Glenns Ferry Threshold Days by Year

19 fixed thresholds counted per year at Glenns Ferry (USC00103631): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Glenns Ferry Thresholds

Glenns Ferry: days with 10 mm (0.39 in) or more of precipitation in 84 years, most in 1970 with 16.
Glenns Ferry: days with a maximum temperature at or above 30 C (86 F) in 70 years, most in 1919 with 144.
Glenns Ferry: days with a maximum temperature at or above 35 C (95 F) in 70 years, most in 1919 with 100.
Glenns Ferry: days with a maximum temperature at or above 90 F (32.2 C) in 70 years, most in 1919 with 133.
19 fixed thresholds have at least one qualifying day at Glenns Ferry.

Days at or above 30 C (86 F)

70 years with a qualifying day

Days per year at Glenns Ferry with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 144 in 1919.

Days at or above 30 C (86 F) per year at Glenns Ferry
Year	Days	Decade average
1909	107	107
1910	112	100.9
1911	85	100.9
1912	71	100.9
1913	94	100.9
1914	102	100.9
1915	100	100.9
1916	92	100.9
1918	108	100.9
1919	144	100.9
1920	86	93.5
1921	117	93.5
1922	113	93.5
1923	91	93.5
1924	105	93.5
1925	90	93.5
1926	77	93.5
1927	78	93.5
1928	96	93.5
1929	82	93.5
1931	112	95.8
1932	92	95.8
1933	96	95.8
1939	83	95.8
1940	96	86.3
1941	79	86.3
1942	83	86.3
1943	97	86.3
1944	77	86.3
1945	83	86.3
1946	89	86.3
1951	62	73.3
1952	78	73.3
1956	80	73.3
1960	104	93.9
1961	100	93.9
1962	95	93.9
1963	92	93.9
1964	86	93.9
1965	71	93.9
1966	105	93.9
1967	102	93.9
1968	79	93.9
1969	105	93.9
1970	87	80.5
1971	80	80.5
1974	96	80.5
1975	77	80.5
1976	61	80.5
1977	88	80.5
1978	73	80.5
1979	82	80.5
1980	80	77.8
1982	79	77.8
1983	55	77.8
1984	83	77.8
1985	78	77.8
1986	92	77.8
2003	119	119
2016	102	100.3
2017	103	100.3
2018	101	100.3
2019	95	100.3
2020	105	108.3
2021	116	108.3
2022	104	108.3
2023	114	108.3
2024	113	108.3
2025	107	108.3
2026	99	108.3

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

First to last qualifying date each year at Glenns Ferry
Year	First date	Last date
1909	1909-05-03	1909-09-27
1910	1910-04-18	1910-10-11
1911	1911-05-04	1911-10-08
1912	1912-05-16	1912-09-30
1913	1913-05-06	1913-10-02
1914	1914-05-07	1914-10-15
1915	1915-04-25	1915-10-23
1916	1916-04-25	1916-09-19
1918	1918-05-02	1918-10-07
1919	1919-03-30	1919-10-01
1920	1920-05-27	1920-10-01
1921	1921-03-04	1921-10-01
1922	1922-05-15	1922-09-21
1923	1923-05-25	1923-09-16
1924	1924-05-11	1924-09-29
1925	1925-04-10	1925-09-27
1926	1926-04-28	1926-09-05
1927	1927-04-25	1927-10-16
1928	1928-05-05	1928-10-06
1929	1929-05-19	1929-09-18
1931	1931-05-06	1931-09-17
1932	1932-05-09	1932-09-17
1933	1933-04-23	1933-10-20
1939	1939-04-28	1939-09-26
1940	1940-04-13	1940-09-17
1941	1941-05-10	1941-09-18
1942	1942-04-21	1942-10-09
1943	1943-04-15	1943-10-04
1944	1944-05-05	1944-09-25
1945	1945-04-20	1945-09-15
1946	1946-04-16	1946-09-29
1951	1951-05-22	1951-10-09
1952	1952-04-24	1952-10-08
1956	1956-04-21	1956-09-27
1960	1960-05-09	1960-10-05
1961	1961-05-09	1961-10-15
1962	1962-04-14	1962-10-02
1963	1963-05-18	1963-10-11
1964	1964-05-16	1964-10-14
1965	1965-05-28	1965-10-04
1966	1966-05-02	1966-09-24
1967	1967-05-17	1967-09-29
1968	1968-04-29	1968-09-18
1969	1969-04-21	1969-09-28
1970	1970-05-04	1970-10-03
1971	1971-05-02	1971-10-10
1974	1974-05-25	1974-10-02
1975	1975-05-14	1975-10-02
1976	1976-05-13	1976-09-30
1977	1977-04-08	1977-09-13
1978	1978-05-14	1978-09-27
1979	1979-05-14	1979-10-07
1980	1980-04-19	1980-10-07
1982	1982-05-01	1982-09-23
1983	1983-05-23	1983-09-26
1984	1984-05-13	1984-10-08
1985	1985-04-14	1985-09-04
1986	1986-05-02	1986-09-07
2003	2003-05-15	2003-10-23
2016	2016-04-22	2016-10-10
2017	2017-05-05	2017-09-14
2018	2018-04-27	2018-09-29
2019	2019-05-12	2019-09-17
2020	2020-04-30	2020-10-08
2021	2021-04-30	2021-10-06
2022	2022-05-16	2022-10-07
2023	2023-04-29	2023-10-20
2024	2024-05-11	2024-10-17
2025	2025-05-09	2025-10-10
2026	2026-03-18	2026-09-30

Every Fixed Threshold

Fixed thresholds at Glenns Ferry
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	70	144	1919	99
35 C (95 F): Days	70	100	1919	60
40 C (104 F): Days	66	40	1919	17
45 C (113 F): Days	3	3	2003	3
90 F (32.2 C): Days	70	133	1919	81
100 F (37.8 C): Days	70	79	1919	31
110 F (43.3 C): Days	18	7	2003	3
0 C (32 F): Ice days (max	67	58	1985	6
0 C (32 F): Frost days (min	68	190	1976	57
-10 C (14 F): Days with min	67	70	1985	10
-20 C (-4 F): Days with min	30	14	1985	2
-30 C (-22 F): Days with min	2	3	1924	3
20 C (68 F): Tropical nights (min	57	12	1921	14
25 C (77 F): Days with min	4	1	1910	1
10 mm (0.39 in): Days with 10 mm or more rain	84	16	1970	4
25 mm (0.98 in): Days with 25 mm or more rain	19	2	1923	1
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1923	1
10 cm (3.9 in): Days with 10 cm or more snowfall	30	6	1952	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	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 1909.

Download the Data

Data for Glenns Ferry 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).

Glenns Ferry Threshold Days by Year

Key Facts for Glenns Ferry Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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