Mount Shasta, CA: September

30 September 2026: September 2026 averaged 59.1°F in Mount Shasta, CA, the coldest September since 2007, 18th coldest of 76.

September 2026

Mean temperature: 59.1°F; Coldest since 2007; 18th coldest of 76
Precipitation: 0.42 in; Wettest since 2025; 35th wettest of 75

A normal September in Mount Shasta, CA (1991 to 2020): a mean temperature of 61.6°F, between 59.4°F and 64.6°F in eight years of ten and 0.27 in of precipitation, between 0.00 in and 1.50 in in eight years of ten.

The mean temperature of every September in Mount Shasta, CA since 1948: 59.1°F in 2026; the lowest is 54.9°F, in 1978.

Normal range, 59.4 to 64.6°F

Every year, ranked, as a table

Every September in Mount Shasta, CA from 1948 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	59.1	59	75.3	57	42.9	56	0.42	35	0
2025	63	19	78.7	31	47.3	8	0.78	26	0
2024	64.9	8	81.9	12	48	1	0.43	34	0
2023	60.4	48	75.1	60	45.7	20	1.61	11	0
2022	64.5	12	81.8	14	47.4	6	1.09	20	1
2021	62.9	21	81.1	17	44.8	37	0.83	24	0
2020	65.4	1	84.3	2	46.5	13	0.00	71	0
2019	59.5	57	74.6	65	44.4	39	1.45	14	0
2018	61.3	37	78.6	33	44	44	0.25	47	0
2017	63	19	79	28	46.9	9	0.28	44	0
2016	62.4	26	79.3	23	45.5	22	0.08	60	0
2015	62.2	27	80	21	44.3	42	0.28	44	0
2014	63.9	14	81.2	16	46.6	11	2.56	5	0
2013	60.8	42	75.9	52	45.7	20	1.71	10	0
2012	65.1	3	85	1	45.1	31	0.00	71	0
2011	65	5	84	4	46	18	0.30	41	0
2010	60.9	41	78.3	36	43.4	52	1.08	21	0
2009	63.9	14	82.4	10	45.5	22	0.29	43	0
2008	62.8	22	81.9	12	43.8	49	trace	66	3
2007	58.7	60	75.1	60	42.3	63	0.35	38	0
2006	61.2	38	79.3	23	43	55	trace	66	0
2005	58.5	63	75.9	52	41.2	72	0.10	58	0
2004	60.2	51	77.5	43	42.9	56	0.09	59	0
2003	63.5	16	81	18	45.9	19	0.20	49	0
2002	61.6	33	79.3	23	43.9	45	0.81	25	0
2001	62	28	78.8	30	45.2	28	1.61	11	0
2000	59.5	57	74.7	64	44.4	39	0.35	38	0
1999	62.8	22	80.7	20	44.9	35	0.00	71	1
1998	62.7	24	77.7	41	47.8	2	1.10	18	0
1997	60.3	49	75.3	57	45.3	27			0
1996	57.8	68	73.6	67	42	65			0
1995	60.8	42	77.7	41	43.9	45	trace	66	2
1994	61.5	35	78.6	33	44.4	39	0.46	33	0
1993	60	54	78.7	31	41.2	72	0.05	64	0
1992	60.5	46	77.4	45	43.5	50	0.18	51	0
1991	64.6	10	83.9	5	45.2	28	0.08	60	0
1990	60.3	49	77	49	43.5	50	0.14	53	0
1989	58.7	60	75.3	57	42	65	2.14	6	0
1988	60.5	46	79.1	27	41.8	68	0.00	71	0
1986					40	77	3.84	2	5
1985	55.2	75	69.2	76	41.3	71	1.34	16	0
1984									5
1983	60.7	44	76.2	51	45.1	31	1.10	18	0
1982	56.4	74	70.3	74	42.5	61	1.45	14	0
1981	62	28	78.6	33	45.4	26	0.74	27	0
1980	59.8	56	77.2	48	42.4	62	0.93	22	0
1979	62.5	25	80	21	44.9	35	0.58	29	0
1978	54.9	76	69.4	75	40.4	74	3.49	3	0
1977	57.3	72	71.9	72	42.7	60	3.01	4	0
1976	61.9	31	77.5	43	46.3	14	0.36	37	0
1975	65	5	83.6	6	46.3	14	trace	66	0
1974	65.2	2	84.1	3	46.2	16	0.00	71	0
1973	59.9	55	75.8	55	43.9	45	1.46	13	0
1972	57.4	71	73.3	69	41.4	69	0.41	36	0
1971	57.7	69	73	70	42.3	63	0.30	41	0
1970	58.5	63	74.9	62	42	65	0.08	60	0
1969	62	28	77.4	45	46.6	11	0.13	54	0
1968	60.7	44	78.1	37	43.4	52	0.15	52	0
1967	64.6	10	81.6	15	47.5	4	0.07	63	0
1966	61.5	35	78	40	45	34	0.56	31	0
1965	57.9	67	75.6	56	40.2	76	trace	66	0
1964	58.6	62	75.9	52	41.4	69	0.13	54	0
1963	63.2	17	78.9	29	47.4	6	0.65	28	0
1962	63.1	18	81	18	45.2	28	0.57	30	0
1961	57.7	69	72.6	71	42.8	59	0.50	32	0
1960	64.4	13	82.5	9	46.2	16	0.13	54	0
1959	58	66	71.9	72	44.2	43	1.95	9	0
1958	60.2	51	74.9	62	45.5	22	1.28	17	0
1957	61.6	33	78.1	37	45.1	31	6.83	1	0
1956	60.1	53	77.3	47	42.9	56	0.20	49	0
1955	61	39	78.1	37	43.9	45	0.92	23	0
1954	57.1	73	73.7	66	40.4	74	0.13	54	0
1953	65.1	3	82.7	7	47.5	4	0.02	65	0
1952	65	5	82.4	10	47.6	3	0.34	40	0
1951	64.7	9	82.6	8	46.7	10	0.27	46	0
1950	61	39	76.5	50	45.5	22	2.08	8	0
1949	61.9	31	79.3	23	44.5	38	0.24	48	0
1948	58.4	65	73.5	68	43.2	54	2.14	6	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2020	65.4
1974	65.2
2012	65.1
1953	65.1
2011	65
1975	65
1952	65
2024	64.9
1951	64.7
1991	64.6
More years share the last value

Coldest
Year	Mean, °F
1978	54.9
1985	55.2
1982	56.4
1954	57.1
1977	57.3
1972	57.4
1971	57.7
1961	57.7
1996	57.8
1965	57.9

Wettest
Year	Precipitation, in
1957	6.83
1986	3.84
1978	3.49
1977	3.01
2014	2.56
1989	2.14
1948	2.14
1950	2.08
1959	1.95
2013	1.71

Driest
Year	Precipitation, in
2020	0.00
2012	0.00
1999	0.00
1988	0.00
1974	0.00
2008	trace
2006	trace
1995	trace
1975	trace
1965	trace

The hottest, coldest and wettest days

Hottest day: 90°F; 9 September 2026
Coldest night: 33°F; 4 September 2026
Wettest day: 0.22 in; 2 September 2026

Every month, season and year

Months

Seasons

Years

Mount Shasta, CA the day's answers

All-time records

Every answer in words

September 2026 brought 0.42 in of precipitation in Mount Shasta, CA, the wettest September since 2025, 35th wettest of 75.
The hottest day of September 2026 in Mount Shasta, CA: 90°F on Wednesday 9 September 2026.
The coldest night of September 2026 in Mount Shasta, CA: a low of 33°F on Friday 4 September 2026.
The wettest day of September 2026 in Mount Shasta, CA: 0.22 in on Wednesday 2 September 2026.