Boise ID Highest Temperature Each Year

Here's where you'll find answers to questions about the highest temperatures and hottest days in Boise, Idaho. How hot did it get in 2019? When was the last year thermometers in Boise never reached 100 °F? What was the highest temperature in Boise a century ago? Answers to those questions and much more can be found quickly and easily in the list below of record high temperatures.

This page gives the highest temperature for each year in Boise and the date that it happened. A date with a plus sign means it was that hot on at least one other day earlier that year.

These records go back to 1911, with a few years missing data. The highest temperature measured during that time was 111 degrees Fahrenheit (44 Celsius) on July 19, 1960 and July 20, 1931.

Since 1940 the temperature extremes were observed at Boise Airport. Before then, the weather station was on the outskirts of Boise.

Highest Boise temperatures in recent years
Max °F	Date	Max °C
105	August 16, 2023 +	41
106	August 31, 2022 +	41
107	July 06, 2021	42
105	July 30, 2020	41
102	July 22, 2019	39
110	August 10, 2018	43
104	July 08, 2017	40
102	June 29, 2016	39
110	June 28, 2015	43
104	July 13, 2014	40
110	July 01, 2013	43
108	July 12, 2012 +	42
103	July 24, 2011	39
104	August 26, 2010	40

Highest temperature recorded at Boise each year
Max °F	Date	Max °C
106	July 18, 2009	41
105	June 29, 2008	41
105	July 14, 2007 +	41
107	July 22, 2006	42
107	July 21, 2005	42
104	July 17, 2004	40
108	July 22, 2003	42
110	July 13, 2002	43
106	July 03, 2001	41
102	August 09, 2000 +	39
102	July 27, 1999	39
108	July 17, 1998	42
101	August 07, 1997 +	38
104	August 26, 1996 +	40
102	July 28, 1995	39
106	July 22, 1994	41
102	July 28, 1993	39
106	July 31, 1992	41
103	July 12, 1991	39
109	August 06, 1990	43
108	July 07, 1989	42
104	June 22, 1988	40
104	July 26, 1987	40
105	August 10, 1986	41
101	July 09, 1985 +	38
104	July 25, 1984	40
106	August 07, 1983	41
98	July 30, 1982	37
102	July 04, 1981	39
106	July 22, 1980	41
102	July 17, 1979	39
105	July 26, 1978	41
102	August 01, 1977	39
103	July 16, 1976	39
108	July 27, 1975	42
105	June 17, 1974 +	41
103	July 10, 1973 +	39
102	August 11, 1972	39
104	August 01, 1971	40
102	August 06, 1970 +	39
107	August 23, 1969	42
104	July 27, 1968	40
107	July 12, 1967	42
103	August 02, 1966	39
103	August 07, 1965	39
101	August 17, 1964 +	38
104	August 13, 1963	40
102	June 25, 1962	39
110	August 04, 1961	43
111	July 19, 1960	44
106	July 23, 1959	41
100	July 28, 1958	38
100	July 25, 1957	38
106	July 09, 1956	41
105	August 30, 1955	41
100	July 04, 1954	38
105	July 12, 1953	41
98	June 09, 1952	37
103	July 31, 1951 +	39
103	June 30, 1950	39
105	August 03, 1949	41
99	July 22, 1948	37
104	July 14, 1947	40
105	August 19, 1946	41
102	September 01, 1945 +	39
99	August 05, 1944	37
102	July 25, 1943	39
104	July 21, 1942 +	40
101	July 17, 1941	38
109	June 19, 1940	43
110	July 27, 1939	43
103	July 22, 1938	39
104	July 04, 1937	40
104	July 21, 1936 +	40
107	August 09, 1935	42
110	July 28, 1934 +	43
110	July 24, 1933	43
106	August 07, 1932	41
111	July 20, 1931	44
107	July 14, 1930	42
–	1929	–
108	July 25, 1928	42
102	July 26, 1927	39
108	August 24, 1926	42
108	July 16, 1925	42
–	1924	–
101	July 27, 1923	38
104	August 26, 1922	40
101	July 19, 1921	38
–	1920	–
107	July 16, 1919	42
104	July 29, 1918	40
105	July 26, 1917	41
101	July 12, 1916	38
–	1915	–
102	August 14, 1914	39
100	August 24, 1913	38
98	July 17, 1912 +	37
101	July 17, 1911 +	38

Boise - Highest Temperature for Each Year

Reference

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