Boise, ID: Summer

31 August 2026: Summer 2026 averaged 76.1°F in Boise, ID, the warmest summer since 2024, tied 8th warmest of 149 (with 2023).

Summer 2026

Mean temperature: 76.1°F; Warmest since 2024; 8th warmest of 149
Precipitation: 0.87 in; Driest since 2024; 56th driest of 149

A normal summer in Boise, ID (1991 to 2020): a mean temperature of 73.6°F, between 71.7°F and 76.3°F in eight years of ten and 0.96 in of precipitation, between 0.32 in and 2.18 in in eight years of ten.

The mean temperature of every summer in Boise, ID since 1878: 76.1°F in 2026; the highest is 78.1°F, in 2021.

Normal range, 71.7 to 76.3°F

Every year, ranked, as a table

Every summer in Boise, ID from 1875 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	76.1	8	90.7	12	61.5	7	0.87	94	0
2025	75.1	14	89.6	18	60.7	12	0.98	87	0
2024	77.5	2	92.2	2	62.7	2	0.64	103	0
2023	76.1	8	90.2	15	62	4	3.76	5	0
2022	76.8	3	91.7	4	61.8	5	1.12	73	0
2021	78.1	1	92.7	1	63.4	1	1.79	41	0
2020	73.1	34	87.2	57	58.9	24	3.42	9	0
2019	73.7	22	88.2	42	59.2	21	0.15	142	0
2018	74.9	15	89.8	17	60.1	16	0.36	126	0
2017	76.3	7	90.8	11	61.7	6	1.63	46	0
2016	74.2	18	89.1	24	59.2	21	0.45	120	0
2015	76.6	4	90.9	10	62.4	3	1.32	58	0
2014	74.8	16	88.6	32	60.9	10	0.51	114	0
2013	76.6	4	92	3	61.2	8	0.99	86	0
2012	75.8	11	91.1	9	60.5	14	0.26	137	0
2011	72.8	38	87.2	57	58.4	29	0.48	118	0
2010	72	52	86	84	58	37	1.19	65	0
2009	73.9	21	87	63	60.8	11	3.45	8	0
2008	73.6	25	88.4	34	58.9	24	0.79	99	0
2007	76.4	6	91.7	4	61.2	8	1.01	84	0
2006	75.5	13	90.4	14	60.7	12	1.04	79	0
2005	73.2	32	87.8	45	58.6	27	0.93	89	0
2004	74.1	20	88.2	42	60	17	1.16	68	0
2003	75.9	10	91.3	8	60.5	14	0.78	100	0
2002	73.4	30	87.6	51	59.3	20	0.33	130	0
2001	73.5	28	88.8	29	58.3	33	0.47	119	0
2000	73.6	25	89.3	21	57.8	38	0.27	136	0
1999	71.8	58	86.5	71	57	51	0.76	101	0
1998	73.2	32	87.8	45	58.6	27	1.70	44	0
1997	71.5	68	85.5	96	57.5	40	2.07	33	0
1996	72.8	38	88.1	44	57.4	42	0.33	130	0
1995	69.5	121	85.2	104	53.8	127	1.53	49	0
1994	73.7	22	90.5	13	56.8	54	0.34	128	0
1993	65.2	149	79.5	152	50.9	146	2.86	16	0
1992	71.7	63	87.6	51	55.8	81	2.10	29	0
1991	71.7	63	88.3	38	55.2	99	1.05	78	0
1990	72.4	42	88.3	38	56.5	62	0.92	91	0
1989	71.8	58	87.8	45	55.8	81	0.89	93	0
1988	72.3	44	89.6	18	55	103	0.58	111	0
1987	70.5	89	86.3	75	54.6	112	1.39	55	0
1986	72.5	41	88.8	29	56.3	65	0.59	109	0
1985	71.4	69	87.4	54	55.4	90	1.26	60	0
1984	70.5	89	84.9	111	56.1	73	2.94	12	0
1983	69.4	125	84.5	124	54.3	117	1.61	47	0
1982	69.6	119	84.8	115	54.4	116	2.16	28	0
1981	69.5	121	86.4	72	52.6	143	1.13	72	0
1980	67.6	146	83.4	138	51.8	144	0.61	107	0
1979	70.7	84	86.1	81	55.3	95	2.00	36	0
1978	69.1	127	84.9	111	53.3	132	1.28	59	0
1977	72.2	46	87	63	57.4	42	2.40	22	0
1976	67.9	143	83	143	52.7	141	3.76	5	0
1975	71	78	85.7	93	56.2	68	2.08	32	0
1974	72.4	42	88.4	34	56.4	63	1.35	56	0
1973	72.1	50	87.4	54	56.7	60	0.29	133	0
1972	71.9	57	87.1	61	56.7	60	1.16	68	0
1971	72.8	38	87.2	57	58.4	29	1.88	40	0
1970	73.7	22	88.9	27	58.4	29	2.10	29	0
1969	70.6	86	85.8	91	55.4	90	2.02	35	0
1968	71.3	73	85.6	95	57	51	2.97	11	0
1967	74.3	17	89.5	20	59	23	1.12	73	0
1966	70.1	106	86.2	79	54	123	0.08	147	0
1965	69.7	116	84.2	128	55.3	95	2.33	25	0
1964	68.9	130	83.3	139	54.5	113	2.94	12	0
1963	69.9	108	84.7	120	55.1	100	2.54	19	0
1962	69.5	121	84.8	115	54.2	120	0.28	135	0
1961	75.7	12	91.7	4	59.6	19	1.01	84	0
1960	72.9	36	88.9	27	56.9	53	1.79	41	0
1959	71.6	65	86.9	65	56.2	68	0.91	92	0
1958	72	52	85.8	91	58.2	35	3.95	4	0
1957	70	107	85.3	101	54.7	110	0.25	138	0
1956	69.8	112	84.8	115	54.9	105	1.03	80	0
1955	70.9	80	86.3	75	55.4	90	1.02	82	0
1954	68.4	134	83	143	53.8	127	1.40	53	0
1953	68.4	134	83.5	137	53.3	132	1.34	57	0
1952	70.2	100	84.9	111	55.6	86	1.25	61	0
1951	70.2	100	85	108	55.3	95	1.06	76	0
1950	69.9	108	84.8	115	55	103	1.48	50	0
1949	71.3	73	86.8	68	55.8	81	0.49	117	0
1948	69.1	127	84.2	128	54.1	122	1.70	44	0
1947	69.8	112	84.6	122	54.9	105	0.85	96	0
1946	71.2	77	86.9	65	55.5	88	0.43	122	0
1945	69.9	108	85.1	106	54.7	110	0.93	89	0
1944	68	141	82.2	149	53.8	127	2.10	29	0
1943	68.7	132	83.7	133	53.7	130	1.25	61	0
1942	69.9	108	85	108	54.8	107	0.64	103	0
1941	69.8	112	83.6	136	56.1	73	4.13	2	0
1940	72.9	36	89	25	56.8	54	0.45	120	0
1939	71.3	73	86.3	75	56.3	65	0.53	113	0
1938	71.3	73	85.3	101	57.4	42	2.17	27	0
1937	71.4	69	86.1	81	56.8	54	0.51	114	0
1936	74.2	18	88.6	32	59.8	18	2.38	23	0
1935	70.9	80	86	84	55.8	81	0.09	146	0
1934	72.3	44	87.3	56	57.3	45	1.73	43	0
1933	73.1	34	88.4	34	57.7	39	0.15	142	0
1932	70.3	96	84.8	115	55.9	80	1.46	51	0
1931	73.6	25	89	25	58.3	33	0.17	141	0
1930	71.8	58	86.4	72	57.2	48	0.98	87	0
1929	72.2	46	87.1	61	57.2	48	1.19	65	0
1928	70.2	100	85	108	55.5	88	0.59	109	0
1927	70.9	80	85.5	96	56.3	65	1.15	70	0
1926	73.4	30	88.3	38	58.4	29	1.14	71	0
1925	71.8	58	86.2	79	57.3	45	2.49	21	0
1924	70.4	93	86.1	81	54.8	107	0.63	105	0
1923	70.5	89	84.5	124	56.4	63	2.93	15	0
1922	73.5	28	88.3	38	58.7	26	1.89	39	0
1921	72.2	46	87.2	57	57.2	48	0.43	122	0
1920	70.9	80	86	84	55.8	81	1.56	48	0
1919	72.2	46	88.4	34	56	77	trace	149	0
1918	71.6	65	85.9	87	57.3	45	1.17	67	0
1917	71.4	69	86.9	65	56	77	0.34	128	0
1916	67.7	145	82.5	147	52.9	137	2.94	12	0
1915	70.2	100	84.5	124	56	77	1.11	75	0
1914	70.4	93	84.6	122	56.2	68	1.90	38	0
1913	69.5	121	82.3	148	56.8	54	3.68	7	0
1912	67.9	143	81.2	150	54.5	113	2.20	26	0
1911	69.6	119	83.7	133	55.6	86	2.60	18	0
1910	70.2	100	85.9	87	54.5	113	0.30	132	0
1909	70.3	96	85.1	106	55.4	90	0.82	97	0
1908	68.9	130	82.7	146	55.1	100	3.34	10	0
1907	67.1	147	80.3	151	53.9	125	2.67	17	0
1906	70.5	89	84.3	127	56.8	54	1.03	80	0
1905	70.4	93	84.7	120	56.1	73	1.06	76	0
1904	70.7	84	85.9	87	55.4	90	1.25	61	0
1903	71	78	85.9	87	56.1	73	0.63	105	0
1902	68.1	140	83.2	141	52.9	137	2.03	34	0
1901	70.6	86	86.4	72	54.8	107	0.02	148	0
1900	69.7	116	85.2	104	54.3	117	0.37	125	0
1899	68.2	139	83.3	139	53.1	135	1.02	82	0
1898	71.6	65	89.3	21	53.9	125	0.35	127	0
1897	70.2	100	87.6	51	52.8	140	0.56	112	0
1896	72	52	87.8	45	56.2	68	2.52	20	0
1895	67	148	84	132	49.9	149	0.50	116	0
1894	69.8	112	85.4	98	54.3	117	0.25	138	0
1893	68.4	134	85.3	101	51.5	145	0.10	145	0
1892	68.4	134	86.3	75	50.5	148	1.22	64	0
1891	69	129	85.4	98	52.7	141	2.34	24	0
1890	69.2	126	85.4	98	52.9	137	0.80	98	0
1889	72	52	90	16	54	123	0.60	108	0
1888	70.3	96	86.8	68	53.7	130	4.30	1	0
1887	68.3	138	85.7	93	50.9	146	1.99	37	0
1886	71.4	69	87.7	50	55.1	100	0.68	102	0
1885	70.3	96	83.7	133	56.8	54	1.40	53	0
1884	70.6	86	83.1	142	58.2	35	4.08	3	0
1883	71.8	58	89.3	21	54.2	120	0.20	140	7
1882	72	52	87.8	45	56.2	68	0.29	133	0
1881	68.6	133	84.1	130	53.2	134	0.42	124	0
1880	68	141	82.8	145	53.1	135	0.15	142	0
1879	69.7	116	84.1	130	55.3	95	1.46	51	0
1878	72.1	50	86.6	70	57.5	40	0.86	95	2
1877			84.9	111					30
1876			88.8	29					92
1875			91.4	7					92

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2021	78.1
2024	77.5
2022	76.8
2015	76.6
2013	76.6
2007	76.4
2017	76.3
2026	76.1
2023	76.1
2003	75.9

Coldest
Year	Mean, °F
1993	65.2
1895	67
1907	67.1
1980	67.6
1916	67.7
1976	67.9
1912	67.9
1944	68
1880	68
1902	68.1

Wettest
Year	Precipitation, in
1888	4.30
1941	4.13
1884	4.08
1958	3.95
2023	3.76
1976	3.76
1913	3.68
2009	3.45
2020	3.42
1908	3.34

Driest
Year	Precipitation, in
1919	trace
1901	0.02
1966	0.08
1935	0.09
1893	0.10
2019	0.15
1933	0.15
1880	0.15
1931	0.17
1883	0.20

The hottest, coldest and wettest days

Hottest day: 104°F; 20 July 2026, 11 July 2026
Coldest night: 44°F; 11 June 2026
Wettest day: 0.30 in; 26 June 2026

Every month, season and year

Months

Seasons

Years

Boise, ID the day's answers

All-time records

Every answer in words

Summer 2026 brought 0.87 in of precipitation in Boise, ID, the driest summer since 2024, 56th driest of 149.
The hottest day of summer 2026 in Boise, ID: 104°F on Monday 20 July 2026 and Saturday 11 July 2026.
The coldest night of summer 2026 in Boise, ID: a low of 44°F on Thursday 11 June 2026.
The wettest day of summer 2026 in Boise, ID: 0.30 in on Friday 26 June 2026.