Washington Threshold Days by Year (USC00148578)

19 fixed thresholds counted per year at Washington (USC00148578): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Washington Thresholds

Washington: days with 10 mm (0.39 in) or more of precipitation in 74 years, most in 1993 with 41.
Washington: days with 25 mm (0.98 in) or more of precipitation in 74 years, most in 2007 with 17.
Washington: days with a maximum temperature at or above 30 C (86 F) in 73 years, most in 1956 with 128.
Washington: days with a maximum temperature at or above 35 C (95 F) in 73 years, most in 1956 with 66.
19 fixed thresholds have at least one qualifying day at Washington.

Days at or above 30 C (86 F)

73 years with a qualifying day

Days per year at Washington with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 128 in 1956.

Days at or above 30 C (86 F) per year at Washington
Year	Days	Decade average
1953	115	100.6
1954	110	100.6
1955	109	100.6
1956	128	100.6
1957	78	100.6
1958	77	100.6
1959	87	100.6
1960	78	86.1
1961	74	86.1
1962	94	86.1
1963	106	86.1
1964	88	86.1
1965	85	86.1
1966	93	86.1
1967	70	86.1
1968	91	86.1
1969	82	86.1
1970	104	89.2
1971	92	89.2
1972	85	89.2
1973	80	89.2
1974	73	89.2
1975	94	89.2
1976	95	89.2
1977	78	89.2
1978	95	89.2
1979	96	89.2
1980	120	86.9
1981	83	86.9
1982	70	86.9
1983	93	86.9
1984	77	86.9
1985	68	86.9
1986	74	86.9
1987	96	86.9
1988	104	86.9
1989	84	86.9
1990	86	79.7
1991	108	79.7
1992	52	79.7
1993	65	79.7
1994	80	79.7
1995	75	79.7
1996	70	79.7
1997	87	79.7
1998	97	79.7
1999	77	79.7
2000	99	78.8
2001	86	78.8
2002	85	78.8
2003	89	78.8
2004	68	78.8
2005	82	78.8
2006	80	78.8
2007	73	78.8
2008	63	78.8
2009	63	78.8
2010	92	87.1
2011	89	87.1
2012	108	87.1
2013	78	87.1
2014	83	87.1
2015	77	87.1
2016	89	87.1
2017	84	87.1
2018	96	87.1
2019	75	87.1
2021	71	76.3
2022	87	76.3
2023	74	76.3
2024	71	76.3
2025	75	76.3
2026	80	76.3

For each year, a bar from the first to the last day at Washington meeting 30 C (86 F).

First to last qualifying date each year at Washington
Year	First date	Last date
1953	1953-04-22	1953-10-18
1954	1954-04-06	1954-10-10
1955	1955-04-18	1955-10-11
1956	1956-04-01	1956-10-12
1957	1957-05-31	1957-10-01
1958	1958-05-21	1958-10-19
1959	1959-04-30	1959-09-20
1960	1960-04-22	1960-10-11
1961	1961-04-19	1961-09-10
1962	1962-04-20	1962-10-14
1963	1963-05-08	1963-10-19
1964	1964-04-16	1964-09-19
1965	1965-04-20	1965-10-10
1966	1966-05-05	1966-10-13
1967	1967-03-29	1967-10-03
1968	1968-03-30	1968-10-15
1969	1969-05-26	1969-10-04
1970	1970-04-27	1970-09-21
1971	1971-04-11	1971-10-01
1972	1972-03-11	1972-10-01
1973	1973-05-18	1973-10-08
1974	1974-04-27	1974-10-05
1975	1975-04-17	1975-10-22
1976	1976-04-14	1976-10-12
1977	1977-05-16	1977-09-17
1978	1978-03-31	1978-10-21
1979	1979-05-26	1979-10-20
1980	1980-04-20	1980-10-14
1981	1981-04-02	1981-09-30
1982	1982-04-14	1982-10-06
1983	1983-05-06	1983-10-03
1984	1984-06-05	1984-09-24
1985	1985-05-25	1985-09-19
1986	1986-03-28	1986-09-27
1987	1987-04-18	1987-10-02
1988	1988-05-12	1988-09-27
1989	1989-04-21	1989-10-15
1990	1990-04-22	1990-10-06
1991	1991-04-05	1991-10-24
1992	1992-04-14	1992-10-04
1993	1993-05-27	1993-10-07
1994	1994-04-17	1994-09-30
1995	1995-06-06	1995-10-13
1996	1996-04-11	1996-09-11
1997	1997-04-18	1997-10-06
1998	1998-05-13	1998-10-01
1999	1999-05-09	1999-10-14
2000	2000-04-05	2000-10-02
2001	2001-04-26	2001-09-13
2002	2002-04-14	2002-10-02
2003	2003-04-02	2003-10-23
2004	2004-04-16	2004-09-20
2005	2005-05-10	2005-10-19
2006	2006-04-14	2006-10-04
2007	2007-04-30	2007-10-05
2008	2008-05-17	2008-09-29
2009	2009-04-23	2009-09-28
2010	2010-04-30	2010-10-09
2011	2011-04-10	2011-10-05
2012	2012-04-01	2012-09-26
2013	2013-04-30	2013-10-05
2014	2014-04-10	2014-10-27
2015	2015-03-17	2015-10-21
2016	2016-05-07	2016-10-18
2017	2017-03-20	2017-10-03
2018	2018-04-13	2018-10-04
2019	2019-04-21	2019-10-01
2021	2021-04-27	2021-10-09
2022	2022-04-13	2022-09-25
2023	2023-05-08	2023-10-03
2024	2024-04-14	2024-10-12
2025	2025-04-18	2025-10-13
2026	2026-03-21	2026-10-13

Every Fixed Threshold

Fixed thresholds at Washington
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	73	128	1956	80
35 C (95 F): Days	73	66	1956	15
40 C (104 F): Days	34	17	1980	5
90 F (32.2 C): Days	73	103	1956	37
100 F (37.8 C): Days	66	33	1980	1
110 F (43.3 C): Days	2	2	1954	1
0 C (32 F): Ice days (max	73	57	1978	16
0 C (32 F): Frost days (min	73	163	2013	71
-10 C (14 F): Days with min	73	63	1978	23
-20 C (-4 F): Days with min	64	19	1979	5
-30 C (-22 F): Days with min	6	2	1989	2
20 C (68 F): Tropical nights (min	73	60	2000	43
25 C (77 F): Days with min	51	9	2018	4
10 mm (0.39 in): Days with 10 mm or more rain	74	41	1993	22
25 mm (0.98 in): Days with 25 mm or more rain	74	17	2007	15
50 mm (1.97 in): Days with 50 mm or more rain	60	5	1973	4
100 mm (3.94 in): Days with 100 mm or more rain	9	1	1957	1
10 cm (3.9 in): Days with 10 cm or more snowfall	51	9	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	8	1	1960	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1953.

Download the Data

Data for Washington threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Washington Threshold Days by Year (USC00148578)

Key Facts for Washington Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related