Earliest and Latest Days of 100° F in Riverton

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Riverton, Wyoming history. It is based on NOAA data from the years 1907–2024.

Also see:

Earliest 100 degree day in Riverton?

The earliest in the year that Riverton, Wyoming had a high temperature of at least 100 °F is June 15 which happened in 2021.

Latest 100 degree day in Riverton?

The latest in the year that Riverton, Wyoming had a high temperature of at least 100 °F is August 25 which happened in 1919.

Earliest Days ≥ 100 °F

Date	Year	Temperature
June 15	2021	100 °F
June 16	2021	101 °F
June 17	2021	100 °F
June 23	1988	100 °F
June 24	1990	100 °F
June 24	1988	101 °F
June 24	1954	100 °F
June 25	2012	101 °F
June 25	1990	101 °F
June 25	1988	100 °F
June 28	1970	102 °F
June 30	1990	100 °F
July 1	1990	104 °F
July 2	2012	101 °F
July 2	2001	100 °F
July 2	1990	103 °F
July 3	2007	101 °F
July 3	1990	101 °F
July 5	1989	102 °F
July 5	1988	101 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
August 25	1919	101 °F
August 19	1986	101 °F
August 13	2003	100 °F
August 11	1969	101 °F
August 8	1949	100 °F
August 7	2001	100 °F
August 7	1979	101 °F
August 7	1949	101 °F
August 6	1979	102 °F
August 6	1961	100 °F
August 1	2000	100 °F
August 1	1988	103 °F
July 30	2006	102 °F
July 28	2021	102 °F
July 28	1978	101 °F
July 28	1960	100 °F
July 27	1931	101 °F
July 25	2003	102 °F
July 25	1988	100 °F
July 25	1959	102 °F
July 25	1956	100 °F