Earliest and Latest Days of 100° F in Mountain Home

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Mountain Home, Arkansas history. It is based on NOAA data from the years 1902–2024.

Also see:

Earliest 100 degree day in Mountain Home?

The earliest in the year that Mountain Home, Arkansas had a high temperature of at least 100 °F is May 29 which happened in 1926.

Latest 100 degree day in Mountain Home?

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

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 29	1926	100 °F
May 30	1934	100 °F
May 31	1934	101 °F
June 1	1934	102 °F
June 9	1936	102 °F
June 11	1953	101 °F
June 12	1953	100 °F
June 13	1953	103 °F
June 14	1952	100 °F
June 15	1953	100 °F
June 15	1936	100 °F
June 16	1953	102 °F
June 16	1936	101 °F
June 17	1936	104 °F
June 18	1953	101 °F
June 18	1936	105 °F
June 19	1953	104 °F
June 19	1952	101 °F
June 19	1936	110 °F
June 20	1953	105 °F
June 20	1936	109 °F
June 20	1933	100 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 29	1953	103 °F
September 28	1953	101 °F
September 25	1939	100 °F
September 20	1954	100 °F
September 19	1954	102 °F
September 18	1931	101 °F
September 17	1931	102 °F
September 16	1931	100 °F
September 15	1971	100 °F
September 15	1954	100 °F
September 15	1939	103 °F
September 15	1931	100 °F
September 14	1954	101 °F
September 14	1939	104 °F
September 14	1936	100 °F
September 13	1939	105 °F
September 13	1936	101 °F
September 12	1939	102 °F
September 12	1936	102 °F
September 11	1939	100 °F
September 11	1936	104 °F