Walwa Threshold Days by Year (ASN00082052)

4 fixed thresholds counted per year at Walwa (ASN00082052): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Walwa Thresholds

Walwa: days with 10 mm (0.39 in) or more of precipitation in 103 years, most in 1956 with 50.
Walwa: days with 25 mm (0.98 in) or more of precipitation in 101 years, most in 2010 with 13.
Walwa: days with 50 mm (1.97 in) or more of precipitation in 47 years, most in 1958 with 4.
Walwa: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1910 with 1.
4 fixed thresholds have at least one qualifying day at Walwa.

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

103 years with a qualifying day

Days per year at Walwa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 50 in 1956.

Days with 10 mm (0.39 in) or more of precipitation per year at Walwa
Year	Days	Decade average
1885	25	29.4
1886	35	29.4
1887	33	29.4
1888	22	29.4
1889	32	29.4
1890	39	31
1891	38	31
1892	32	31
1893	31	31
1894	45	31
1895	27	31
1896	24	31
1897	22	31
1898	26	31
1899	26	31
1900	34	24.4
1901	21	24.4
1902	14	24.4
1903	23	24.4
1904	21	24.4
1905	29	24.4
1906	34	24.4
1907	21	24.4
1908	22	24.4
1909	25	24.4
1910	23	26.6
1911	24	26.6
1912	22	26.6
1913	24	26.6
1914	13	26.6
1915	29	26.6
1916	43	26.6
1917	46	26.6
1919	15	26.6
1924	37	26.2
1926	31	26.2
1927	20	26.2
1928	20	26.2
1929	23	26.2
1930	26	29.2
1931	34	29.2
1932	26	29.2
1933	29	29.2
1934	40	29.2
1935	31	29.2
1936	26	29.2
1937	23	29.2
1938	16	29.2
1939	41	29.2
1940	16	25.2
1941	20	25.2
1942	30	25.2
1943	25	25.2
1944	17	25.2
1945	25	25.2
1946	35	25.2
1947	36	25.2
1948	22	25.2
1949	26	25.2
1950	34	30.9
1951	25	30.9
1952	42	30.9
1953	28	30.9
1954	25	30.9
1955	36	30.9
1956	50	30.9
1957	19	30.9
1958	31	30.9
1959	19	30.9
1960	35	24
1961	20	24
1962	25	24
1964	29	24
1965	16	24
1966	29	24
1967	10	24
1968	28	24
1969	24	24
1970	29	27.2
1971	23	27.2
1972	18	27.2
1973	44	27.2
1974	38	27.2
1979	11	27.2
1982	8	21.7
1983	31	21.7
1984	26	21.7
1997	22	25
1998	25	25
1999	28	25
2000	31	21.6
2001	17	21.6
2002	18	21.6
2003	20	21.6
2004	25	21.6
2005	21	21.6
2008	16	21.6
2009	25	21.6
2010	40	26.2
2016	36	26.2
2017	23	26.2
2018	17	26.2
2019	15	26.2

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

First to last qualifying date each year at Walwa
Year	First date	Last date
1885	1885-01-25	1885-12-01
1886	1886-01-02	1886-12-20
1887	1887-01-25	1887-12-25
1888	1888-01-02	1888-12-30
1889	1889-01-02	1889-11-24
1890	1890-02-10	1890-12-30
1891	1891-01-06	1891-12-06
1892	1892-01-13	1892-12-08
1893	1893-03-05	1893-12-28
1894	1894-01-05	1894-12-23
1895	1895-01-05	1895-12-11
1896	1896-01-09	1896-11-19
1897	1897-01-09	1897-12-03
1898	1898-02-12	1898-12-23
1899	1899-02-26	1899-12-07
1900	1900-01-19	1900-12-03
1901	1901-03-10	1901-12-31
1902	1902-01-04	1902-12-19
1903	1903-03-05	1903-12-30
1904	1904-01-02	1904-12-16
1905	1905-01-16	1905-12-31
1906	1906-02-28	1906-12-18
1907	1907-01-26	1907-12-28
1908	1908-02-01	1908-12-03
1909	1909-01-20	1909-10-18
1910	1910-01-12	1910-12-22
1911	1911-01-06	1911-12-26
1912	1912-02-27	1912-12-27
1913	1913-01-03	1913-12-31
1914	1914-01-26	1914-12-28
1915	1915-01-31	1915-12-15
1916	1916-01-08	1916-12-25
1917	1917-01-02	1917-12-13
1919	1919-02-18	1919-10-15
1924	1924-01-03	1924-12-19
1926	1926-03-22	1926-12-27
1927	1927-01-06	1927-12-10
1928	1928-01-20	1928-12-23
1929	1929-02-15	1929-12-28
1930	1930-02-14	1930-12-25
1931	1931-01-02	1931-11-17
1932	1932-02-06	1932-11-22
1933	1933-01-24	1933-12-15
1934	1934-01-06	1934-12-01
1935	1935-01-14	1935-12-26
1936	1936-01-05	1936-12-18
1937	1937-01-19	1937-12-29
1938	1938-01-04	1938-10-31
1939	1939-02-17	1939-11-21
1940	1940-02-17	1940-12-28
1941	1941-01-03	1941-12-06
1942	1942-02-14	1942-12-12
1943	1943-01-04	1943-11-20
1944	1944-01-10	1944-12-13
1945	1945-01-12	1945-12-18
1946	1946-01-17	1946-12-30
1947	1947-02-19	1947-12-25
1948	1948-01-02	1948-12-30
1949	1949-01-26	1949-12-20
1950	1950-01-19	1950-12-22
1951	1951-01-08	1951-11-27
1952	1952-03-20	1952-12-28
1953	1953-01-06	1953-12-07
1954	1954-01-19	1954-12-04
1955	1955-01-29	1955-12-28
1956	1956-01-03	1956-12-14
1957	1957-02-08	1957-12-31
1958	1958-01-28	1958-12-01
1959	1959-02-14	1959-11-30
1960	1960-01-05	1960-12-05
1961	1961-01-03	1961-12-15
1962	1962-01-18	1962-12-19
1964	1964-03-07	1964-12-23
1965	1965-04-23	1965-12-25
1966	1966-01-30	1966-12-15
1967	1967-01-29	1967-10-11
1968	1968-01-20	1968-12-24
1969	1969-01-23	1969-12-12
1970	1970-01-02	1970-12-08
1971	1971-01-25	1971-12-31
1972	1972-01-18	1972-11-25
1973	1973-01-13	1973-12-31
1974	1974-01-04	1974-10-25
1979	1979-04-18	1979-10-23
1982	1982-03-08	1982-12-09
1983	1983-02-11	1983-12-06
1984	1984-01-01	1984-11-14
1997	1997-01-07	1997-12-14
1998	1998-02-08	1998-12-14
1999	1999-01-09	1999-12-28
2000	2000-01-11	2000-11-13
2001	2001-01-27	2001-12-07
2002	2002-01-22	2002-09-17
2003	2003-03-01	2003-12-22
2004	2004-01-17	2004-12-14
2005	2005-01-20	2005-12-03
2008	2008-02-04	2008-12-18
2009	2009-03-13	2009-12-25
2010	2010-01-02	2010-12-20
2016	2016-01-05	2016-12-31
2017	2017-01-14	2017-12-30
2018	2018-01-09	2018-12-14
2019	2019-03-06	2019-12-02

Every Fixed Threshold

Fixed thresholds at Walwa
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	103	50	1956	15
25 mm (0.98 in): Days with 25 mm or more rain	101	13	2010	2
50 mm (1.97 in): Days with 50 mm or more rain	47	4	1958	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1910	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1885.

Download the Data

Data for Walwa 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).

Walwa Threshold Days by Year (ASN00082052)

Key Facts for Walwa Thresholds

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

Every Fixed Threshold

Download the Data

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