 15	1939	100 °F
September 14	1939	101 °F
September 13	1939	100 °F
September 10	1931	100 °F
September 8	1947	100 °F
September 7	1939	102 °F
September 7	1931	100 °F
September 6	1939	103 °F
September 5	1913	103 °F
September 4	1925	100 °F
September 3	1939	101 °F
August 27	1984	100 °F
August 27	1955	101 °F
August 25	1936	100 °F
August 24	1948	100 °F
August 24	1936	104 °F
August 23	1948	102 °F
August 22	1947	100 °F
August 21	1955	100 °F
August 21	1947	101 °F