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Topics / Climate / United States / Washington

Was September normal in Washington?

September 2026 · 39 counties · data family: climatedata.dev

Near normal

56.7°FStatewide average temperature, September 2026

-1.7°F against the 1991–2020 normal of 58.4°F
56th coolest September of 132 since 1895
Of 39 counties: 34 near normal, 5 cooler
Furthest above normal: Whitman County (-0.4°F); furthest below: Skamania County (-3.2°F)
Precipitation 2.30 in, 134% of normal: wetter than normal

Every Washington county, September 2026September 2026 by county: 34 near normal, 5 cooler; furthest above normal Whitman County (-0.4°F), furthest below Skamania County (-3.2°F).Choose a county to see its answer. The colour shows how far each county was from its own 1991–2020 normal.

+1 to +2°F 0
within 1°F 3
−1 to −2°F 25
−2 to −3°F 10
−3 to −4°F 1

Much warmer than normal 0
Warmer than normal 0
Near normal 34
Cooler than normal 5
Much cooler than normal 0

Every September since 1895, Washington statewideSeptember 2026 averaged 56.7°F, -1.7°F against the 1991–2020 normal: the 56th coolest September of 132 since 1895.

Show the numbers (132 rows)

Year	September average
2026	56.7°F
2025	63.6°F
2024	61.7°F
2023	58.3°F
2022	61.7°F
2021	58.0°F
2020	61.2°F
2019	57.1°F
2018	56.3°F
2017	59.8°F
2016	56.4°F
2015	56.2°F
2014	59.8°F
2013	59.7°F
2012	59.7°F
2011	61.0°F
2010	57.1°F
2009	59.9°F
2008	57.8°F
2007	56.7°F
2006	58.8°F
2005	55.7°F
2004	56.1°F
2003	60.0°F
2002	57.5°F
2001	59.8°F
2000	56.3°F
1999	57.1°F
1998	62.2°F
1997	59.2°F
1996	55.0°F
1995	60.8°F
1994	61.2°F
1993	58.4°F
1992	55.4°F
1991	60.4°F
1990	62.2°F
1989	59.0°F
1988	57.3°F
1987	60.6°F
1986	54.1°F
1985	53.1°F
1984	54.7°F
1983	54.1°F
1982	57.2°F
1981	57.7°F
1980	57.1°F
1979	60.0°F
1978	55.1°F
1977	54.2°F
1976	59.7°F
1975	58.6°F
1974	59.8°F
1973	57.6°F
1972	53.0°F
1971	53.4°F
1970	53.2°F
1969	57.4°F
1968	57.1°F
1967	62.3°F
1966	60.0°F
1965	54.1°F
1964	54.4°F
1963	61.6°F
1962	58.0°F
1961	54.3°F
1960	56.9°F
1959	54.5°F
1958	56.5°F
1957	60.4°F
1956	57.0°F
1955	56.5°F
1954	56.1°F
1953	58.2°F
1952	59.7°F
1951	58.0°F
1950	58.2°F
1949	58.4°F
1948	55.5°F
1947	57.7°F
1946	56.0°F
1945	55.0°F
1944	59.6°F
1943	59.7°F
1942	58.8°F
1941	53.4°F
1940	60.5°F
1939	58.1°F
1938	62.0°F
1937	58.3°F
1936	56.0°F
1935	59.2°F
1934	54.8°F
1933	53.0°F
1932	57.2°F
1931	55.8°F
1930	57.2°F
1929	55.8°F
1928	56.7°F
1927	54.7°F
1926	52.1°F
1925	56.7°F
1924	56.9°F
1923	58.5°F
1922	58.2°F
1921	52.2°F
1920	55.3°F
1919	56.0°F
1918	60.8°F
1917	57.3°F
1916	56.0°F
1915	55.6°F
1914	53.8°F
1913	55.8°F
1912	54.2°F
1911	53.5°F
1910	55.6°F
1909	58.0°F
1908	56.3°F
1907	55.6°F
1906	56.6°F
1905	57.0°F
1904	57.5°F
1903	53.7°F
1902	54.7°F
1901	52.9°F
1900	55.0°F
1899	58.0°F
1898	57.4°F
1897	54.6°F
1896	54.1°F
1895	51.0°F

All 39 counties, September 2026

Record rank: 1 is the warmest September on record for that county.


1	Whitman	60.4°F	−0.4°F	47 of 132	Near normal
2	Adams	60.8°F	−0.8°F	59 of 132	Near normal
3	Spokane	57.8°F	−0.9°F	59 of 132	Near normal
4	Kitsap	59.5°F	−1.0°F	57 of 132	Near normal
5	Skagit	55.2°F	−1.0°F	55 of 132	Near normal
6	Franklin	62.7°F	−1.1°F	65 of 132	Near normal
7	Lincoln	58.2°F	−1.1°F	68 of 132	Near normal
8	Mason	57.5°F	−1.1°F	63 of 132	Near normal
9	Pacific	58.1°F	−1.2°F	65 of 132	Near normal
10	Snohomish	55.3°F	−1.2°F	63 of 132	Near normal
11	Thurston	59.0°F	−1.2°F	68 of 132	Near normal
12	Whatcom	53.6°F	−1.2°F	54 of 132	Near normal
13	Benton	63.1°F	−1.3°F	71 of 132	Near normal
14	Garfield	58.9°F	−1.3°F	67 of 132	Near normal
15	Grays Harbor	57.6°F	−1.3°F	71 of 132	Near normal
16	Walla Walla	63.0°F	−1.3°F	64 of 132	Near normal
17	Island	57.5°F	−1.4°F	73 of 132	Near normal
18	Clallam	54.9°F	−1.5°F	75 of 132	Near normal
19	Jefferson	53.6°F	−1.6°F	75 of 132	Near normal
20	Okanogan	54.0°F	−1.6°F	68 of 132	Near normal
21	Columbia	58.1°F	−1.7°F	73 of 132	Near normal
22	Ferry	54.2°F	−1.7°F	73 of 132	Near normal
23	Pend Oreille	52.7°F	−1.8°F	76 of 132	Near normal
24	Chelan	53.6°F	−1.9°F	75 of 132	Near normal
25	King	55.5°F	−1.9°F	83 of 132	Near normal
26	Pierce	54.7°F	−1.9°F	75 of 132	Near normal
27	San Juan	56.5°F	−1.9°F	87 of 132	Near normal
28	Stevens	55.9°F	−1.9°F	77 of 132	Near normal
29	Wahkiakum	57.2°F	−2.0°F	82 of 132	Near normal
30	Douglas	59.6°F	−2.1°F	77 of 132	Near normal
31	Asotin	58.2°F	−2.2°F	78 of 132	Near normal
32	Grant	60.9°F	−2.2°F	85 of 132	Near normal
33	Klickitat	58.4°F	−2.4°F	82 of 132	Near normal
34	Lewis	55.2°F	−2.4°F	86 of 132	Near normal
35	Clark	59.3°F	−2.7°F	90 of 132	Cooler than normal
36	Cowlitz	57.0°F	−2.7°F	95 of 132	Cooler than normal
37	Kittitas	54.7°F	−2.8°F	95 of 132	Cooler than normal
38	Yakima	55.6°F	−2.8°F	89 of 132	Cooler than normal
39	Skamania	53.4°F	−3.2°F	96 of 132	Cooler than normal

Get this data

This page's numbers, as JSON:

curl https://visualizedata.org/data/topics/climate/us-wa.json

The climatedata.dev API it comes from (live, no key; every month since 1895 with its normal, anomaly and rank):

curl "https://api.climatedata.dev/v1/us-climate/tavg/us-wa.json"

Open the JSON

What this can't tell you

A statewide average is not the average of its counties: NOAA computes it from its own grid, weighted by area.
The most recent months are preliminary and NOAA revises them in the next release.

How the answer is decided

Each month is ranked against the same month in every year on record (since 1895 for most places). The top tenth of the record is 'much warmer than normal', the top third 'warmer', the middle third 'near normal'. Counties are coloured by the same five words.

Sources

climatedata.dev us-climate, version 2026-10-25.6c7474e6d8 (U.S. public domain)
NOAA Monthly U.S. Climate Divisional Database (nClimDiv), statewide and national files (U.S. public domain)
climatedata.dev county-climate, version 2026-10-25.b4bbb5298a (U.S. public domain)
U.S. Census Bureau TIGERweb, counties (generalised) (U.S. public domain)
Built 2026-10-26. Download every county's answer (JSON)

Every topic for one county: How's Hennepin County?