Cascadia Threshold Days by Year (USC00351433)

15 fixed thresholds counted per year at Cascadia (USC00351433): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cascadia Thresholds

Cascadia: days with 10 mm (0.39 in) or more of precipitation in 85 years, most in 1996 with 89.
Cascadia: days with 25 mm (0.98 in) or more of precipitation in 84 years, most in 1996 with 24.
Cascadia: days with a maximum temperature at or above 30 C (86 F) in 71 years, most in 1923 with 61.
Cascadia: days with a maximum temperature at or above 90 F (32.2 C) in 71 years, most in 1923 with 32.
15 fixed thresholds have at least one qualifying day at Cascadia.

Days at or above 30 C (86 F)

71 years with a qualifying day

Days per year at Cascadia with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 61 in 1923.

Days at or above 30 C (86 F) per year at Cascadia
Year	Days	Decade average
1919	25	25
1920	12	31
1921	11	31
1922	41	31
1923	61	31
1929	30	31
1932	24	30.9
1933	32	30.9
1934	32	30.9
1935	24	30.9
1936	34	30.9
1937	33	30.9
1938	38	30.9
1939	30	30.9
1940	36	32
1942	34	32
1943	29	32
1944	40	32
1945	36	32
1946	30	32
1947	19	32
1950	36	41.5
1951	55	41.5
1952	50	41.5
1953	25	41.5
1961	47	21.7
1962	25	21.7
1963	20	21.7
1966	15	21.7
1967	29	21.7
1968	9	21.7
1969	7	21.7
1970	17	17.3
1971	8	17.3
1972	24	17.3
1973	16	17.3
1974	30	17.3
1976	9	17.3
1977	19	17.3
1978	17	17.3
1979	16	17.3
1980	14	18.8
1981	26	18.8
1982	12	18.8
1983	6	18.8
1984	14	18.8
1985	29	18.8
1986	22	18.8
1987	32	18.8
1988	22	18.8
1989	11	18.8
1990	23	21.4
1991	23	21.4
1992	30	21.4
1993	14	21.4
1994	16	21.4
1995	19	21.4
1996	27	21.4
1997	17	21.4
1998	27	21.4
1999	18	21.4
2000	19	18.9
2001	10	18.9
2002	18	18.9
2003	32	18.9
2004	18	18.9
2006	24	18.9
2007	10	18.9
2008	20	18.9
2010	14	10.5
2011	7	10.5

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

First to last qualifying date each year at Cascadia
Year	First date	Last date
1919	1919-07-08	1919-09-23
1920	1920-07-07	1920-09-01
1921	1921-07-07	1921-08-26
1922	1922-05-16	1922-09-18
1923	1923-04-14	1923-09-30
1929	1929-06-24	1929-09-16
1932	1932-06-09	1932-10-04
1933	1933-07-11	1933-08-26
1934	1934-04-19	1934-09-03
1935	1935-06-04	1935-09-08
1936	1936-05-13	1936-10-10
1937	1937-06-01	1937-09-14
1938	1938-05-23	1938-09-18
1939	1939-05-12	1939-09-21
1940	1940-05-09	1940-09-23
1942	1942-06-30	1942-09-24
1943	1943-05-25	1943-09-25
1944	1944-05-04	1944-09-27
1945	1945-06-17	1945-10-02
1946	1946-05-03	1946-09-24
1947	1947-04-14	1947-09-25
1950	1950-05-26	1950-09-23
1951	1951-05-22	1951-09-22
1952	1952-05-17	1952-10-15
1953	1953-05-05	1953-09-15
1961	1961-05-19	1961-09-14
1962	1962-07-21	1962-09-18
1963	1963-05-19	1963-09-27
1966	1966-06-16	1966-09-22
1967	1967-06-19	1967-09-28
1968	1968-06-26	1968-09-07
1969	1969-05-08	1969-08-24
1970	1970-06-01	1970-09-27
1971	1971-05-12	1971-08-19
1972	1972-05-29	1972-09-04
1973	1973-05-14	1973-09-11
1974	1974-07-27	1974-09-26
1976	1976-07-17	1976-10-08
1977	1977-07-25	1977-08-18
1978	1978-06-05	1978-08-10
1979	1979-06-03	1979-10-04
1980	1980-07-22	1980-10-06
1981	1981-04-30	1981-09-17
1982	1982-06-19	1982-09-03
1983	1983-05-25	1983-09-22
1984	1984-07-05	1984-09-18
1985	1985-06-18	1985-09-27
1986	1986-05-31	1986-09-07
1987	1987-04-27	1987-10-07
1988	1988-05-12	1988-09-14
1989	1989-06-05	1989-09-24
1990	1990-05-05	1990-09-23
1991	1991-07-03	1991-10-16
1992	1992-05-04	1992-09-23
1993	1993-08-02	1993-09-27
1994	1994-07-08	1994-09-23
1995	1995-05-30	1995-09-23
1996	1996-06-03	1996-09-11
1997	1997-05-12	1997-09-25
1998	1998-07-16	1998-09-16
1999	1999-05-24	1999-09-22
2000	2000-06-26	2000-09-14
2001	2001-05-23	2001-10-02
2002	2002-06-13	2002-09-14
2003	2003-06-05	2003-09-28
2004	2004-06-17	2004-08-21
2006	2006-05-16	2006-09-03
2007	2007-07-05	2007-09-12
2008	2008-05-16	2008-09-17
2010	2010-07-08	2010-09-04
2011	2011-08-21	2011-09-24

Every Fixed Threshold

Fixed thresholds at Cascadia
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	71	61	1923	7
35 C (95 F): Days	53	13	1944	3
40 C (104 F): Days	3	2	1981	2
90 F (32.2 C): Days	71	32	1923	2
100 F (37.8 C): Days	18	4	1944	1
0 C (32 F): Ice days (max	35	10	1990	3
0 C (32 F): Frost days (min	70	139	1985	106
-10 C (14 F): Days with min	30	8	1962	2
20 C (68 F): Tropical nights (min	3	4	1933	1
10 mm (0.39 in): Days with 10 mm or more rain	85	89	1996	56
25 mm (0.98 in): Days with 25 mm or more rain	84	24	1996	12
50 mm (1.97 in): Days with 50 mm or more rain	70	5	1919	1
100 mm (3.94 in): Days with 100 mm or more rain	5	1	1921	1
10 cm (3.9 in): Days with 10 cm or more snowfall	27	8	1950	2
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1916	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1919.

Download the Data

Data for Cascadia 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Cascadia Threshold Days by Year (USC00351433)

Key Facts for Cascadia Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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