West Linn Threshold Days by Year (USC00359208)

5 fixed thresholds counted per year at West Linn (USC00359208): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for West Linn Thresholds

West Linn: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1950 with 60.
West Linn: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1953 with 15.
West Linn: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1942 with 4.
West Linn: days with 10 cm (3.9 in) or more of snowfall in 7 years, most in 1943 with 2.
5 fixed thresholds have at least one qualifying day at West Linn.

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

30 years with a qualifying day

Days per year at West Linn with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 60 in 1950.

Days with 10 mm (0.39 in) or more of precipitation per year at West Linn
Year	Days	Decade average
1939	32	32
1940	43	37.5
1941	29	37.5
1942	43	37.5
1943	34	37.5
1944	22	37.5
1945	51	37.5
1946	40	37.5
1947	28	37.5
1948	55	37.5
1949	30	37.5
1950	60	41.6
1951	45	41.6
1952	26	41.6
1953	47	41.6
1954	45	41.6
1955	46	41.6
1956	42	41.6
1957	37	41.6
1958	38	41.6
1959	30	41.6
1960	42	40.2
1961	40	40.2
1962	39	40.2
1963	35	40.2
1964	37	40.2
1965	34	40.2
1966	41	40.2
1967	38	40.2
1968	56	40.2

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

First to last qualifying date each year at West Linn
Year	First date	Last date
1939	1939-01-02	1939-12-29
1940	1940-01-01	1940-12-27
1941	1941-01-06	1941-12-20
1942	1942-01-07	1942-12-31
1943	1943-01-01	1943-12-25
1944	1944-01-01	1944-12-04
1945	1945-01-05	1945-12-29
1946	1946-01-02	1946-12-15
1947	1947-01-24	1947-12-28
1948	1948-01-01	1948-12-31
1949	1949-01-01	1949-12-31
1950	1950-01-06	1950-12-29
1951	1951-01-02	1951-12-29
1952	1952-01-04	1952-12-30
1953	1953-01-02	1953-12-20
1954	1954-01-03	1954-12-24
1955	1955-01-01	1955-12-27
1956	1956-01-01	1956-12-21
1957	1957-01-02	1957-12-26
1958	1958-01-12	1958-12-27
1959	1959-01-05	1959-12-12
1960	1960-01-08	1960-12-19
1961	1961-01-05	1961-12-24
1962	1962-01-03	1962-12-30
1963	1963-02-01	1963-12-28
1964	1964-01-02	1964-12-30
1965	1965-01-02	1965-12-31
1966	1966-01-02	1966-12-25
1967	1967-01-04	1967-12-23
1968	1968-01-09	1968-12-31

Every Fixed Threshold

Fixed thresholds at West Linn
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	30	60	1950	56
25 mm (0.98 in): Days with 25 mm or more rain	30	15	1953	12
50 mm (1.97 in): Days with 50 mm or more rain	16	4	1942	2
10 cm (3.9 in): Days with 10 cm or more snowfall	7	2	1943	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1943	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

Data for West Linn 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).

West Linn Threshold Days by Year (USC00359208)

Key Facts for West Linn Thresholds

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

Every Fixed Threshold

Download the Data

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