Boise, ID: August

31 August 2026: August 2026 averaged 78.8°F in Boise, ID, the warmest August since 2022, 2nd warmest of 150.

August 2026

Mean temperature: 78.8°F; Warmest since 2022; 2nd warmest of 150
Precipitation: a trace; Driest since 2016; 9th driest of 149

A normal August in Boise, ID (1991 to 2020): a mean temperature of 75.9°F, between 73.6°F and 78.2°F in eight years of ten and 0.06 in of precipitation, between 0.00 in and 0.34 in in eight years of ten.

The mean temperature of every August in Boise, ID since 1877: 78.8°F in 2026; the highest is 81.9°F, in 2022.

Normal range, 73.6 to 78.2°F

Every year, ranked, as a table

Every August 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	78.8	2	93.3	10	64.3	3	trace	113	0
2025	76.7	19	90.5	44	62.8	13	0.51	22	0
2024	77.5	13	91.5	30	63.5	4	0.02	102	0
2023	77.9	11	91.4	31	64.4	2	2.79	1	0
2022	81.9	1	96.8	1	67.1	1	0.09	76	0
2021	74.4	55	88.5	79	60.4	33	0.19	56	0
2020	77.3	15	92	22	62.6	16	0.07	82	0
2019	76.9	18	91.9	23	61.9	18	0.09	76	0
2018	76.3	24	91.1	32	61.5	21	0.01	108	0
2017	78	9	92.6	17	63.3	5	0.22	50	0
2016	75.1	37	90	52	60.3	34	trace	113	0
2015	77.4	14	91.6	28	63.2	7	0.18	58	0
2014	75.7	30	88.6	77	62.9	11	0.16	60	0
2013	78.2	7	93.7	8	62.7	14	0.45	25	0
2012	78.5	5	94	4	63	9	trace	113	0
2011	78.4	6	93.5	9	63.3	5	trace	113	0
2010	73.9	62	88.2	91	59.6	43	0.27	40	0
2009	75.1	37	88.4	83	61.9	18	1.79	4	0
2008	75.9	26	90.6	43	61.2	25	trace	113	0
2007	75.5	32	91.1	32	59.9	40	0.04	94	0
2006	74	58	89.2	67	58.8	54	0.02	102	0
2005	76.7	19	91.6	28	61.8	20	trace	113	0
2004	74.9	43	88.5	79	61.2	25	0.38	30	0
2003	77.3	15	91.7	25	63	9	0.33	34	0
2002	70.9	111	85.1	128	56.7	90	0.05	89	0
2001	78.7	3	94.7	2	62.7	14	trace	113	0
2000	75.9	26	91.7	25	60.1	36	0.10	73	0
1999	75.1	37	89.6	58	60.6	30	0.29	36	0
1998	76.7	19	92.5	19	60.9	28	0.00	142	0
1997	75.5	32	90.4	46	60.7	29	0.27	40	0
1996	74.7	47	89.7	56	59.8	41	trace	113	0
1995	71.2	106	88.4	83	54	126	0.06	87	0
1994	76.1	25	93.2	11	59	49	trace	113	0
1993	68.6	140	83.8	142	53.3	138	0.24	44	0
1992	73.9	62	90.8	38	57	85	trace	113	0
1991	76.6	22	93	14	60.1	36	0.04	94	0
1990	74	58	89.2	67	58.7	55	0.39	29	0
1989	70	125	84.9	133	55	116	0.78	11	0
1988	71.5	103	89.2	67	53.9	128	0.09	76	0
1987	70	125	87.1	106	52.9	141	0.11	71	0
1986	75.9	26	92.6	17	59.2	47	0.07	82	0
1985	69.2	133	85.1	128	53.3	138	0.04	94	0
1984	75.5	32	90.3	47	60.6	30	1.24	5	0
1983	74.9	43	90.1	50	59.7	42	0.28	38	0
1982	72.6	87	89.3	65	56	99	0.19	56	0
1981	74.1	57	92.3	20	56	99	0.13	63	0
1980	67.2	148	83.7	144	50.7	149	trace	113	0
1979	71.1	108	85.7	123	56.6	91	1.81	3	0
1978	69.9	129	86.4	116	53.4	137	0.24	44	0
1977	73.5	68	87.6	97	59.5	45	0.73	14	0
1976	67.7	146	81.6	148	53.8	131	0.95	8	0
1975	70	125	84.3	140	55.7	107	0.48	23	0
1974	71.7	98	87.6	97	55.8	103	0.22	50	0
1973	73	77	88.4	83	57.5	74	0.03	98	0
1972	74.5	51	90.1	50	58.9	53	0.05	89	0
1971	78.6	4	94	4	63.1	8	0.18	58	0
1970	75.7	30	93.1	13	58.4	61	0.10	73	0
1969	72.4	89	89.5	62	55.3	111	trace	113	0
1968	68.7	138	80.8	151	56.6	91	2.37	2	0
1967	78	9	94.5	3	61.5	21	trace	113	0
1966	72	96	88.3	87	55.8	103	0.01	108	0
1965	71.1	108	84.9	133	57.3	79	0.88	9	0
1964	69.2	133	84.5	137	53.9	128	0.53	19	0
1963	73.4	69	89.1	71	57.8	67	0.64	15	0
1962	70.7	115	85.9	120	55.5	110	0.12	66	0
1961	77.8	12	92.7	16	62.9	11	0.21	52	0
1960	69	136	84.1	141	53.8	131	0.83	10	0
1959	70	125	84.9	133	55.1	114	0.64	15	0
1958	75.9	26	90.5	44	61.2	25	0.53	19	0
1957	70.7	115	86.7	113	54.7	117	trace	113	0
1956	69.7	130	84.8	136	54.6	119	0.08	80	0
1955	74.6	49	91.7	25	57.5	74	trace	113	0
1954	68.2	143	82.9	145	53.5	136	0.24	44	0
1953	71.5	103	86.8	110	56.2	96	0.12	66	0
1952	72.9	79	88.5	79	57.2	82	trace	113	0
1951	72.2	93	86.8	110	57.6	70	0.07	82	0
1950	72.6	87	88.3	87	57	85	0.52	21	0
1949	73.6	66	89.1	71	58.2	63	0.12	66	0
1948	70.4	122	86.2	117	54.5	121	0.05	89	0
1947	72.2	93	87.8	94	56.6	91	0.05	89	0
1946	73.3	71	89.4	63	57.1	83	0.26	42	0
1945	73.4	69	89.3	65	57.5	74	0.08	80	0
1944	70.7	115	86.9	109	54.5	121	trace	113	0
1943	70.9	111	87.2	104	54.6	119	trace	113	0
1942	72.9	79	89	73	56.8	88	0.02	102	0
1941	70.9	111	84.5	137	57.3	79	0.61	17	0
1940	74.2	56	90.9	36	57.5	74	0.01	108	0
1939	74.7	47	90.8	38	58.6	57	trace	113	0
1938	71.7	98	86.6	115	56.9	87	0.03	98	0
1937	71.1	108	87.2	104	55.1	114	0.00	142	0
1936	75	41	89.9	53	60.1	36	0.38	30	0
1935	72.2	93	88	92	56.3	95	trace	113	0
1934	74.9	43	90.8	38	59	49	0.10	73	0
1933	72.9	79	87.5	99	58.4	61	0.01	108	0
1932	70.8	114	85.8	122	55.7	107	trace	113	0
1931	75.1	37	91	35	59.2	47	0.05	89	0
1930	74.8	46	88.3	87	61.3	23	0.78	11	0
1929	77.3	15	93.2	11	61.3	23	0.11	71	0
1928	71.2	106	86.7	113	55.8	103	0.02	102	0
1927	71.6	102	85.6	124	57.6	70	0.35	32	0
1926	73	77	87.4	102	58.6	57	0.77	13	0
1925	70.7	115	85.4	126	56.1	98	0.28	38	0
1924	70.5	119	86.8	110	54.1	125	0.12	66	0
1923	73.1	75	88.3	87	57.9	66	0.20	54	0
1922	74.5	51	88.6	77	60.3	34	1.13	6	0
1921	74	58	89.4	63	58.7	55	0.34	33	0
1920	72.3	90	87.9	93	56.6	91	0.33	34	0
1919	74.5	51	90.3	47	58.6	57	trace	113	0
1918	67.3	147	80.9	150	53.7	135	0.48	23	0
1917	74	58	89.8	54	58.2	63	trace	113	0
1916	70.3	123	85.5	125	55.2	113	0.45	25	0
1915	78.2	7	93.9	6	62.5	17	trace	113	0
1914	72.8	83	88.5	79	57.1	83	0.04	94	0
1913	73.2	72	87.4	102	59	49	0.03	98	0
1912	68.1	144	81.9	147	54.4	123	0.07	82	0
1911	69.5	131	85.2	127	53.8	131	trace	113	0
1910	68.9	137	85.1	128	52.6	143	0.00	142	0
1909	72.8	83	88.8	75	56.8	88	0.01	108	0
1908	70.5	119	85	132	56	99	0.21	52	0
1907	68.1	144	82.3	146	54	126	0.14	62	0
1906	72.9	79	87.8	94	58.1	65	0.13	63	0
1905	74.5	51	89.6	58	59.5	45	trace	113	0
1904	75	41	91.1	32	59	49	0.23	49	0
1903	72.3	90	88.4	83	56.2	96	0.13	63	0
1902	70.2	124	86	118	54.3	124	0.20	54	0
1901	76.4	23	92.3	20	60.5	32	0.02	102	0
1900	67	149	81.5	149	52.4	144	0.15	61	0
1899	66.3	150	80.8	151	51.9	146	0.44	27	0
1898	75.2	36	91.9	23	58.5	60	0.25	43	0
1897	75.3	35	93	14	57.6	70	trace	113	0
1896	71.8	97	87.8	94	55.8	103	1.06	7	0
1895	68.7	138	86	118	51.4	147	0.12	66	0
1894	73.8	64	89.8	54	57.8	67	0.06	87	0
1893	71.4	105	89.6	58	53.3	138	0.00	142	0
1892	69.4	132	89.2	67	49.7	150	0.00	142	0
1891	73.2	72	90.9	36	55.6	109	0.00	142	0
1890	70.5	119	87.1	106	53.9	128	0.24	44	0
1889	72.3	90	90.8	38	53.8	131	0.41	28	0
1888	72.8	83	90.8	38	54.7	117	0.58	18	0
1887	69.1	135	87.1	106	51.1	148	0.29	36	0
1886	72.7	86	90.2	49	55.3	111	trace	113	0
1885	71.7	98	85.9	120	57.6	70	0.09	76	0
1884	73.8	64	87.5	99	60.1	36	0.07	82	0
1883	73.6	66	89.7	56	57.4	78	trace	113	0
1882	73.1	75	88.9	74	57.3	79	0.00	142	0
1881	68.4	141	84.4	139	52.4	144	0.00	142	0
1880	68.3	142	83.8	142	52.7	142	0.02	102	0
1879	73.2	72	88.8	75	57.7	69	0.03	98	0
1878	74.6	49	89.6	58	59.6	43	0.24	44	2
1877	71.7	98	87.5	99	56	99			0
1876			85.1	128					31
1875			93.8	7					31

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2022	81.9
2026	78.8
2001	78.7
1971	78.6
2012	78.5
2011	78.4
2013	78.2
1915	78.2
2017	78
1967	78

Coldest
Year	Mean, °F
1899	66.3
1900	67
1980	67.2
1918	67.3
1976	67.7
1912	68.1
1907	68.1
1954	68.2
1880	68.3
1881	68.4

Wettest
Year	Precipitation, in
2023	2.79
1968	2.37
1979	1.81
2009	1.79
1984	1.24
1922	1.13
1896	1.06
1976	0.95
1965	0.88
1960	0.83

Driest
Year	Precipitation, in
1998	0.00
1937	0.00
1910	0.00
1893	0.00
1892	0.00
1891	0.00
1882	0.00
1881	0.00
2026	trace
2016	trace
More years share the last value

The hottest, coldest and wettest days

Hottest day: 101°F; 21 August 2026, 1 August 2026
Coldest night: 50°F; 30 August 2026

Every month, season and year

Months

Seasons

Years

Boise, ID the day's answers

All-time records

Every answer in words

August 2026 brought a trace of precipitation in Boise, ID, the driest August since 2016, tied 9th driest of 149 (with 2016, 2012, 2011 and 25 other years).
The hottest day of August 2026 in Boise, ID: 101°F on Friday 21 August 2026 and Saturday 1 August 2026.
The coldest night of August 2026 in Boise, ID: a low of 50°F on Sunday 30 August 2026.