Wilsonville Threshold Days by Year (USC00259325)

6 fixed thresholds counted per year at Wilsonville (USC00259325): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wilsonville Thresholds

Wilsonville: days with 10 mm (0.39 in) or more of precipitation in 93 years, most in 1965 with 32.
Wilsonville: days with 25 mm (0.98 in) or more of precipitation in 93 years, most in 1996 with 12.
Wilsonville: days with 50 mm (1.97 in) or more of precipitation in 60 years, most in 1996 with 6.
Wilsonville: days with 10 cm (3.9 in) or more of snowfall in 48 years, most in 1984 with 6.
6 fixed thresholds have at least one qualifying day at Wilsonville.

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

93 years with a qualifying day

Days per year at Wilsonville with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 32 in 1965.

Days with 10 mm (0.39 in) or more of precipitation per year at Wilsonville
Year	Days	Decade average
1896	18	17.5
1897	19	17.5
1898	21	17.5
1899	12	17.5
1900	14	17
1901	16	17
1904	21	17
1928	20	18
1929	16	18
1930	25	15.8
1931	20	15.8
1932	12	15.8
1933	16	15.8
1934	15	15.8
1935	15	15.8
1936	9	15.8
1939	14	15.8
1941	19	16.9
1942	20	16.9
1943	11	16.9
1944	21	16.9
1945	17	16.9
1948	15	16.9
1949	15	16.9
1950	17	15.7
1955	12	15.7
1956	11	15.7
1957	21	15.7
1958	18	15.7
1959	15	15.7
1960	13	20.7
1961	18	20.7
1962	25	20.7
1963	20	20.7
1964	18	20.7
1965	32	20.7
1966	18	20.7
1967	24	20.7
1968	18	20.7
1969	21	20.7
1970	15	17.9
1971	25	17.9
1972	16	17.9
1973	22	17.9
1974	13	17.9
1975	18	17.9
1976	13	17.9
1977	21	17.9
1981	22	18.4
1982	22	18.4
1983	22	18.4
1984	18	18.4
1985	13	18.4
1986	16	18.4
1987	29	18.4
1988	12	18.4
1989	12	18.4
1990	15	19.9
1991	19	19.9
1992	18	19.9
1993	28	19.9
1994	22	19.9
1995	16	19.9
1996	29	19.9
1997	15	19.9
1998	14	19.9
1999	23	19.9
2000	17	19.7
2001	19	19.7
2002	11	19.7
2004	17	19.7
2005	16	19.7
2006	25	19.7
2007	19	19.7
2008	23	19.7
2009	30	19.7
2010	19	19.2
2011	21	19.2
2012	11	19.2
2013	13	19.2
2014	22	19.2
2015	23	19.2
2016	17	19.2
2017	21	19.2
2018	27	19.2
2019	18	19.2
2020	18	17.9
2021	18	17.9
2022	9	17.9
2023	20	17.9
2024	25	17.9
2025	18	17.9
2026	17	17.9

For each year, a bar from the first to the last day at Wilsonville meeting 10 mm (0.39 in).

First to last qualifying date each year at Wilsonville
Year	First date	Last date
1896	1896-04-11	1896-10-28
1897	1897-02-21	1897-12-19
1898	1898-04-03	1898-09-11
1899	1899-04-05	1899-11-20
1900	1900-02-27	1900-09-10
1901	1901-03-23	1901-11-02
1904	1904-04-05	1904-10-18
1928	1928-02-06	1928-11-28
1929	1929-04-14	1929-11-09
1930	1930-04-17	1930-11-19
1931	1931-02-21	1931-11-21
1932	1932-02-15	1932-09-26
1933	1933-04-20	1933-12-01
1934	1934-04-15	1934-11-27
1935	1935-04-06	1935-11-27
1936	1936-04-26	1936-09-29
1939	1939-03-11	1939-12-25
1941	1941-03-06	1941-12-26
1942	1942-03-25	1942-12-26
1943	1943-04-07	1943-09-03
1944	1944-01-26	1944-11-26
1945	1945-04-02	1945-12-25
1948	1948-03-02	1948-11-18
1949	1949-03-26	1949-10-10
1950	1950-01-25	1950-08-29
1955	1955-04-13	1955-09-26
1956	1956-04-03	1956-10-30
1957	1957-03-24	1957-10-23
1958	1958-02-26	1958-11-18
1959	1959-03-26	1959-10-31
1960	1960-01-14	1960-10-19
1961	1961-03-06	1961-11-16
1962	1962-03-24	1962-12-20
1963	1963-01-05	1963-09-22
1964	1964-02-15	1964-09-16
1965	1965-01-23	1965-10-19
1966	1966-01-16	1966-10-15
1967	1967-04-13	1967-11-02
1968	1968-04-03	1968-12-22
1969	1969-02-14	1969-10-30
1970	1970-03-18	1970-11-09
1971	1971-01-03	1971-11-16
1972	1972-03-24	1972-11-13
1973	1973-01-27	1973-12-25
1974	1974-04-13	1974-10-31
1975	1975-02-11	1975-11-20
1976	1976-04-08	1976-10-07
1977	1977-03-11	1977-09-12
1981	1981-03-04	1981-12-01
1982	1982-03-19	1982-12-28
1983	1983-02-20	1983-12-21
1984	1984-02-18	1984-12-14
1985	1985-03-23	1985-10-18
1986	1986-03-18	1986-10-11
1987	1987-02-27	1987-11-25
1988	1988-01-19	1988-09-15
1989	1989-05-17	1989-09-13
1990	1990-01-20	1990-11-03
1991	1991-04-22	1991-12-12
1992	1992-01-01	1992-11-25
1993	1993-01-09	1993-11-15
1994	1994-01-27	1994-12-31
1995	1995-03-26	1995-10-23
1996	1996-03-30	1996-11-16
1997	1997-02-24	1997-11-29
1998	1998-02-10	1998-11-09
1999	1999-04-05	1999-08-29
2000	2000-02-18	2000-11-12
2001	2001-01-14	2001-11-24
2002	2002-05-11	2002-10-30
2004	2004-03-01	2004-11-18
2005	2005-03-21	2005-11-28
2006	2006-03-09	2006-12-31
2007	2007-03-29	2007-12-11
2008	2008-04-11	2008-12-19
2009	2009-02-14	2009-12-24
2010	2010-03-06	2010-09-15
2011	2011-01-10	2011-12-04
2012	2012-02-04	2012-12-20
2013	2013-02-21	2013-11-06
2014	2014-04-04	2014-12-15
2015	2015-02-01	2015-12-16
2016	2016-02-02	2016-09-04
2017	2017-01-16	2017-10-07
2018	2018-01-22	2018-12-28
2019	2019-03-13	2019-12-29
2020	2020-02-25	2020-09-09
2021	2021-01-26	2021-10-13
2022	2022-01-06	2022-09-10
2023	2023-01-18	2023-09-22
2024	2024-01-09	2024-11-19
2025	2025-05-29	2025-11-21
2026	2026-04-27	2026-10-01

Every Fixed Threshold

Fixed thresholds at Wilsonville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	93	32	1965	17
25 mm (0.98 in): Days with 25 mm or more rain	93	12	1996	5
50 mm (1.97 in): Days with 50 mm or more rain	60	6	1996	2
100 mm (3.94 in): Days with 100 mm or more rain	5	1	1930	1
10 cm (3.9 in): Days with 10 cm or more snowfall	48	6	1984	2
25 cm (9.8 in): Days with 25 cm or more snowfall	11	3	1987	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

Data for Wilsonville 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).

Wilsonville Threshold Days by Year (USC00259325)

Key Facts for Wilsonville Thresholds

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

Every Fixed Threshold

Download the Data

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