Earliest and Latest Days of 100° F in Walla Walla

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Walla Walla, Washington history. It is based on NOAA data from the years 1949–2024.

Also see:

Earliest 100 degree day in Walla Walla?

The earliest in the year that Walla Walla, Washington had a high temperature of at least 100 °F is May 28 which happened in 1983.

Latest 100 degree day in Walla Walla?

The latest in the year that Walla Walla, Washington had a high temperature of at least 100 °F is September 8 which happened in 1981.

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 28	1983	100 °F
June 3	2007	100 °F
June 6	2016	100 °F
June 8	2015	102 °F
June 14	1987	102 °F
June 15	1961	100 °F
June 16	1961	105 °F
June 17	1961	106 °F
June 18	1985	100 °F
June 19	1985	102 °F
June 21	1973	105 °F
June 21	1970	100 °F
June 22	1992	103 °F
June 22	1973	101 °F
June 22	1958	102 °F
June 23	1992	107 °F
June 23	1970	100 °F
June 24	1992	106 °F
June 25	2017	100 °F
June 25	1992	101 °F
June 25	1970	100 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 8	1981	102 °F
September 6	1955	102 °F
September 2	2022	103 °F
September 2	1950	104 °F
August 31	1987	103 °F
August 31	1976	100 °F
August 31	1967	103 °F
August 30	2007	101 °F
August 30	1967	104 °F
August 29	1967	102 °F
August 28	2023	103 °F
August 28	1972	104 °F
August 27	1986	107 °F
August 27	1974	100 °F
August 27	1972	100 °F
August 25	1958	103 °F
August 24	1958	101 °F
August 23	1988	100 °F
August 23	1981	100 °F
August 23	1970	102 °F
August 23	1969	100 °F