Earliest and Latest Days of 100° F in Mammoth Spring

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Mammoth Spring, Arkansas history. It is based on NOAA data from the years 1904–2024.

Also see:

Earliest 100 degree day in Mammoth Spring?

The earliest in the year that Mammoth Spring, Arkansas had a high temperature of at least 100 °F is June 9 which happened in 1972.

Latest 100 degree day in Mammoth Spring?

The latest in the year that Mammoth Spring, Arkansas had a high temperature of at least 100 °F is September 29 which happened in 1953.

Earliest Days ≥ 100 °F

Date	Year	Temperature
June 9	1972	100 °F
June 11	1953	102 °F
June 13	1953	102 °F
June 15	1952	100 °F
June 17	1936	100 °F
June 17	1913	100 °F
June 17	1911	105 °F
June 18	1953	101 °F
June 18	1936	102 °F
June 18	1913	101 °F
June 19	1953	102 °F
June 19	1952	100 °F
June 19	1936	103 °F
June 19	1913	101 °F
June 20	1953	103 °F
June 20	1936	106 °F
June 20	1913	100 °F
June 21	1953	101 °F
June 21	1936	100 °F
June 21	1933	100 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 29	1953	101 °F
September 20	1955	100 °F
September 20	1954	100 °F
September 16	1956	102 °F
September 16	1954	102 °F
September 15	1956	101 °F
September 15	1954	101 °F
September 15	1939	100 °F
September 14	1971	100 °F
September 14	1956	102 °F
September 14	1954	102 °F
September 14	1939	102 °F
September 13	1972	100 °F
September 13	1956	100 °F
September 13	1939	101 °F
September 13	1936	100 °F
September 12	1939	100 °F
September 11	1912	101 °F
September 10	1925	106 °F
September 9	1939	101 °F
September 9	1925	104 °F
September 9	1912	100 °F