Earliest and Latest Days of 100° F in Lewiston

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Lewiston, Idaho history. It is based on NOAA data from the years 1894–2024.

Also see:

Earliest 100 degree day in Lewiston?

The earliest in the year that Lewiston, Idaho had a high temperature of at least 100 °F is May 16 which happened in 1939.

Latest 100 degree day in Lewiston?

The latest in the year that Lewiston, Idaho had a high temperature of at least 100 °F is September 24 which happened in 2011.

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 16	1939	100 °F
May 27	1936	103 °F
May 28	1934	104 °F
May 29	1983	100 °F
May 29	1897	100 °F
June 2	2021	101 °F
June 3	2007	101 °F
June 3	1937	100 °F
June 6	2016	100 °F
June 8	2015	100 °F
June 11	1934	101 °F
June 12	1940	100 °F
June 13	1940	107 °F
June 14	1974	100 °F
June 16	1961	100 °F
June 17	1961	102 °F
June 19	1940	107 °F
June 20	1940	107 °F
June 21	2005	100 °F
June 21	1973	103 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 24	2011	100 °F
September 21	1967	101 °F
September 21	1939	102 °F
September 19	1938	101 °F
September 18	1938	101 °F
September 16	1937	101 °F
September 15	1937	100 °F
September 12	1944	103 °F
September 12	1937	101 °F
September 11	1944	102 °F
September 10	1944	103 °F
September 10	1940	100 °F
September 10	1935	101 °F
September 9	1944	102 °F
September 8	1944	106 °F
September 7	1944	108 °F
September 6	2003	100 °F
September 6	1944	103 °F
September 5	1973	101 °F
September 5	1942	101 °F