Olympia, WA: September

30 September 2026: September 2026 averaged 57.6°F in Olympia, WA, the coldest September since 2005, tied 24th coldest of 79 (with 2000).

September 2026

Mean temperature: 57.6°F; Coldest since 2005; 24th coldest of 79
Precipitation: 1.91 in; Driest since 2025; 38th driest of 79

A normal September in Olympia, WA (1991 to 2020): a mean temperature of 59.2°F, between 57.1°F and 61.6°F in eight years of ten and 1.75 in of precipitation, between 0.11 in and 3.95 in in eight years of ten.

The mean temperature of every September in Olympia, WA since 1948: 57.6°F in 2026; the lowest is 54.8°F, in 1965.

Normal range, 57.1 to 61.6°F

Every year, ranked, as a table

Every September in Olympia, WA 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
2026	57.6	55	69.4	58	45.7	39	1.91	41
2025	61.7	9	74.3	19	49	8	1.28	55
2024	61.2	11	73.1	25	49.3	6	1.91	41
2023	59.6	24	72.5	29	46.6	28	2.30	27
2022	62.1	8	76.4	5	47.8	14	0.13	73
2021	59.7	21	72.2	34	47.3	20	3.31	14
2020	62.6	2	74.8	11	50.4	3	3.33	13
2019	59.3	31	68.8	64	49.7	5	3.43	11
2018	58	48	70.9	46	45.1	47	2.06	36
2017	61.5	10	74.6	15	48.4	10	1.24	56
2016	58.1	46	70.7	47	45.5	43	1.73	49
2015	57.9	49	70.2	54	45.6	41	0.90	60
2014	61.1	12	74.7	12	47.5	16	3.07	16
2013	60.9	14	69.7	57	52.1	1	9.36	1
2012	58.5	40	74.1	21	42.8	71	trace	76
2011	60.9	14	74.6	15	47.3	20	1.62	50
2010	59.1	36	68	72	50.2	4	5.79	3
2009	59.6	24	72.6	28	46.5	32	2.49	23
2008	58.5	40	72	37	45.1	47	0.27	72
2007	57.8	50	68.9	63	46.7	27	2.24	30
2006	59.6	24	74.4	18	44.8	53	0.69	61
2005	56.6	67	70.3	51	42.8	71	1.76	47
2004	57.1	60	67.3	76	46.8	25	3.88	10
2003	60.4	17	74.1	21	46.6	28	1.17	59
2002	57.5	57	72.1	36	43	69	0.59	64
2001	57.5	57	70.1	55	44.9	52	0.53	65
2000	57.6	55	70.7	47	44.5	56	1.98	37
1999	57.1	60	73	26	41.1	79	0.12	74
1998	60.4	17	76.1	7	44.7	54	0.31	70
1997	60.7	16	72.3	33	49.1	7	4.57	7
1996	56.2	71	67.9	73	44.4	58	2.21	31
1995	62.3	5	75.6	8	48.9	9	1.97	38
1994	62.2	7	76.3	6	48.1	11	1.52	51
1993	59.7	21	76.7	4	42.6	73	trace	76
1992	58.2	44	72.4	32	44	60	2.44	25
1991	59.7	21	74.3	19	45.1	47	trace	76
1990	61.1	12	74.1	21	48.1	11	0.03	75
1989	59.4	29	75.6	8	43.2	66	0.49	67
1988	57.2	59	71	43	43.5	63	1.93	40
1987	60.1	19	75.1	10	45.1	47	0.29	71
1986	57.1	60	68.3	67	46	36	3.38	12
1985	56.6	67	68.2	68	45	51	2.65	21
1984	58.1	46	71	43	45.3	45	1.76	47
1983	56.2	71	69.3	59	43.2	66	1.89	43
1982	59.4	29	72.5	29	46.4	35	1.89	43
1981	60	20	74.5	17	45.5	43	2.44	25
1980	59.5	28	71.6	42	47.5	16	2.21	31
1979	59.3	31	72	37	46.5	32	2.72	19
1978	56.8	65	65.8	79	47.7	15	7.59	2
1977	56.7	66	67.7	75	45.7	39	4.58	6
1976	58.9	37	70.7	47	47.1	23	1.22	57
1975	57.8	50	73.4	24	42.2	75	trace	76
1974	63.2	1	79.6	1	46.8	25	0.50	66
1973	58.8	39	72.2	34	45.3	45	2.18	34
1972	55.1	77	67.8	74	42.3	74	5.04	5
1971	55.2	76	69.1	61	41.4	77	3.06	17
1970	55.1	77	67.1	77	43	69	3.20	15
1969	58.9	37	70.3	51	47.4	18	5.23	4
1968	57.7	54	68.7	65	46.6	28	2.51	22
1967	62.3	5	78	2	46.5	32	1.36	54
1966	59.3	31	71.8	41	46.9	24	1.95	39
1965	54.8	79	68.2	68	41.4	77	0.60	63
1964	55.9	75	68.2	68	43.5	63	2.26	29
1963	62.6	2	74.7	12	50.5	2	2.16	35
1962	58.3	43	71	43	45.6	41	2.45	24
1961	56	74	70.4	50	41.6	76	0.33	69
1960	56.4	69	69.8	56	43.1	68	1.21	58
1959	56.9	64	66.6	78	47.2	22	4.26	8
1958	58.4	42	70.3	51	46.6	28	1.52	51
1957	62.6	2	77.2	3	48	13	0.66	62
1956	57	63	69.2	60	44.7	54	2.30	27
1955	56.3	70	68.7	65	43.9	61	1.84	46
1954	57.8	50	68.1	71	47.4	18	1.89	43
1953	58.2	44	72	37	44.3	59	2.68	20
1952	59.6	24	74.7	12	44.5	56	0.43	68
1951	59.2	34	72.5	29	45.9	37	2.83	18
1950	57.8	50	71.9	40	43.6	62	2.19	33
1949	59.2	34	72.7	27	45.8	38	1.39	53
1948	56.2	71	69	62	43.5	63	3.92	9

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1974	63.2
2020	62.6
1963	62.6
1957	62.6
1995	62.3
1967	62.3
1994	62.2
2022	62.1
2025	61.7
2017	61.5

Coldest
Year	Mean, °F
1965	54.8
1972	55.1
1970	55.1
1971	55.2
1964	55.9
1961	56
1996	56.2
1983	56.2
1948	56.2
1955	56.3

Wettest
Year	Precipitation, in
2013	9.36
1978	7.59
2010	5.79
1969	5.23
1972	5.04
1977	4.58
1997	4.57
1959	4.26
1948	3.92
2004	3.88

Driest
Year	Precipitation, in
2012	trace
1993	trace
1991	trace
1975	trace
1990	0.03
1999	0.12
2022	0.13
2008	0.27
1987	0.29
1998	0.31

The hottest, coldest and wettest days

Hottest day: 82°F; 9 September 2026
Coldest night: 34°F; 28 September 2026
Wettest day: 0.69 in; 24 September 2026

Every month, season and year

Months

Seasons

Years

Olympia, WA the day's answers

All-time records

Every answer in words

September 2026 brought 1.91 in of precipitation in Olympia, WA, the driest September since 2025, tied 38th driest of 79 (with 2024).
The hottest day of September 2026 in Olympia, WA: 82°F on Wednesday 9 September 2026.
The coldest night of September 2026 in Olympia, WA: a low of 34°F on Monday 28 September 2026.
The wettest day of September 2026 in Olympia, WA: 0.69 in on Thursday 24 September 2026.