Earliest and Latest Days of 100° F in St. George

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

Also see:

Earliest 100 degree day in St. George?

The earliest in the year that St. George, Utah had a high temperature of at least 100 °F is April 25 which happened in 1946.

Latest 100 degree day in St. George?

The latest in the year that St. George, Utah had a high temperature of at least 100 °F is September 29 which has happened 3 times, most recently in 1969.

Earliest Days ≥ 100 °F

Date	Year	Temperature
April 25	1946	100 °F
May 3	1947	102 °F
May 4	1947	100 °F
May 10	1934	100 °F
May 11	2001	100 °F
May 11	1996	102 °F
May 11	1960	101 °F
May 11	1934	100 °F
May 12	1996	105 °F
May 12	1984	100 °F
May 13	1996	105 °F
May 13	1936	101 °F
May 14	1996	103 °F
May 14	1938	100 °F
May 14	1927	100 °F
May 14	1903	100 °F
May 15	1927	101 °F
May 16	2022	100 °F
May 16	1927	100 °F
May 17	1956	100 °F
May 17	1924	100 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 29	1969	100 °F
September 29	1963	100 °F
September 29	1942	100 °F
September 28	1942	100 °F
September 27	1994	100 °F
September 27	1969	100 °F
September 27	1942	102 °F
September 26	2015	100 °F
September 26	2003	100 °F
September 26	1969	100 °F
September 25	2015	101 °F
September 25	1947	103 °F
September 25	1899	101 °F
September 24	1936	100 °F
September 24	1928	100 °F
September 23	2001	100 °F
September 23	1966	101 °F
September 23	1924	100 °F
September 22	2000	103 °F
September 22	1966	102 °F
September 22	1949	100 °F
September 22	1899	102 °F