Umatilla Threshold Days by Year (USC00358734)

18 fixed thresholds counted per year at Umatilla (USC00358734): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Umatilla Thresholds

Umatilla: days with 10 mm (0.39 in) or more of precipitation in 60 years, most in 1964 with 11.
Umatilla: days with a maximum temperature at or above 30 C (86 F) in 58 years, most in 1918 with 99.
Umatilla: days with a maximum temperature at or above 35 C (95 F) in 58 years, most in 1920 with 55.
Umatilla: days with a maximum temperature at or above 90 F (32.2 C) in 58 years, most in 1931 with 81.
18 fixed thresholds have at least one qualifying day at Umatilla.

Days at or above 30 C (86 F)

58 years with a qualifying day

Days per year at Umatilla with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 1918.

Days at or above 30 C (86 F) per year at Umatilla
Year	Days	Decade average
1903	66	72.8
1904	77	72.8
1905	86	72.8
1907	53	72.8
1908	82	72.8
1910	66	76.4
1911	74	76.4
1912	53	76.4
1913	71	76.4
1914	96	76.4
1915	90	76.4
1916	42	76.4
1917	89	76.4
1918	99	76.4
1919	84	76.4
1920	72	83.2
1921	79	83.2
1922	96	83.2
1923	84	83.2
1924	96	83.2
1925	81	83.2
1926	87	83.2
1927	66	83.2
1928	88	83.2
1931	98	79.4
1932	66	79.4
1933	68	79.4
1934	87	79.4
1935	68	79.4
1936	80	79.4
1937	77	79.4
1938	92	79.4
1939	79	79.4
1940	90	63.1
1941	60	63.1
1942	63	63.1
1943	56	63.1
1944	74	63.1
1945	76	63.1
1946	58	63.1
1947	64	63.1
1948	41	63.1
1949	49	63.1
1950	72	65.5
1951	83	65.5
1952	78	65.5
1953	59	65.5
1954	47	65.5
1955	59	65.5
1956	71	65.5
1957	44	65.5
1958	87	65.5
1959	55	65.5
1960	72	62
1961	78	62
1962	60	62
1963	59	62
1964	41	62

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

First to last qualifying date each year at Umatilla
Year	First date	Last date
1903	1903-05-04	1903-09-04
1904	1904-04-10	1904-10-02
1905	1905-04-23	1905-09-27
1907	1907-05-09	1907-10-05
1908	1908-05-05	1908-09-30
1910	1910-04-18	1910-08-21
1911	1911-04-24	1911-10-08
1912	1912-05-08	1912-09-13
1913	1913-04-11	1913-09-27
1914	1914-05-01	1914-09-24
1915	1915-04-17	1915-09-18
1916	1916-06-12	1916-09-18
1917	1917-05-08	1917-09-20
1918	1918-05-01	1918-09-29
1919	1919-05-18	1919-09-25
1920	1920-05-07	1920-09-17
1921	1921-05-13	1921-09-17
1922	1922-05-13	1922-09-20
1923	1923-04-16	1923-09-15
1924	1924-05-08	1924-09-16
1925	1925-04-09	1925-09-23
1926	1926-04-14	1926-09-06
1927	1927-04-24	1927-09-05
1928	1928-05-05	1928-09-24
1931	1931-04-27	1931-10-01
1932	1932-04-13	1932-09-16
1933	1933-04-22	1933-10-07
1934	1934-03-14	1934-09-17
1935	1935-05-20	1935-09-21
1936	1936-04-12	1936-09-24
1937	1937-05-02	1937-09-18
1938	1938-05-21	1938-09-27
1939	1939-04-18	1939-09-22
1940	1940-05-09	1940-10-18
1941	1941-05-10	1941-08-23
1942	1942-04-20	1942-09-26
1943	1943-05-24	1943-10-07
1944	1944-05-04	1944-09-26
1945	1945-05-02	1945-09-14
1946	1946-04-25	1946-09-11
1947	1947-04-14	1947-09-24
1948	1948-05-26	1948-09-14
1949	1949-04-18	1949-09-28
1950	1950-05-12	1950-09-23
1951	1951-04-14	1951-10-09
1952	1952-04-19	1952-09-30
1953	1953-05-06	1953-09-20
1954	1954-05-17	1954-09-27
1955	1955-05-20	1955-09-11
1956	1956-04-21	1956-09-26
1957	1957-04-30	1957-09-25
1958	1958-05-17	1958-09-11
1959	1959-05-14	1959-09-14
1960	1960-05-11	1960-09-19
1961	1961-05-20	1961-09-05
1962	1962-06-09	1962-09-26
1963	1963-05-19	1963-09-12
1964	1964-05-31	1964-08-25

Every Fixed Threshold

Fixed thresholds at Umatilla
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	58	99	1918	41
35 C (95 F): Days	58	55	1920	10
40 C (104 F): Days	45	18	1915	1
45 C (113 F): Days	8	3	1905	1
90 F (32.2 C): Days	58	81	1931	28
100 F (37.8 C): Days	56	33	1931	3
110 F (43.3 C): Days	17	4	1905	1
0 C (32 F): Ice days (max	55	41	1916	8
0 C (32 F): Frost days (min	57	136	1951	100
-10 C (14 F): Days with min	51	32	1949	5
-20 C (-4 F): Days with min	21	8	1950	3
-30 C (-22 F): Days with min	1	2	1957	2
20 C (68 F): Tropical nights (min	45	15	1905	1
25 C (77 F): Days with min	6	2	1913	1
10 mm (0.39 in): Days with 10 mm or more rain	60	11	1964	11
25 mm (0.98 in): Days with 25 mm or more rain	8	2	1957	2
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1957	1
10 cm (3.9 in): Days with 10 cm or more snowfall	13	3	1950	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 Umatilla 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).

Umatilla Threshold Days by Year (USC00358734)

Key Facts for Umatilla Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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