Forest Grove Threshold Days by Year (USC00352997)

18 fixed thresholds counted per year at Forest Grove (USC00352997): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Forest Grove Thresholds

Forest Grove: days with a maximum temperature at or above 30 C (86 F) in 114 years, most in 1967 with 74.
Forest Grove: days with a maximum temperature at or above 90 F (32.2 C) in 113 years, most in 1967 with 42.
Forest Grove: nights with a minimum temperature at or below 0 C (32 F) in 110 years, most in 1929 with 104.
Forest Grove: days with a maximum temperature at or above 35 C (95 F) in 107 years, most in 1967 with 20.
18 fixed thresholds have at least one qualifying day at Forest Grove.

Days at or above 30 C (86 F)

114 years with a qualifying day

Days per year at Forest Grove with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 74 in 1967.

Days at or above 30 C (86 F) per year at Forest Grove
Year	Days	Decade average
1903	16	30.5
1904	49	30.5
1906	43	30.5
1909	14	30.5
1911	30	40.5
1917	50	40.5
1918	49	40.5
1919	33	40.5
1920	33	33.6
1921	14	33.6
1922	42	33.6
1923	36	33.6
1924	35	33.6
1925	37	33.6
1926	47	33.6
1927	29	33.6
1928	28	33.6
1929	35	33.6
1930	24	35.4
1931	41	35.4
1932	38	35.4
1933	29	35.4
1934	32	35.4
1935	44	35.4
1936	29	35.4
1937	30	35.4
1938	51	35.4
1939	36	35.4
1940	35	29.6
1941	29	29.6
1942	30	29.6
1943	25	29.6
1944	31	29.6
1945	38	29.6
1946	31	29.6
1947	24	29.6
1948	22	29.6
1949	31	29.6
1950	36	31
1951	42	31
1952	44	31
1953	19	31
1954	6	31
1955	22	31
1956	32	31
1957	21	31
1958	58	31
1959	30	31
1960	29	37.8
1961	52	37.8
1962	31	37.8
1963	26	37.8
1964	19	37.8
1965	38	37.8
1966	36	37.8
1967	74	37.8
1968	32	37.8
1969	41	37.8
1970	54	36.9
1971	39	36.9
1972	48	36.9
1973	42	36.9
1974	50	36.9
1975	46	36.9
1976	18	36.9
1977	28	36.9
1978	24	36.9
1979	20	36.9
1980	16	28.3
1981	34	28.3
1982	24	28.3
1983	12	28.3
1984	20	28.3
1985	36	28.3
1986	43	28.3
1988	43	28.3
1989	27	28.3
1990	31	47.3
1991	49	47.3
1992	63	47.3
1993	38	47.3
1994	62	47.3
1995	56	47.3
1996	39	47.3
1997	36	47.3
1998	52	47.3
1999	47	47.3
2000	18	35.6
2001	40	35.6
2002	44	35.6
2003	46	35.6
2004	46	35.6
2005	37	35.6
2006	42	35.6
2007	23	35.6
2008	25	35.6
2009	35	35.6
2010	21	29.3
2011	18	29.3
2012	25	29.3
2013	16	29.3
2014	38	29.3
2015	42	29.3
2016	31	29.3
2017	42	29.3
2018	44	29.3
2019	16	29.3
2020	30	38.9
2021	41	38.9
2022	48	38.9
2023	43	38.9
2024	39	38.9
2025	42	38.9
2026	29	38.9

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

First to last qualifying date each year at Forest Grove
Year	First date	Last date
1903	1903-06-06	1903-09-03
1904	1904-04-12	1904-10-01
1906	1906-04-20	1906-09-20
1909	1909-06-09	1909-09-15
1911	1911-07-11	1911-09-01
1917	1917-06-13	1917-10-04
1918	1918-06-04	1918-09-28
1919	1919-07-04	1919-09-24
1920	1920-06-03	1920-09-02
1921	1921-07-07	1921-08-11
1922	1922-05-15	1922-09-18
1923	1923-05-07	1923-10-01
1924	1924-05-10	1924-09-12
1925	1925-05-05	1925-09-23
1926	1926-04-14	1926-09-05
1927	1927-05-14	1927-09-18
1928	1928-05-19	1928-09-22
1929	1929-06-23	1929-09-16
1930	1930-06-15	1930-09-20
1931	1931-04-28	1931-09-04
1932	1932-06-09	1932-10-04
1933	1933-06-12	1933-08-27
1934	1934-04-19	1934-09-15
1935	1935-06-04	1935-10-01
1936	1936-05-12	1936-10-09
1937	1937-06-01	1937-09-15
1938	1938-05-21	1938-09-17
1939	1939-05-12	1939-09-22
1940	1940-05-21	1940-08-30
1941	1941-05-10	1941-08-20
1942	1942-06-29	1942-09-24
1943	1943-05-24	1943-09-24
1944	1944-06-09	1944-09-10
1945	1945-05-02	1945-09-13
1946	1946-05-19	1946-09-09
1947	1947-04-14	1947-09-24
1948	1948-06-02	1948-09-12
1949	1949-05-11	1949-09-28
1950	1950-06-03	1950-09-22
1951	1951-05-21	1951-09-22
1952	1952-05-27	1952-10-07
1953	1953-05-06	1953-09-15
1954	1954-05-17	1954-09-25
1955	1955-06-07	1955-09-06
1956	1956-04-20	1956-09-06
1957	1957-04-28	1957-09-23
1958	1958-05-15	1958-10-03
1959	1959-06-18	1959-09-11
1960	1960-06-06	1960-09-29
1961	1961-05-19	1961-08-29
1962	1962-06-24	1962-09-25
1963	1963-05-19	1963-09-28
1964	1964-07-11	1964-09-24
1965	1965-06-10	1965-09-25
1966	1966-05-04	1966-09-22
1967	1967-05-20	1967-09-29
1968	1968-06-24	1968-09-06
1969	1969-05-07	1969-09-12
1970	1970-05-15	1970-10-03
1971	1971-05-10	1971-08-29
1972	1972-05-27	1972-09-16
1973	1973-05-13	1973-09-29
1974	1974-06-10	1974-09-26
1975	1975-05-13	1975-10-01
1976	1976-06-18	1976-09-21
1977	1977-06-06	1977-09-13
1978	1978-06-03	1978-08-30
1979	1979-05-26	1979-09-18
1980	1980-07-08	1980-10-06
1981	1981-06-26	1981-09-17
1982	1982-06-10	1982-09-02
1983	1983-05-22	1983-08-14
1984	1984-05-29	1984-08-27
1985	1985-05-17	1985-08-27
1986	1986-05-30	1986-09-07
1988	1988-05-12	1988-10-02
1989	1989-06-03	1989-09-29
1990	1990-05-05	1990-09-23
1991	1991-06-10	1991-10-10
1992	1992-05-04	1992-09-23
1993	1993-05-18	1993-10-04
1994	1994-05-07	1994-09-28
1995	1995-05-14	1995-09-23
1996	1996-06-03	1996-09-29
1997	1997-05-11	1997-09-25
1998	1998-04-30	1998-10-01
1999	1999-05-23	1999-09-23
2000	2000-06-26	2000-09-14
2001	2001-05-22	2001-10-02
2002	2002-06-11	2002-09-25
2003	2003-05-24	2003-09-28
2004	2004-04-27	2004-09-29
2005	2005-05-26	2005-09-02
2006	2006-05-16	2006-09-29
2007	2007-05-30	2007-09-12
2008	2008-05-16	2008-09-30
2009	2009-05-29	2009-09-24
2010	2010-07-07	2010-10-02
2011	2011-06-05	2011-09-12
2012	2012-05-14	2012-09-19
2013	2013-06-29	2013-09-13
2014	2014-05-02	2014-10-07
2015	2015-06-07	2015-09-13
2016	2016-04-08	2016-09-27
2017	2017-05-23	2017-09-28
2018	2018-04-27	2018-09-28
2019	2019-05-11	2019-09-06
2020	2020-05-10	2020-09-29
2021	2021-06-01	2021-09-25
2022	2022-06-26	2022-10-17
2023	2023-05-13	2023-09-16
2024	2024-05-11	2024-09-25
2025	2025-06-01	2025-09-25
2026	2026-05-05	2026-08-27

Every Fixed Threshold

Fixed thresholds at Forest Grove
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	114	74	1967	29
35 C (95 F): Days	107	20	1967	4
40 C (104 F): Days	29	4	1981	1
45 C (113 F): Days	1	1	2021	1
90 F (32.2 C): Days	113	42	1967	19
100 F (37.8 C): Days	71	9	1996	1
110 F (43.3 C): Days	1	1	2021	1
0 C (32 F): Ice days (max	75	18	1930	1
0 C (32 F): Frost days (min	110	104	1929	27
-10 C (14 F): Days with min	58	15	1930	3
-20 C (-4 F): Days with min	4	1	1909	1
20 C (68 F): Tropical nights (min	21	2	1941	2
10 mm (0.39 in): Days with 10 mm or more rain	97	62	1996	7
25 mm (0.98 in): Days with 25 mm or more rain	97	23	1999	4
50 mm (1.97 in): Days with 50 mm or more rain	55	5	1996	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1904	1
10 cm (3.9 in): Days with 10 cm or more snowfall	39	4	1954	2
25 cm (9.8 in): Days with 25 cm or more snowfall	5	2	1919	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1903.

Download the Data

Data for Forest Grove 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).

Forest Grove Threshold Days by Year (USC00352997)

Key Facts for Forest Grove Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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