Riggins Threshold Days by Year (USC00107706)

17 fixed thresholds counted per year at Riggins (USC00107706): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Riggins Thresholds

Riggins: days with 10 mm (0.39 in) or more of precipitation in 84 years, most in 1964 with 18.
Riggins: days with a maximum temperature at or above 30 C (86 F) in 77 years, most in 1967 with 105.
Riggins: days with a maximum temperature at or above 35 C (95 F) in 77 years, most in 1967 with 60.
Riggins: days with a maximum temperature at or above 90 F (32.2 C) in 77 years, most in 1967 with 90.
17 fixed thresholds have at least one qualifying day at Riggins.

Days at or above 30 C (86 F)

77 years with a qualifying day

Days per year at Riggins with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 105 in 1967.

Days at or above 30 C (86 F) per year at Riggins
Year	Days	Decade average
1896	63	63.3
1897	80	63.3
1898	66	63.3
1899	44	63.3
1900	40	56.1
1901	60	56.1
1902	52	56.1
1903	51	56.1
1904	67	56.1
1906	79	56.1
1907	44	56.1
1940	100	79.1
1941	61	79.1
1942	70	79.1
1943	78	79.1
1944	81	79.1
1945	76	79.1
1946	78	79.1
1947	84	79.1
1948	66	79.1
1949	97	79.1
1950	75	79
1951	73	79
1952	83	79
1955	81	79
1957	83	79
1961	87	81.8
1962	89	81.8
1963	89	81.8
1964	58	81.8
1965	61	81.8
1966	92	81.8
1967	105	81.8
1968	71	81.8
1969	84	81.8
1970	85	74.4
1971	76	74.4
1972	80	74.4
1973	87	74.4
1974	89	74.4
1975	53	74.4
1976	64	74.4
1977	81	74.4
1978	55	74.4
1981	77	85.4
1985	83	85.4
1986	87	85.4
1987	93	85.4
1988	87	85.4
1990	69	66.7
1992	85	66.7
1993	52	66.7
1994	77	66.7
1995	59	66.7
1996	63	66.7
1997	65	66.7
1998	68	66.7
1999	62	66.7
2000	84	85.8
2001	103	85.8
2002	87	85.8
2003	102	85.8
2004	69	85.8
2005	71	85.8
2006	85	85.8
2007	89	85.8
2008	80	85.8
2009	88	85.8
2018	60	63
2019	66	63
2020	63	72
2021	75	72
2022	66	72
2023	74	72
2024	75	72
2025	84	72
2026	67	72

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

First to last qualifying date each year at Riggins
Year	First date	Last date
1896	1896-06-15	1896-09-30
1897	1897-04-17	1897-09-26
1898	1898-04-25	1898-09-26
1899	1899-06-16	1899-10-04
1900	1900-05-03	1900-09-03
1901	1901-05-15	1901-09-19
1902	1902-05-13	1902-09-22
1903	1903-05-12	1903-09-04
1904	1904-05-22	1904-09-17
1906	1906-04-15	1906-09-30
1907	1907-05-28	1907-09-11
1940	1940-05-02	1940-09-26
1941	1941-04-30	1941-08-23
1942	1942-04-20	1942-10-09
1943	1943-04-14	1943-10-04
1944	1944-05-04	1944-10-03
1945	1945-05-03	1945-09-14
1946	1946-04-24	1946-09-30
1947	1947-05-01	1947-10-04
1948	1948-05-16	1948-09-22
1949	1949-04-07	1949-09-28
1950	1950-05-26	1950-09-25
1951	1951-05-10	1951-09-20
1952	1952-04-24	1952-10-03
1955	1955-06-06	1955-09-14
1957	1957-05-29	1957-10-01
1961	1961-05-26	1961-09-16
1962	1962-04-17	1962-09-27
1963	1963-05-21	1963-10-04
1964	1964-05-16	1964-09-17
1965	1965-05-12	1965-10-09
1966	1966-05-02	1966-09-23
1967	1967-05-18	1967-09-30
1968	1968-04-29	1968-09-13
1969	1969-05-10	1969-09-18
1970	1970-05-04	1970-09-04
1971	1971-05-11	1971-10-07
1972	1972-05-14	1972-09-18
1973	1973-05-13	1973-09-13
1974	1974-06-02	1974-09-26
1975	1975-05-15	1975-09-17
1976	1976-05-13	1976-09-29
1977	1977-04-23	1977-09-14
1978	1978-06-03	1978-09-27
1981	1981-04-30	1981-09-19
1985	1985-04-10	1985-09-04
1986	1986-04-21	1986-09-06
1987	1987-04-27	1987-10-02
1988	1988-04-13	1988-10-11
1990	1990-06-20	1990-10-01
1992	1992-04-03	1992-10-02
1993	1993-05-11	1993-10-04
1994	1994-04-18	1994-09-27
1995	1995-05-30	1995-09-19
1996	1996-04-09	1996-10-05
1997	1997-05-10	1997-10-02
1998	1998-04-30	1998-09-18
1999	1999-05-25	1999-09-24
2000	2000-04-13	2000-09-29
2001	2001-04-23	2001-10-07
2002	2002-05-14	2002-09-25
2003	2003-05-24	2003-10-07
2004	2004-04-13	2004-09-12
2005	2005-05-28	2005-09-16
2006	2006-05-15	2006-10-01
2007	2007-05-09	2007-09-14
2008	2008-05-17	2008-10-01
2009	2009-04-21	2009-09-29
2018	2018-04-27	2018-09-08
2019	2019-05-12	2019-09-16
2020	2020-04-30	2020-10-01
2021	2021-05-07	2021-09-27
2022	2022-06-23	2022-09-28
2023	2023-04-30	2023-10-09
2024	2024-05-17	2024-10-09
2025	2025-05-09	2025-09-26
2026	2026-05-12	2026-10-10

Every Fixed Threshold

Fixed thresholds at Riggins
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	77	105	1967	67
35 C (95 F): Days	77	60	1967	20
40 C (104 F): Days	63	18	2003	1
45 C (113 F): Days	4	1	1961	1
90 F (32.2 C): Days	77	90	1967	49
100 F (37.8 C): Days	76	34	2003	6
110 F (43.3 C): Days	12	4	1961	1
0 C (32 F): Ice days (max	71	36	1949	1
0 C (32 F): Frost days (min	70	151	2022	73
-10 C (14 F): Days with min	63	23	1949	1
-20 C (-4 F): Days with min	10	2	1949	1
20 C (68 F): Tropical nights (min	45	11	1961	2
10 mm (0.39 in): Days with 10 mm or more rain	84	18	1964	7
25 mm (0.98 in): Days with 25 mm or more rain	38	4	1904	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1978	1
10 cm (3.9 in): Days with 10 cm or more snowfall	19	2	1943	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	2025	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

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Data for Riggins 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Riggins Threshold Days by Year (USC00107706)

Key Facts for Riggins Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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