Tri-Cities, WA

An ordinary day: 4 October 2026 was cooler than 15 of 125 earlier years.

Sunday 4 October 2026

High: 80°F; Warmest since 2023; 16th warmest of 126
Low: 45°F; Warmest since 2023; 50th warmest of 124

No measurable precipitation in Tri-Cities, WA for 9 days to Sunday 4 October 2026.

Every 4 October high in Tri-Cities, WA since 1894: 80°F in 2026; the highest is 88°F, in 1917.

Normal range, 64.9 to 80°F

Every year as a table

Every 4 October low in Tri-Cities, WA since 1894: 45°F in 2026; the lowest is 30°F, in 1999 and 1898.

Year	High, °F	Low, °F
2026	80	45
2025	74	44
2024	65	34
2023	80	53
2022	82	46
2021	75	43
2020	87	46
2019	68	45
2018	65	39
2017	67	36
2016	71	52
2015	74	44
2014	80	39
2013	66	31
2012	69	34
2011	66	53
2010	73	50
2009	70	46
2008	71	53
2007	63	44
2006	64	48
2005	64	37
2004	80	37
2003	83	44
2002	67	50
2001	74	35
2000	67	33
1999	72	30
1998	67	36
1997	74	54
1996	79	49
1995	69	48
1994	67	44
1993	80	47
1992	68	49
1991	74	40
1990	72	55
1989	68	38
1988	81	50
1987	82	51
1986	72	43
1985	74	36
1984	77	42
1983	75
1982	68
1981	65	35
1980	80	48
1978	76	39
1977	67	35
1976	64	38
1975	71	44
1974	65	42
1973	70	32
1972	73	41
1971	80	59
1970	82	46
1969	61	38
1968	70	45
1967	67	40
1966	74	39
1965	74	52
1964	66	41
1963	70	53
1962	67	45
1961	73	38
1960	81	45
1959	71	41
1958	80	42
1957	60	38
1956	69	36
1955	61	50
1954	65	42
1953	73	44
1952	77	42
1951	66	48
1950	59	42
1949	63	48
1948	68	55
1947	75	55
1946	57	43
1945	73	51
1944	67	51
1943	80	51
1942	81	47
1941	61	42
1940	66	47
1939	63	50
1938	64	55
1937	63	36
1936	70	51
1935	70	57
1934	68	37
1933	82	41
1932	76	44
1931	64	43
1930	72	52
1929	81	60
1928	65	44
1927	60	46
1926	72	38
1925	70	34
1924	67	46
1923	65	55
1922	66	48
1921	82	32
1920	82	50
1919	71	32
1918	73	55
1917	88	42
1916	64	32
1915	68	42
1914	67	48
1912	67	42
1911	60	37
1910	76	52
1909	76	41
1908	74	35
1907	82	41
1906	65	39
1905	65	52
1899	75	40
1898	67	30
1897	75	41
1896	80	39
1895	73	42
1894	83	57

The forecast

Date	High	Low
6 October	80°FRecord 90°F, 2020	49°FRecord 27°F, 2012, 1974
7 October	Record 88°F, 2014, 1943	Record 28°F, 1974

The month and the year

Every year's 1 to 4 October in Tri-Cities, WA, ranked by its mean temperature: October 2026 so far is the 31st warmest of 120.

Every year, ranked, as a table

Rank	Year	Mean, °F
1	1910	70.1
2	1947	69.3
3	1917	67.5
4	1988	67.3
5	1943	66.5
6	1896	65.8
7	1992	65.3
8	2022	64.6
9	1993	64.5
10	1932	64.4
11	2020	64.3
11	1987	64.3
13	1918	64.1
14	2008	63.9
14	1963	63.9
16	1935	63.6
17	2010	63.5
18	1997	63.4
18	1991	63.4
20	1965	63
20	1938	63
20	1920	63
23	1942	62.9
24	2011	62.8
24	2003	62.8
26	1915	62.6
26	1894	62.6
28	1980	62.5
28	1951	62.5
30	1958	62.3
31	2026	61.9
32	2023	61.6
32	2015	61.6
32	1960	61.6
35	1990	61.5
36	1952	61.4
36	1923	61.4
38	1996	60.9
38	1994	60.9
40	1970	60.8
40	1945	60.8
40	1929	60.8
43	1909	60.6
44	1936	60.4
45	1995	60.3
45	1944	60.3
47	1972	60.1
48	1930	59.8
49	1971	59.6
49	1897	59.6
51	1906	59.5
52	2025	59.1
53	1895	59
54	1934	58.9
55	1962	58.8
56	1975	58.6
57	2021	58.5
57	2016	58.5
57	1914	58.5
57	1907	58.5
61	1967	58.4
62	2001	58.3
63	1924	58.1
64	1948	57.9
64	1928	57.9
66	1939	57.8
67	1984	57.6
67	1931	57.6
67	1908	57.6
70	2004	57.4
70	1905	57.4
72	2007	57.3
73	1989	57
73	1968	57
73	1899	57
76	1955	56.9
77	2012	56.6
78	1966	56.5
79	2014	56.4
79	1998	56.4
81	1919	56.1
82	1986	56
82	1912	56
84	2018	55.9
84	1926	55.9
86	1974	55.6
86	1969	55.6
86	1941	55.6
89	2006	55.5
90	1981	55.4
90	1964	55.4
90	1953	55.4
90	1949	55.4
94	1956	55.3
94	1933	55.3
96	1911	55.1
97	1961	55
98	2017	54.9
99	2000	54.6
100	1957	54.4
100	1940	54.4
102	2024	54.3
103	2009	54.1
104	1946	54
105	1921	53.8
106	1977	53.5
106	1922	53.5
108	1959	53
109	2005	52.8
110	2002	52.6
111	1898	52.5
112	1937	52
113	1925	51.8
114	2019	51.6
115	1973	51.3
116	1999	50.9
117	2013	50.5
118	1954	50.3
119	1916	49.6
120	1950	47.1

Every day as a table

Daily highs and lows in Tri-Cities, WA, 1 to 4 October 2026, with each date's record range and its 1991 to 2020 normal range.

Day	High, °F	Low, °F	Record high	Year	Record low	Year	Normal high	Normal low
1 October 2026	77	42	88	1943	26	1954	78.5	46
2 October 2026	83	42	89	1991	29	1921	73	44.5
3 October 2026	82	44	85	1943	27	1999	70	43
4 October 2026	80	45	88	1917	30	1999	69.5	44

The warmest, coldest and wettest on this date

The 20 warmest 4 October highs in Tri-Cities, WA since 1894.
Rank	Year	High, °F
1	1917	88
2	2020	87
3	2003	83
3	1894	83
5	2022	82
5	1987	82
5	1970	82
5	1933	82
5	1921	82
5	1920	82
5	1907	82
12	1988	81
12	1960	81
12	1942	81
12	1929	81
16	2026	80
16	2023	80
16	2014	80
16	2004	80
16	1993	80

The 20 coldest 4 October lows in Tri-Cities, WA since 1894.
Rank	Year	Low, °F
1	1999	30
1	1898	30
3	2013	31
4	1973	32
4	1921	32
4	1919	32
4	1916	32
8	2000	33
9	2024	34
9	2012	34
9	1925	34
12	2001	35
12	1981	35
12	1977	35
12	1908	35
16	2017	36
16	1998	36
16	1985	36
16	1956	36
16	1937	36

The 20 wettest 4 October days in Tri-Cities, WA since 1894.
Rank	Year	Precipitation, in
1	1948	0.20
2	1923	0.15
3	1946	0.14
3	1938	0.14
5	1935	0.13
6	1950	0.10
7	2011	0.09
8	1995	0.07
8	1905	0.07
10	1949	0.06
10	1941	0.06
12	1944	0.05
12	1939	0.05
14	2006	0.04
15	1992	0.03
15	1931	0.03
17	2024	0.02
17	2008	0.02
17	1997	0.02
17	1955	0.02

Every answer in words

Sunday 4 October 2026: a high of 80°F in Tri-Cities, WA, the warmest 4 October since 2023, tied 16th warmest of 126 (with 2023, 2014, 2004 and 6 other years).
Sunday 4 October 2026: a low of 45°F in Tri-Cities, WA, the warmest 4 October night since 2023, tied 50th warmest of 124 (with 2019, 1968, 1962 and 1 other year).
Forecast for Tuesday 6 October 2026: a high of 80°F in Tri-Cities, WA, which would be the warmest 6 October since 2022, tied 12th warmest of 126 (with 1945, 1917, 1906 and 1 other year) (National Weather Service forecast).
Forecast for Tuesday 6 October 2026: a low of 49°F in Tri-Cities, WA, which would be the warmest 6 October night since 2011, tied 19th warmest of 125 (with 2003, 1967, 1926 and 3 other years) (National Weather Service forecast).
Tri-Cities, WA on 6 October: record high 90°F (2020), record low 27°F (2012 and 1974).
Tri-Cities, WA on 7 October: record high 88°F (2014 and 1943), record low 28°F (1974).
October 2026 so far averaged 61.9°F in Tri-Cities, WA, the warmest 1 to 4 October since 2022, 31st warmest of 120.
Fall 2026 so far averaged 63.1°F in Tri-Cities, WA, the coldest 1 September to 4 October since 2018, tied 49th coldest of 120 (with 1934).
Fall 2026 so far brought 0.33 in of precipitation in Tri-Cities, WA, the wettest 1 September to 4 October since 2023, tied 53rd wettest of 116 (with 1920 and 1919).
2026 so far averaged 58.5°F in Tri-Cities, WA, the warmest 1 January to 4 October since 2023, tied 25th warmest of 114 (with 2023, 2022, 1984 and 2 other years).
2026 so far brought 3.93 in of precipitation in Tri-Cities, WA, the driest 1 January to 4 October since 2024, 29th driest of 100.
The 30 days to Sunday 4 October 2026 brought 0.28 in of precipitation in Tri-Cities, WA, the driest 30 days to 4 October since 2025, tied 63rd driest of 116 (with 1905).
The 60 days to Sunday 4 October 2026 brought 0.42 in of precipitation in Tri-Cities, WA, the driest 60 days to 4 October since 2025, tied 54th driest of 116 (with 2021, 1990 and 1948).
The 90 days to Sunday 4 October 2026 brought 0.46 in of precipitation in Tri-Cities, WA, the driest 90 days to 4 October since 2025, 42nd driest of 112.
Tri-Cities, WA has had 60 days at 90°F or above in 2026 through 4 October, the most by that date since 2025, 29th most of 119.
Tri-Cities, WA has had 9 days at 100°F or above in 2026 through 4 October, the most by that date since 2025, tied 51st most of 119 (with 2008, 2002, 1996 and 5 other years).
Tri-Cities, WA has had 53 freezing nights (a low of 32°F or below) in 2026 through 4 October, the most by that date since 2025, tied 72nd most of 116 (with 2024, 1991, 1988 and 2 other years).
The last freeze of spring 2026 in Tri-Cities, WA came on Sunday 26 April 2026, the latest since 2025, tied 67th latest of 116 (with 2015 and 1998).

Nearby

Pendleton, OR 41.8 mi
Yakima, WA 70.5 mi
Lewiston, ID 100.6 mi
Pullman, WA 100.7 mi
Baker City, OR 117.1 mi
Franklin County, WA county average
Washington every city and county

All-time records

About these figures

Daily records for Tri-Cities, WA run from 1894 to 4 October 2026, with 2496 days missing; current station PASCO TRI CITIES AIRPORT.

Our calculation from NOAA records for Tri-Cities, WA, 1894 to 2026. Preliminary until NOAA's final data.