Hermiston 1 SE Threshold Days by Year (USC00353847)

19 fixed thresholds counted per year at Hermiston 1 SE (USC00353847): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hermiston 1 SE Thresholds

Hermiston 1 SE: days with a maximum temperature at or above 30 C (86 F) in 86 years, most in 1936 with 98.
Hermiston 1 SE: days with a maximum temperature at or above 35 C (95 F) in 86 years, most in 1958 with 49.
Hermiston 1 SE: days with a maximum temperature at or above 90 F (32.2 C) in 86 years, most in 1934 with 76.
Hermiston 1 SE: nights with a minimum temperature at or below 0 C (32 F) in 86 years, most in 1911 with 143.
19 fixed thresholds have at least one qualifying day at Hermiston 1 SE.

Days at or above 30 C (86 F)

86 years with a qualifying day

Days per year at Hermiston 1 SE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 98 in 1936.

Days at or above 30 C (86 F) per year at Hermiston 1 SE
Year	Days	Decade average
1908	75	70.5
1909	66	70.5
1910	72	70.3
1911	77	70.3
1912	65	70.3
1913	61	70.3
1914	75	70.3
1915	70	70.3
1916	54	70.3
1917	73	70.3
1918	82	70.3
1919	74	70.3
1920	63	74.5
1921	64	74.5
1922	87	74.5
1923	69	74.5
1924	87	74.5
1925	78	74.5
1926	78	74.5
1927	60	74.5
1928	78	74.5
1929	81	74.5
1930	70	83.5
1931	81	83.5
1932	73	83.5
1933	70	83.5
1934	96	83.5
1935	89	83.5
1936	98	83.5
1937	79	83.5
1938	95	83.5
1939	84	83.5
1940	92	68.7
1941	60	68.7
1942	72	68.7
1943	73	68.7
1944	71	68.7
1945	74	68.7
1946	63	68.7
1947	67	68.7
1948	53	68.7
1949	62	68.7
1950	70	65.3
1951	85	65.3
1952	69	65.3
1953	55	65.3
1954	43	65.3
1955	58	65.3
1956	68	65.3
1957	63	65.3
1958	91	65.3
1959	51	65.3
1960	68	61.2
1961	72	61.2
1962	55	61.2
1963	55	61.2
1964	37	61.2
1965	50	61.2
1966	62	61.2
1967	87	61.2
1968	54	61.2
1969	72	61.2
1970	69	58.6
1971	60	58.6
1972	68	58.6
1973	64	58.6
1974	65	58.6
1975	55	58.6
1976	45	58.6
1977	56	58.6
1978	45	58.6
1979	59	58.6
1980	40	49.2
1981	48	49.2
1982	47	49.2
1983	37	49.2
1984	44	49.2
1985	50	49.2
1986	66	49.2
1987	63	49.2
1988	62	49.2
1989	35	49.2
1990	64	60.8
1993	45	60.8
1994	71	60.8
1995	63	60.8

For each year, a bar from the first to the last day at Hermiston 1 SE meeting 30 C (86 F).

First to last qualifying date each year at Hermiston 1 SE
Year	First date	Last date
1908	1908-05-05	1908-09-30
1909	1909-05-03	1909-09-16
1910	1910-04-18	1910-09-03
1911	1911-04-24	1911-10-08
1912	1912-05-08	1912-09-20
1913	1913-04-26	1913-09-18
1914	1914-05-13	1914-09-24
1915	1915-05-06	1915-09-19
1916	1916-06-03	1916-09-21
1917	1917-06-08	1917-09-20
1918	1918-05-03	1918-09-29
1919	1919-05-18	1919-09-26
1920	1920-05-07	1920-09-17
1921	1921-05-24	1921-08-30
1922	1922-05-15	1922-09-19
1923	1923-05-07	1923-09-14
1924	1924-05-08	1924-09-17
1925	1925-04-09	1925-09-24
1926	1926-04-15	1926-09-06
1927	1927-04-25	1927-08-23
1928	1928-05-05	1928-09-05
1929	1929-05-11	1929-09-17
1930	1930-06-06	1930-09-21
1931	1931-04-29	1931-09-05
1932	1932-05-12	1932-10-02
1933	1933-05-25	1933-09-13
1934	1934-04-07	1934-10-11
1935	1935-05-04	1935-10-01
1936	1936-04-12	1936-09-29
1937	1937-05-02	1937-09-18
1938	1938-05-22	1938-09-23
1939	1939-04-18	1939-09-23
1940	1940-05-09	1940-09-26
1941	1941-05-11	1941-08-23
1942	1942-04-20	1942-09-27
1943	1943-04-13	1943-10-08
1944	1944-05-04	1944-09-25
1945	1945-05-02	1945-09-13
1946	1946-04-25	1946-09-24
1947	1947-04-13	1947-09-24
1948	1948-05-25	1948-09-14
1949	1949-05-08	1949-09-27
1950	1950-05-13	1950-09-24
1951	1951-04-18	1951-09-20
1952	1952-04-19	1952-09-27
1953	1953-05-06	1953-09-19
1954	1954-05-17	1954-09-27
1955	1955-05-20	1955-09-11
1956	1956-05-17	1956-09-26
1957	1957-04-30	1957-09-25
1958	1958-05-17	1958-10-06
1959	1959-05-14	1959-09-14
1960	1960-05-11	1960-09-20
1961	1961-05-20	1961-09-05
1962	1962-06-09	1962-09-27
1963	1963-05-21	1963-09-30
1964	1964-06-01	1964-09-25
1965	1965-04-28	1965-09-02
1966	1966-05-04	1966-09-23
1967	1967-05-17	1967-09-29
1968	1968-04-30	1968-10-01
1969	1969-05-09	1969-09-13
1970	1970-05-16	1970-10-01
1971	1971-05-04	1971-09-11
1972	1972-05-14	1972-09-17
1973	1973-05-14	1973-09-13
1974	1974-06-11	1974-09-26
1975	1975-05-31	1975-09-16
1976	1976-05-09	1976-10-01
1977	1977-04-08	1977-09-14
1978	1978-05-21	1978-09-04
1979	1979-05-23	1979-09-21
1980	1980-04-28	1980-10-08
1981	1981-05-01	1981-09-19
1982	1982-06-11	1982-09-03
1983	1983-05-21	1983-09-01
1984	1984-05-30	1984-09-19
1985	1985-05-18	1985-08-30
1986	1986-05-26	1986-09-06
1987	1987-04-29	1987-09-24
1988	1988-05-12	1988-09-16
1989	1989-07-07	1989-09-25
1990	1990-05-06	1990-09-26
1993	1993-05-11	1993-10-01
1994	1994-04-19	1994-09-28
1995	1995-05-25	1995-09-18

Every Fixed Threshold

Fixed thresholds at Hermiston 1 SE
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	86	98	1936	63
35 C (95 F): Days	86	49	1958	13
40 C (104 F): Days	49	11	1971	4
45 C (113 F): Days	1	1	1961	1
90 F (32.2 C): Days	86	76	1934	45
100 F (37.8 C): Days	83	21	1971	4
110 F (43.3 C): Days	5	1	1926	1
0 C (32 F): Ice days (max	84	62	1985	8
0 C (32 F): Frost days (min	86	143	1911	71
-10 C (14 F): Days with min	81	42	1916	2
-20 C (-4 F): Days with min	46	11	1937	1
-30 C (-22 F): Days with min	10	6	1950	3
20 C (68 F): Tropical nights (min	77	11	1908	3
25 C (77 F): Days with min	4	2	1994	1
10 mm (0.39 in): Days with 10 mm or more rain	85	10	1994	3
25 mm (0.98 in): Days with 25 mm or more rain	11	1	1909	1
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	30	4	1916	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1921	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1908.

Download the Data

Data for Hermiston 1 SE 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).

Hermiston 1 SE Threshold Days by Year (USC00353847)

Key Facts for Hermiston 1 SE Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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