Days with 10 mm (0.39 in) or more of precipitation in Seattle

Seattle has had days with 10 mm (0.39 in) or more of precipitation in 79 years, most in 2014 with 47. Days per year, season span, streaks and every date.

Key Facts for Seattle

Seattle has had days with 10 mm (0.39 in) or more of precipitation in 79 years, 2,436 days in all.
The most in one year was 47 days in 2014.
In 2026, the latest year on file, there were 23 such days.
The earliest first date in a year was 1 January 1948.
The latest last date in a year was 31 December 1948.
The longest run inside a single year was 7 days in 1979.
1 year with under 90 percent of days observed is left out of these rankings.

Days per Year

79 years, 2,436 days

Days per year in Seattle with 10 mm (0.39 in) or more of precipitation. The line is the decade average. The most was 47 in 2014. Grey bars are years with under 90 percent of days observed, left out of rankings.

Days with 10 mm (0.39 in) or more of precipitation per year in Seattle
Year	Days	Decade average
1948	40	31.5
1949	23	31.5
1950	45	34.6
1951	38	34.6
1952	12	34.6
1953	46	34.6
1954	35	34.6
1955	37	34.6
1956	32	34.6
1957	29	34.6
1958	39	34.6
1959	33	34.6
1960	33	30.6
1961	36	30.6
1962	24	30.6
1963	33	30.6
1964	35	30.6
1965	26	30.6
1966	30	30.6
1967	24	30.6
1968	42	30.6
1969	23	30.6
1970	30	30
1971	37	30
1972	40	30
1973	28	30
1974	34	30
1975	32	30
1976	19	30
1977	23	30
1978	31	30
1979	26	30
1980	25	27
1981	23	27
1982	35	27
1983	38	27
1984	31	27
1985	17	27
1986	25	27
1987	21	27
1988	28	27
1989	27	27
1990	30	31.4
1991	27	31.4
1992	28	31.4
1993	24	31.4
1994	27	31.4
1995	32	31.4
1996	39	31.4
1997	40	31.4
1998	38	31.4
1999	29	31.4
2000	20	27.9
2001	31	27.9
2002	26	27.9
2003	30	27.9
2004	26	27.9
2005	34	27.9
2006	42	27.9
2007	24	27.9
2008	17	27.9
2009	29	27.9
2010	33	34
2011	29	34
2012	42	34
2013	21	34
2014	47	34
2015	34	34
2016	37	34
2017	43	34
2018	31	34
2019	23	34
2020	40	31.1
2021	39	31.1
2022	29	31.1
2023	33	31.1
2024	25	31.1
2025	29	31.1
2026	23	31.1

Season Span

earliest 1 January, latest 31 December

For each year, a bar from the first to the last day in Seattle meeting 10 mm (0.39 in). Long bars mean a long season.

First to last qualifying date each year in Seattle
Year	First date	Last date
1948	1948-01-01	1948-12-31
1949	1949-01-07	1949-12-27
1950	1950-01-06	1950-12-30
1951	1951-01-02	1951-12-21
1952	1952-01-23	1952-12-28
1953	1953-01-02	1953-12-19
1954	1954-01-02	1954-12-30
1955	1955-01-08	1955-12-26
1956	1956-01-02	1956-12-17
1957	1957-01-07	1957-12-28
1958	1958-01-10	1958-12-29
1959	1959-01-08	1959-12-24
1960	1960-01-23	1960-12-18
1961	1961-01-04	1961-12-22
1962	1962-01-02	1962-12-30
1963	1963-01-01	1963-12-31
1964	1964-01-01	1964-12-26
1965	1965-01-02	1965-12-28
1966	1966-01-05	1966-12-31
1967	1967-01-04	1967-12-21
1968	1968-01-09	1968-12-31
1969	1969-01-05	1969-12-23
1970	1970-01-13	1970-12-30
1971	1971-01-08	1971-12-25
1972	1972-01-08	1972-12-27
1973	1973-01-12	1973-12-27
1974	1974-01-12	1974-12-27
1975	1975-01-05	1975-12-26
1976	1976-01-10	1976-12-22
1977	1977-01-17	1977-12-15
1978	1978-01-03	1978-12-04
1979	1979-01-10	1979-12-21
1980	1980-01-11	1980-12-30
1981	1981-01-28	1981-12-18
1982	1982-01-15	1982-12-20
1983	1983-01-02	1983-12-29
1984	1984-01-02	1984-12-29
1985	1985-02-01	1985-12-02
1986	1986-01-01	1986-12-29
1987	1987-01-12	1987-12-09
1988	1988-01-14	1988-12-29
1989	1989-01-05	1989-12-07
1990	1990-01-05	1990-12-18
1991	1991-01-07	1991-12-05
1992	1992-01-01	1992-12-19
1993	1993-01-19	1993-12-31
1994	1994-01-22	1994-12-27
1995	1995-01-28	1995-12-29
1996	1996-01-07	1996-12-31
1997	1997-01-01	1997-12-16
1998	1998-01-01	1998-12-29
1999	1999-01-14	1999-12-15
2000	2000-01-31	2000-12-16
2001	2001-01-04	2001-12-16
2002	2002-01-01	2002-12-17
2003	2003-01-01	2003-12-24
2004	2004-01-06	2004-12-10
2005	2005-01-17	2005-12-30
2006	2006-01-05	2006-12-26
2007	2007-01-01	2007-12-27
2008	2008-01-02	2008-12-24
2009	2009-01-01	2009-12-21
2010	2010-01-01	2010-12-27
2011	2011-01-12	2011-12-28
2012	2012-01-02	2012-12-25
2013	2013-01-08	2013-12-22
2014	2014-01-07	2014-12-23
2015	2015-01-04	2015-12-21
2016	2016-01-12	2016-12-23
2017	2017-01-01	2017-12-29
2018	2018-01-05	2018-12-29
2019	2019-01-03	2019-12-21
2020	2020-01-06	2020-12-30
2021	2021-01-01	2021-12-22
2022	2022-01-02	2022-12-26
2023	2023-01-12	2023-12-25
2024	2024-01-06	2024-12-27
2025	2025-01-03	2025-12-16
2026	2026-01-03	2026-09-13

Every Year

Days with 10 mm (0.39 in) or more of precipitation per year in Seattle
Year	Days	First date	Last date	Longest streak in year	Coverage
2026	23	3 January 2026	13 September 2026	4 days	Incomplete, not ranked
2025	29	3 January 2025	16 December 2025	3 days	Complete
2024	25	6 January 2024	27 December 2024	2 days	Complete
2023	33	12 January 2023	25 December 2023	4 days	Complete
2022	29	2 January 2022	26 December 2022	3 days	Complete
2021	39	1 January 2021	22 December 2021	4 days	Complete
2020	40	6 January 2020	30 December 2020	3 days	Complete
2019	23	3 January 2019	21 December 2019	3 days	Complete
2018	31	5 January 2018	29 December 2018	4 days	Complete
2017	43	1 January 2017	29 December 2017	4 days	Complete
2016	37	12 January 2016	23 December 2016	4 days	Complete
2015	34	4 January 2015	21 December 2015	5 days	Complete
2014	47	7 January 2014	23 December 2014	4 days	Complete
2013	21	8 January 2013	22 December 2013	3 days	Complete
2012	42	2 January 2012	25 December 2012	3 days	Complete
2011	29	12 January 2011	28 December 2011	2 days	Complete
2010	33	1 January 2010	27 December 2010	4 days	Complete
2009	29	1 January 2009	21 December 2009	2 days	Complete
2008	17	2 January 2008	24 December 2008	2 days	Complete
2007	24	1 January 2007	27 December 2007	3 days	Complete
2006	42	5 January 2006	26 December 2006	6 days	Complete
2005	34	17 January 2005	30 December 2005	6 days	Complete
2004	26	6 January 2004	10 December 2004	4 days	Complete
2003	30	1 January 2003	24 December 2003	6 days	Complete
2002	26	1 January 2002	17 December 2002	3 days	Complete
2001	31	4 January 2001	16 December 2001	3 days	Complete
2000	20	31 January 2000	16 December 2000	2 days	Complete
1999	29	14 January 1999	15 December 1999	4 days	Complete
1998	38	1 January 1998	29 December 1998	3 days	Complete
1997	40	1 January 1997	16 December 1997	5 days	Complete
1996	39	7 January 1996	31 December 1996	5 days	Complete
1995	32	28 January 1995	29 December 1995	5 days	Complete
1994	27	22 January 1994	27 December 1994	3 days	Complete
1993	24	19 January 1993	31 December 1993	3 days	Complete
1992	28	1 January 1992	19 December 1992	5 days	Complete
1991	27	7 January 1991	5 December 1991	3 days	Complete
1990	30	5 January 1990	18 December 1990	5 days	Complete
1989	27	5 January 1989	7 December 1989	3 days	Complete
1988	28	14 January 1988	29 December 1988	3 days	Complete
1987	21	12 January 1987	9 December 1987	3 days	Complete
1986	25	1 January 1986	29 December 1986	2 days	Complete
1985	17	1 February 1985	2 December 1985	2 days	Complete
1984	31	2 January 1984	29 December 1984	3 days	Complete
1983	38	2 January 1983	29 December 1983	4 days	Complete
1982	35	15 January 1982	20 December 1982	7 days	Complete
1981	23	28 January 1981	18 December 1981	5 days	Complete
1980	25	11 January 1980	30 December 1980	4 days	Complete
1979	26	10 January 1979	21 December 1979	7 days	Complete
1978	31	3 January 1978	4 December 1978	2 days	Complete
1977	23	17 January 1977	15 December 1977	4 days	Complete
1976	19	10 January 1976	22 December 1976	2 days	Complete
1975	32	5 January 1975	26 December 1975	3 days	Complete
1974	34	12 January 1974	27 December 1974	5 days	Complete
1973	28	12 January 1973	27 December 1973	3 days	Complete
1972	40	8 January 1972	27 December 1972	3 days	Complete
1971	37	8 January 1971	25 December 1971	2 days	Complete
1970	30	13 January 1970	30 December 1970	3 days	Complete
1969	23	5 January 1969	23 December 1969	3 days	Complete
1968	42	9 January 1968	31 December 1968	3 days	Complete
1967	24	4 January 1967	21 December 1967	3 days	Complete
1966	30	5 January 1966	31 December 1966	3 days	Complete
1965	26	2 January 1965	28 December 1965	2 days	Complete
1964	35	1 January 1964	26 December 1964	4 days	Complete
1963	33	1 January 1963	31 December 1963	4 days	Complete
1962	24	2 January 1962	30 December 1962	4 days	Complete
1961	36	4 January 1961	22 December 1961	3 days	Complete
1960	33	23 January 1960	18 December 1960	3 days	Complete
1959	33	8 January 1959	24 December 1959	3 days	Complete
1958	39	10 January 1958	29 December 1958	4 days	Complete
1957	29	7 January 1957	28 December 1957	4 days	Complete
1956	32	2 January 1956	17 December 1956	3 days	Complete
1955	37	8 January 1955	26 December 1955	3 days	Complete
1954	35	2 January 1954	30 December 1954	5 days	Complete
1953	46	2 January 1953	19 December 1953	4 days	Complete
1952	12	23 January 1952	28 December 1952	3 days	Complete
1951	38	2 January 1951	21 December 1951	4 days	Complete
1950	45	6 January 1950	30 December 1950	4 days	Complete
1949	23	7 January 1949	27 December 1949	2 days	Complete
1948	40	1 January 1948	31 December 1948	3 days	Complete

Decade averages for Days with 10 mm (0.39 in) or more of precipitation in Seattle
Decade	Average days per year	Years counted
1940s	31.5	2
1950s	34.6	10
1960s	30.6	10
1970s	30.0	10
1980s	27.0	10
1990s	31.4	10
2000s	27.9	10
2010s	34.0	10
2020s	32.5	6

Compare with your own threshold in the threshold explorer. Fahrenheit thresholds are converted to tenths of a degree Celsius once, rounding half up.

Download the Data

Data for Days with 10 mm (0.39 in) or more of precipitation in Seattle, 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 from the threaded city record.

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