Challis, ID: September

30 September 2026: September 2026 averaged 57.8°F in Challis, ID, the warmest September since 2025, tied 43rd warmest of 103 (with 1954).

September 2026

Mean temperature: 57.8°F; Warmest since 2025; 43rd warmest of 103
Precipitation: 0.85 in; Wettest since 2025; 32nd wettest of 109

A normal September in Challis, ID (1991 to 2020): 0.38 in of precipitation, between 0.09 in and 1.17 in in eight years of ten.

The mean temperature of every September in Challis, ID since 1899: 57.8°F in 2026; the highest is 63.1°F, in 1990.

Every year, ranked, as a table

Every September in Challis, ID from 1899 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	57.8	43	73.6	61	42.1	26	0.85	32	0
2025	60.2	18	76.7	32	43.6	13	1.24	20	0
2024	61.6	10	79.2	12	44.1	10	0.36	60	0
2023	58.8	34	74.6	53	42.9	17	1.06	28	0
2022	61.9	5	80.1	8	43.7	12	0.30	67	0
2021	59.9	21	79.1	13	40.7	47	0.07	91	0
2020	60.7	12	80.2	7	41.1	36	0.04	99	0
2019	57.6	45	72.5	71	42.7	22	0.71	38	0
2018	59.3	28	78.6	16	40	59	0.13	82	0
2017	55.8	76	70.5	84	41.1	36	1.07	27	0
2016	56	70	71.1	81	40.3	53	0.50	48	1
2015	59	32	76.7	32	41.3	34	0.89	31	0
2014			74.6	53			1.11	25	6
2013	58.5	37	72.3	72	44.7	6	1.69	12	0
2012	59.2	30	78.2	18	40.1	55	0.23	74	0
2011	61.1	11	80.6	4	41.6	31	0.11	84	0
2010	57.2	52	75.2	47	39.2	76	1.25	18	0
2009	61.8	6	80.8	3	42.8	19	0.32	64	0
2008	56.4	64	74.5	56	38.3	88	0.36	60	0
2007	55.3	81	71.9	74	38.7	80	0.32	64	0
2006	54.8	85	71.5	75	38	92	0.83	35	0
2005	56	70	72.9	68	39	77	0.72	37	0
2004	54.8	85	70	88	39.7	66	0.58	45	1
2003	57.2	52	74.9	49	39.7	66	0.13	82	2
2002	57.1	55	74.6	53	39.6	71	0.27	71	0
2001	60.2	18	77.6	26	42.8	19	2.33	3	0
2000	55.6	78	71.5	75	39.7	66	0.78	36	0
1999	55.9	72	73.6	61	38.2	90	0.01	105	2
1998									18
1995					43.1	14	0.29	69	6
1994					45.1	5	0.14	81	5
1993	58.1	39	76	40	39.4	74	0.06	95	2
1992					41	40	0.38	57	6
1991	60.7	12	77	27	44.5	7	0.71	38	0
1990	63.1	1	80.9	2	45.3	4	0.07	91	0
1989	59	32	75.9	41	42	29	0.42	51	0
1988	57.3	48	74.5	56	40.1	55	0.10	85	0
1987	60.5	14	78.6	16	42.4	24	0.00	109	0
1986	50.5	101	62.8	105	38.3	88	1.71	11	0
1985	50.3	102	63.9	104	36.8	102	1.72	10	1
1984	53.8	92	68.8	96	38.7	80	0.30	67	0
1983	57	56	72.9	68	40.9	42	0.49	49	1
1982			69.2	92			1.99	7	8
1981	59.4	27	75.8	43	43	16	0.07	91	0
1980	55.9	72	71.2	79	40.5	50	1.80	9	0
1979	61.8	6	80.6	4	42.9	17	0.03	100	1
1978	55.4	80	69.7	89	41.1	36	1.35	15	0
1977	55.2	83	71.4	77	39.4	74	1.13	23	3
1976	56.5	62	72.3	72	40.6	49	2.28	4	0
1975	57.3	48	76.1	39	38.6	83	0.08	89	0
1974	58.1	39	76.6	34	39.7	66	0.05	97	1
1973	55.5	79	71.2	79	39.8	63	0.66	42	0
1972	56.7	60	73.5	64	40	59	0.53	46	0
1971	53.6	93	70.1	86	37	99	0.28	70	0
1970	54.1	89	70.2	85	37.9	93	0.42	51	0
1969	59.6	25	77	27	42.2	25	0.32	64	0
1968	56.2	67	71.4	77	41.1	36	2.28	4	0
1967	62.5	3	80.5	6	44.5	7	0.34	62	0
1966	62.6	2	79.5	10	45.6	2	0.84	33	0
1965	51.3	100	66.5	101	36.2	103	0.67	41	0
1964	56.1	68	73.8	60	38.5	85	0.02	104	0
1963	61.7	8	76.8	30	46.6	1	1.33	16	0
1962	59.8	22	78	20	41.6	31	0.22	76	1
1961	53.1	95	67.7	98	38.6	83	1.89	8	0
1960	61.7	8	77.9	22	45.5	3	0.84	33	0
1959	56.1	68	69.2	92	43.1	14	1.25	18	1
1958	58.3	38	75.8	43	40.8	44	trace	107	1
1957	59.3	28	77.8	24	40.9	42	0.08	89	0
1956	58.7	35	77.7	25	39.6	71	0.48	50	0
1955	56.9	58	73.5	64	40.4	52	0.33	63	1
1954	57.8	43	75.1	48	40.8	44	0.37	59	1
1953	60	20	78.1	19	42.1	26	0.10	85	1
1952	60.5	14	79.5	10	41.4	33	0.03	100	0
1951	56.6	61	73.5	64	39.7	66	0.01	105	0
1950	55.9	72	69.6	91	42.1	26	2.16	6	0
1949	59.5	26	76.4	35	42.5	23	0.21	77	0
1948	58	41	75.9	41	40.1	55	0.09	88	1
1947	57.2	52	74.8	50	39.5	73	1.12	24	0
1946							1.54	14	4
1945	54.9	84	71	82	38.8	79	0.26	73	0
1944					40.5	50	0.23	74	5
1943	59.8	22	78.8	15	40.8	44	0.20	78	0
1942	58	41	75.8	43	40.1	55	0.06	95	0
1941	51.6	98	65.4	102	37.8	94	0.39	54	0
1940	56.5	62	68.9	95	44.1	10	2.83	1	0
1939	58.7	35	76.2	37	41.2	35	0.66	42	0
1938	62	4	79.7	9	44.3	9	0.03	100	0
1937	59.8	22	76.8	30	42.8	19	0.94	30	0
1936	55.3	81	73.6	61	37	99	0.27	71	0
1935	59.1	31	78	20	40.2	54	trace	107	0
1934	54.6	88	70.1	86	39	77	0.69	40	0
1933	55.9	72	74.2	58	37.6	95	0.05	97	0
1932	56.9	58	77.9	22	36	104	0.03	100	0
1931	53.6	93	67.1	99	40	59	1.66	13	0
1930	56.4	64	75.3	46	37.1	96	1.29	17	1
1929									8
1928	60.4	17	83.6	1	37.1	96	0.16	79	3
1927	57	56	77	27	37	99			0
1926	54	90	74	59	33.9	106	0.39	54	0
1925	54.7	87	68	97	41	40	1.15	22	3
1924	53.1	95	69.1	94	37.1	96	0.39	54	1
1923	57.3	48	74.7	52	39.9	62	0.10	85	0
1922	57.6	45	76.2	37	38.5	85	0.07	91	1
1921	49.8	103	65.3	103	34.3	105	0.64	44	0
1920	54	90	69.7	89	38.2	90	1.01	29	0
1919	56.4	64	72.9	68	39.8	63	0.52	47	0
1918	55.8	76	71	82	40.7	47	2.54	2	0
1917	57.3	48	74.8	50	39.8	63	1.08	26	0
1916	57.4	47	76.3	36	38.4	87	0.16	79	0
1915	52.9	97	67.1	99	38.7	80	1.22	21	0
1914	51.4	99	73.3	67	29.5	107	0.38	57	0
1899	60.5	14	79.1	13	42	29	0.40	53	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1990	63.1
1966	62.6
1967	62.5
1938	62
2022	61.9
2009	61.8
1979	61.8
1963	61.7
1960	61.7
2024	61.6

Coldest
Year	Mean, °F
1921	49.8
1985	50.3
1986	50.5
1965	51.3
1914	51.4
1941	51.6
1915	52.9
1961	53.1
1924	53.1
1971	53.6
More years share the last value

Wettest
Year	Precipitation, in
1940	2.83
1918	2.54
2001	2.33
1976	2.28
1968	2.28
1950	2.16
1982	1.99
1961	1.89
1980	1.80
1985	1.72

Driest
Year	Precipitation, in
1987	0.00
1958	trace
1935	trace
1999	0.01
1951	0.01
1964	0.02
1979	0.03
1952	0.03
1938	0.03
1932	0.03

The hottest, coldest and wettest days

Hottest day: 84°F; 1 September 2026
Coldest night: 33°F; 15 September 2026
Wettest day: 0.43 in; 17 September 2026

Every month, season and year

Months

Seasons

Years

Challis, ID the day's answers

All-time records

Every answer in words

September 2026 brought 0.85 in of precipitation in Challis, ID, the wettest September since 2025, 32nd wettest of 109.
The hottest day of September 2026 in Challis, ID: 84°F on Tuesday 1 September 2026.
The coldest night of September 2026 in Challis, ID: a low of 33°F on Tuesday 15 September 2026.
The wettest day of September 2026 in Challis, ID: 0.43 in on Thursday 17 September 2026.