Tri-Cities, WA: May

31 May 2026: May 2026 averaged 63.9°F in Tri-Cities, WA, the warmest May since 2023, tied 24th warmest of 119 (with 1994).

May 2026

Mean temperature: 63.9°F; Warmest since 2023; 24th warmest of 119
Precipitation: 0.06 in; Driest since 2023; 8th driest of 124

A normal May in Tri-Cities, WA (1991 to 2020): a mean temperature of 61.7°F, between 58.3°F and 64.6°F in eight years of ten and 0.63 in of precipitation, between 0.29 in and 1.39 in in eight years of ten.

The mean temperature of every May in Tri-Cities, WA since 1895: 63.9°F in 2026; the highest is 67.5°F, in 1958.

Normal range, 58.3 to 64.6°F

Every year, ranked, as a table

Every May in Tri-Cities, WA from 1894 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	63.9	24	80.3	12	47.4	59	0.06	116	0
2025	60.9	74	77.5	49	44.3	103	0.90	23	0
2024	60.8	77	75.8	68	45.8	85	0.82	30	0
2023	67.2	3	82.4	4	51.9	4	0.03	119	0
2022	60	89	71.8	110	48.1	48	0.96	20	0
2021	63.2	32	79.1	25	47.3	60	0.19	102	0
2020	63	35	77.9	38	48	51	1.08	14	0
2019	65.6	7	81	10	50.2	13	0.63	44	0
2018	66.1	4	81.4	7	50.8	12	0.76	35	0
2017	61.3	66	77.7	41	44.9	98	0.48	64	0
2016	63.4	30	78.2	31	48.5	34	1.52	6	0
2015	64	23	79.8	17	48.2	44	1.28	9	0
2014	62.8	39	79	26	46.6	75	0.29	90	0
2013	61.7	59	77.2	51	46.2	79	0.62	46	0
2012	59.7	94	74.8	82	44.6	101	0.24	98	0
2011	56.7	118	70.7	118	42.6	119	1.40	7	0
2010	56.8	117	70.8	117	42.8	118	1.14	12	0
2009	60.7	78	77.8	39	43.6	114	0.52	61	0
2008	62	53	77	53	47.1	66	0.48	64	0
2007	60.9	74	78	35	43.8	112	0.58	53	0
2006	61.7	59	77.7	41	45.6	91	1.05	17	0
2005	63.7	27	77.6	46	49.7	18	0.90	23	0
2004	61.3	66	75	79	47.5	58	1.05	17	0
2003	60.1	85	74.5	87	45.6	91	0.49	62	0
2002	58.4	108	72.9	102	43.9	110	0.31	88	0
2001	61.6	61	79.4	24	43.8	112	0.16	106	0
2000	60.5	82	75	79	46	83	0.70	39	0
1999	57	116	72.4	107	41.5	120	0.61	48	0
1998	60.6	80	73.3	96	48	51	0.76	35	0
1997	64.2	19	77.4	50	51	10	0.59	51	0
1996	58.4	108	69.7	121	47.1	66	0.98	19	0
1995	62.7	42	75.4	72	50	15	0.38	76	0
1994	63.9	24	76	66	51.7	6	1.61	5	0
1993	66.1	4	78.5	28	53.7	1	0.62	46	0
1992	64.5	14	79.6	20	49.4	22	0.03	119	1
1991	59.2	99	69.5	122	48.8	27	1.39	8	0
1990	60.2	83	71.8	110	48.6	31	0.59	51	1
1989	60.6	80	72.6	104	48.5	34	0.48	64	1
1988	62	53	74.3	88	49.6	19	0.90	23	0
1987	65.3	8	78.1	33	52.4	2	0.40	74	0
1986	61.4	64	75.3	74	47.1	66	0.89	27	1
1985	63	35	78	35	48.1	48	0.08	115	1
1984	57.3	115	71.2	115	44.2	105	0.69	41	2
1983			80.2	16	48.8	27	0.42	70	4
1982			74.8	82			0.26	92	7
1981	59.8	90	73.7	94	45.8	85	0.90	23	0
1980	61.6	61	75.4	72	47.8	54	1.76	4	0
1979	62.5	45	76.1	63	49.1	25	0.29	90	1
1978	58.3	110	71.5	113	45.7	87	0.43	69	3
1977	56.1	119	67.6	124	44.7	100	0.42	70	1
1975	60.2	83	76.7	57	43.6	114	0.09	114	0
1974	58.1	113	72.7	103	43.5	117	0.32	86	0
1973	63.7	27	79.7	19	47.7	55	0.48	64	0
1972	64.2	19	79.8	17	48.5	34	1.08	14	0
1971	63.1	33	77.7	41	48.6	31	1.13	13	0
1970	61.1	69	76.5	61	45.7	87	0.17	103	0
1969	64.1	21	78.8	27	49.4	22	0.46	68	0
1968	62.8	39	75.7	69	50	15	0.13	109	0
1967	61.9	57	76.1	63	47.6	57	0.70	39	0
1966	64.3	17	79.5	22	48.5	34	0.12	112	1
1965	61	71	74.8	82	47.2	62	0.38	76	0
1964	61.4	64	74.6	86	48.2	44	0.02	121	0
1963	62.5	45	76.4	62	48.5	34	0.65	42	0
1962	58.7	106	69.8	120	47.7	55	2.29	1	0
1961	62.5	45	75.5	71	49.5	21	0.89	27	0
1960	60.1	85	72	109	48.2	44	0.81	33	0
1959	58.5	107	71.4	114	45.7	87	0.34	83	0
1958	67.5	1	83.1	3	51.8	5	0.79	34	0
1957	64.7	13	77	53	52.3	3	0.82	30	0
1956	64.4	16	78.5	28	50.2	13	1.16	11	0
1955	57.9	114	71.7	112	44.1	106	0.56	54	1
1954	62	53	77.6	46	46.3	78	0.17	103	0
1953	59.4	97	73	99	45.7	87	0.35	82	0
1952	63.5	29	78	35	49	26	0.41	72	0
1951	62.2	50	77.6	46	46.9	72	0.25	96	0
1950			75.2	77			0.26	92	5
1949	65.1	9	80.3	12	49.8	17	0.20	101	0
1948	59.1	101	70.1	119	48.1	48	2.05	3	0
1947	67.4	2	83.2	2	51.5	7	0.41	72	0
1946	62.4	49	78.1	33	46.7	74	0.17	103	0
1945	62.9	37	76.7	57	49.2	24	2.14	2	1
1944	62.8	39	78.5	28	47	71	0.53	59	0
1943	59.4	97	73	99	45.9	84	0.40	74	0
1942	60.9	74	74.9	81	46.8	73	1.06	16	0
1941	62	53	75.3	74	48.8	27	0.63	44	0
1940	64.9	11	81.7	5	48	51	0.34	83	0
1939	65	10	81.4	7	48.7	30			0
1938	62.9	37	79.6	20	46.2	79	0.12	112	1
1937	61.8	58	77.1	52	46.6	75			0
1936	64.1	21	77	53	51.1	9	0.26	92	0
1935	60.7	78	76.7	57	44.6	101			0
1934					51.3	8	0.14	108	7
1933							0.95	21	9
1932	59.8	90	72.5	105	47.1	66	0.61	48	0
1931	64.3	17	80.3	12	48.4	41	0.02	121	0
1930	60.1	85	73	99	47.2	62	0.74	38	0
1929	61.2	68	76.1	63	46.2	79	0.34	83	1
1928	64.9	11	81.5	6	48.3	43	0.06	116	0
1927	58.2	112	70.9	116	45.5	93	0.56	54	0
1926			73.8	93			0.15	107	8
1925	62.7	42	76.7	57	48.6	31	0.54	57	1
1924	65.8	6	83.5	1	48.2	44	trace	123	0
1923	61	71	74.8	82	47.1	66	0.32	86	0
1922	58.8	105	73.9	92	43.6	114	0.05	118	0
1921	62.5	45	77.7	41	47.2	62	0.37	79	1
1920	58.3	110	75.7	69	40.9	121	trace	123	0
1919	61	71	77.7	41	44.3	103	0.24	98	1
1918	59	102	74	91	44	108	0.61	48	0
1917			72.4	107			0.75	37	6
1916	58.9	104	72.5	105	45.2	97	0.25	96	0
1915	59	102	68.4	123	49.6	19	1.27	10	0
1914	63.1	33	77.8	39	48.5	34	0.49	62	1
1913	61.6	61	77	53	46.2	79	0.38	76	0
1912	63.8	26	80.3	12	47.3	60	0.82	30	0
1911	59.5	95	75.1	78	44	108	0.65	42	0
1910	62.6	44	81.1	9	44.1	106	0.26	92	0
1909	60.1	85	75.3	74	44.8	99	0.37	79	0
1908	59.8	90	74.2	89	45.3	96	0.13	109	1
1906	62.2	50	75.9	67	48.5	34	0.93	22	2
1905	59.8	90	73.2	97	46.4	77	0.88	29	0
1904	61.1	69	78.2	31	43.9	110	0.13	109	0
1899	59.2	99	73.1	98	45.4	94	0.30	89	0
1898	63.4	30	79.5	22	47.2	62	0.37	79	0
1897	64.5	14	80.7	11	48.4	41	0.55	56	0
1896	59.5	95	73.5	95	45.4	94	0.53	59	0
1895	62.1	52	74.2	89	51	10	0.54	57	3
1894							0.21	100	4

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1958	67.5
1947	67.4
2023	67.2
2018	66.1
1993	66.1
1924	65.8
2019	65.6
1987	65.3
1949	65.1
1939	65

Coldest
Year	Mean, °F
1977	56.1
2011	56.7
2010	56.8
1999	57
1984	57.3
1955	57.9
1974	58.1
1927	58.2
1978	58.3
1920	58.3

Wettest
Year	Precipitation, in
1962	2.29
1945	2.14
1948	2.05
1980	1.76
1994	1.61
2016	1.52
2011	1.40
1991	1.39
2015	1.28
1915	1.27

Driest
Year	Precipitation, in
1924	trace
1920	trace
1964	0.02
1931	0.02
2023	0.03
1992	0.03
1922	0.05
2026	0.06
1928	0.06
1985	0.08

The hottest, coldest and wettest days

Hottest day: 90°F; 28 May 2026, 24 May 2026, 12 May 2026, 2 May 2026
Coldest night: 37°F; 18 May 2026
Wettest day: 0.04 in; 13 May 2026

Every month, season and year

Months

Seasons

Years

Tri-Cities, WA the day's answers

All-time records

Every answer in words

May 2026 brought 0.06 in of precipitation in Tri-Cities, WA, the driest May since 2023, tied 8th driest of 124 (with 1928).
The hottest day of May 2026 in Tri-Cities, WA: 90°F on Thursday 28 May 2026, Sunday 24 May 2026, Tuesday 12 May 2026 and 1 other day.
The coldest night of May 2026 in Tri-Cities, WA: a low of 37°F on Monday 18 May 2026.
The wettest day of May 2026 in Tri-Cities, WA: 0.04 in on Wednesday 13 May 2026.