Number of Days of 100 °F in Boise by Year

This page contains a list of the number of days in each year that the high temperature equaled or exceeded 100 degrees Fahrenheit in Boise, Idaho, between 1911 and 2024.

Also see:

Which year had the most 100° days?

Based on NOAA records, the year 2022 holds the record for the most 100 °F days in Boise history. There were 27 days with a high temperature of at least 100 degrees that year.

How many so far this year (2024)?

It has not reached 100 degrees Fahrenheit in Boise so far in 2024. As of April 24, the highest temperature this year is 81 °F.

The last time it reached at least 100° F was August 17, 2023.

Years marked with a gold background have more than 5% incomplete data
Click column headers to sort

Year	Rank	Days >= 100 °F
2024	108	0
2023	18	11
2022	1	27
2021	4	18
2020	22	10
2019	76	3
2018	10	14
2017	18	11
2016	29	9
2015	10	14
2014	37	8
2013	10	14
2012	16	12
2011	56	5
2010	47	6
2009	37	8
2008	37	8
2007	7	16
2006	7	16
2005	16	12
2004	47	6
2003	3	20
2002	43	7
2001	29	9
2000	22	10
1999	66	4
1998	22	10
1997	66	4
1996	43	7
1995	95	1
1994	10	14
1993	95	1
1992	29	9
1991	56	5
1990	9	15
1989	56	5
1988	29	9
1987	56	5
1986	76	3
1985	47	6
1984	66	4
1983	88	2
1982	108	0
1981	88	2
1980	95	1
1979	66	4
1978	66	4
1977	66	4
1976	66	4
1975	22	10
1974	47	6
1973	66	4
1972	76	3
1971	22	10
1970	22	10
1969	76	3
1968	37	8
1967	47	6
1966	88	2
1965	76	3
1964	76	3
1963	76	3
1962	95	1
1961	29	9
1960	18	11
1959	56	5
1958	95	1
1957	95	1
1956	76	3
1955	47	6
1954	95	1
1953	56	5
1952	108	0
1951	56	5
1950	66	4
1949	76	3
1948	108	0
1947	76	3
1946	56	5
1945	88	2
1944	108	0
1943	95	1
1942	47	6
1941	95	1
1940	56	5
1939	22	10
1938	88	2
1937	88	2
1936	37	8
1935	56	5
1934	29	9
1933	95	1
1932	95	1
1931	2	26
1930	5	17
1929	29	9
1928	10	14
1927	108	0
1926	5	17
1925	10	14
1924	18	11
1923	76	3
1922	47	6
1921	66	4
1920	47	6
1919	29	9
1918	43	7
1917	37	8
1916	95	1
1915	88	2
1914	43	7
1913	95	1
1912	108	0
1911	76	3

Weather Station Details

Years	Station	Coordinates
1940–2024		location
1911–1939	Meridian 1 W	location