Earliest and Latest Days of 100° F in Rio Grande City

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Rio Grande City, Texas history. It is based on NOAA data from the years 1892–2024.

Also see:

Earliest 100 degree day in Rio Grande City?

The earliest in the year that Rio Grande City, Texas had a high temperature of at least 100 °F is February 5 which happened in 2008.

Latest 100 degree day in Rio Grande City?

The latest in the year that Rio Grande City, Texas had a high temperature of at least 100 °F is October 31 which happened in 1979.

Earliest Days ≥ 100 °F

Date	Year	Temperature
February 5	2008	100 °F
February 10	1960	102 °F
February 19	1986	100 °F
February 20	1986	100 °F
February 21	1996	100 °F
February 24	2017	102 °F
February 25	2017	103 °F
February 26	1902	104 °F
February 27	2011	100 °F
March 2	2023	103 °F
March 2	1940	100 °F
March 3	2023	102 °F
March 6	1967	100 °F
March 6	1930	104 °F
March 7	1991	105 °F
March 7	1956	101 °F
March 7	1930	103 °F
March 9	1901	103 °F
March 11	2006	100 °F
March 11	1954	100 °F
March 11	1902	104 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
October 31	1979	100 °F
October 27	1959	100 °F
October 21	1984	100 °F
October 19	2012	104 °F
October 18	1980	101 °F
October 17	1962	100 °F
October 16	2021	101 °F
October 16	1962	100 °F
October 16	1957	100 °F
October 15	2021	100 °F
October 14	2000	100 °F
October 13	1969	103 °F
October 11	2021	102 °F
October 11	1962	101 °F
October 10	1962	101 °F
October 9	1977	100 °F
October 9	1962	101 °F
October 9	1959	101 °F
October 9	1956	100 °F
October 8	1962	100 °F