Ritzville 1 SSE Threshold Days by Year (USC00457059)

16 fixed thresholds counted per year at Ritzville 1 SSE (USC00457059): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ritzville 1 SSE Thresholds

Ritzville 1 SSE: nights with a minimum temperature at or below 0 C (32 F) in 107 years, most in 1970 with 184.
Ritzville 1 SSE: days with a maximum temperature at or above 30 C (86 F) in 106 years, most in 1922 with 77.
Ritzville 1 SSE: days with a maximum temperature at or above 35 C (95 F) in 106 years, most in 1958 with 37.
Ritzville 1 SSE: days with a maximum temperature at or above 90 F (32.2 C) in 106 years, most in 1958 with 67.
16 fixed thresholds have at least one qualifying day at Ritzville 1 SSE.

Days at or above 30 C (86 F)

106 years with a qualifying day

Days per year at Ritzville 1 SSE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 77 in 1922.

Days at or above 30 C (86 F) per year at Ritzville 1 SSE
Year	Days	Decade average
1917	56	55.7
1918	61	55.7
1919	50	55.7
1920	54	59.6
1921	54	59.6
1922	77	59.6
1923	66	59.6
1924	70	59.6
1926	46	59.6
1927	44	59.6
1928	60	59.6
1929	65	59.6
1930	55	59.7
1931	59	59.7
1932	54	59.7
1933	52	59.7
1934	72	59.7
1935	57	59.7
1936	62	59.7
1937	52	59.7
1938	73	59.7
1939	61	59.7
1940	65	56.4
1941	52	56.4
1942	52	56.4
1943	54	56.4
1944	56	56.4
1945	59	56.4
1946	43	56.4
1949	70	56.4
1950	57	54.9
1951	57	54.9
1952	65	54.9
1953	56	54.9
1954	38	54.9
1955	50	54.9
1956	60	54.9
1957	51	54.9
1958	74	54.9
1959	41	54.9
1960	59	50
1961	63	50
1962	44	50
1963	58	50
1964	31	50
1966	40	50
1967	71	50
1968	42	50
1969	42	50
1970	49	44.9
1971	47	44.9
1972	39	44.9
1973	53	44.9
1974	44	44.9
1975	38	44.9
1976	35	44.9
1977	48	44.9
1978	37	44.9
1979	59	44.9
1980	30	46.7
1981	51	46.7
1982	45	46.7
1983	41	46.7
1984	40	46.7
1985	51	46.7
1986	57	46.7
1987	60	46.7
1988	51	46.7
1989	41	46.7
1990	53	44
1991	42	44
1992	47	44
1993	25	44
1994	56	44
1995	35	44
1996	41	44
1997	37	44
1998	56	44
1999	48	44
2000	38	50.2
2001	53	50.2
2002	48	50.2
2003	62	50.2
2004	49	50.2
2005	41	50.2
2006	58	50.2
2007	59	50.2
2008	46	50.2
2009	48	50.2
2010	34	45.9
2011	45	45.9
2012	43	45.9
2013	61	45.9
2014	45	45.9
2015	56	45.9
2016	37	45.9
2017	60	45.9
2018	42	45.9
2019	36	45.9
2020	39	53
2021	62	53
2022	53	53
2023	52	53
2024	51	53
2025	62	53
2026	52	53

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

First to last qualifying date each year at Ritzville 1 SSE
Year	First date	Last date
1917	1917-06-14	1917-09-20
1918	1918-05-03	1918-09-28
1919	1919-05-18	1919-09-16
1920	1920-06-21	1920-09-17
1921	1921-05-24	1921-08-30
1922	1922-05-16	1922-09-25
1923	1923-05-07	1923-10-03
1924	1924-05-10	1924-09-16
1926	1926-04-15	1926-08-28
1927	1927-06-05	1927-08-23
1928	1928-05-20	1928-09-23
1929	1929-05-19	1929-09-17
1930	1930-05-27	1930-09-18
1931	1931-05-12	1931-09-06
1932	1932-06-12	1932-10-05
1933	1933-05-26	1933-10-08
1934	1934-04-19	1934-10-12
1935	1935-06-05	1935-10-03
1936	1936-04-16	1936-09-22
1937	1937-05-03	1937-09-19
1938	1938-05-23	1938-09-23
1939	1939-04-28	1939-09-24
1940	1940-05-23	1940-09-26
1941	1941-05-12	1941-08-23
1942	1942-06-30	1942-09-27
1943	1943-06-29	1943-10-09
1944	1944-05-15	1944-09-25
1945	1945-05-04	1945-09-15
1946	1946-04-26	1946-09-12
1949	1949-05-09	1949-09-29
1950	1950-06-12	1950-09-24
1951	1951-05-23	1951-09-19
1952	1952-06-03	1952-10-02
1953	1953-05-07	1953-09-16
1954	1954-05-17	1954-09-11
1955	1955-06-07	1955-09-11
1956	1956-05-17	1956-09-20
1957	1957-05-01	1957-09-27
1958	1958-05-19	1958-09-11
1959	1959-06-03	1959-09-14
1960	1960-05-12	1960-09-15
1961	1961-05-26	1961-08-30
1962	1962-06-16	1962-09-27
1963	1963-05-30	1963-09-30
1964	1964-06-24	1964-09-17
1966	1966-05-04	1966-09-23
1967	1967-06-16	1967-09-29
1968	1968-06-16	1968-09-11
1969	1969-05-11	1969-09-13
1970	1970-06-03	1970-09-01
1971	1971-05-12	1971-09-11
1972	1972-05-30	1972-09-05
1973	1973-05-14	1973-09-12
1974	1974-06-12	1974-09-25
1975	1975-06-02	1975-10-03
1976	1976-06-28	1976-10-02
1977	1977-04-24	1977-08-23
1978	1978-06-03	1978-09-04
1979	1979-05-23	1979-09-21
1980	1980-05-06	1980-10-07
1981	1981-06-26	1981-09-19
1982	1982-06-11	1982-09-19
1983	1983-05-24	1983-09-01
1984	1984-05-30	1984-09-19
1985	1985-05-18	1985-08-30
1986	1986-05-26	1986-09-05
1987	1987-04-28	1987-10-02
1988	1988-05-13	1988-09-15
1989	1989-06-02	1989-09-30
1990	1990-06-22	1990-09-25
1991	1991-07-03	1991-09-28
1992	1992-05-06	1992-10-02
1993	1993-05-12	1993-09-11
1994	1994-05-08	1994-09-28
1995	1995-05-30	1995-09-17
1996	1996-06-03	1996-09-12
1997	1997-05-15	1997-09-26
1998	1998-05-02	1998-09-17
1999	1999-05-24	1999-09-23
2000	2000-06-27	2000-09-15
2001	2001-05-13	2001-09-25
2002	2002-06-14	2002-09-16
2003	2003-05-25	2003-09-29
2004	2004-06-05	2004-09-01
2005	2005-05-29	2005-08-29
2006	2006-05-16	2006-09-09
2007	2007-05-09	2007-09-15
2008	2008-05-17	2008-10-02
2009	2009-05-30	2009-09-25
2010	2010-06-29	2010-09-04
2011	2011-06-23	2011-09-25
2012	2012-05-15	2012-09-09
2013	2013-05-09	2013-09-16
2014	2014-06-24	2014-09-22
2015	2015-05-30	2015-09-13
2016	2016-06-05	2016-09-27
2017	2017-05-29	2017-09-13
2018	2018-05-16	2018-09-08
2019	2019-06-02	2019-09-06
2020	2020-05-30	2020-09-11
2021	2021-05-17	2021-09-10
2022	2022-06-27	2022-09-28
2023	2023-05-19	2023-09-17
2024	2024-06-09	2024-09-26
2025	2025-05-26	2025-09-25
2026	2026-05-29	2026-08-27

Every Fixed Threshold

Fixed thresholds at Ritzville 1 SSE
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	106	77	1922	52
35 C (95 F): Days	106	37	1958	10
40 C (104 F): Days	51	5	1928	3
90 F (32.2 C): Days	106	67	1958	30
100 F (37.8 C): Days	93	13	1961	1
110 F (43.3 C): Days	4	1	1928	1
0 C (32 F): Ice days (max	106	79	1985	1
0 C (32 F): Frost days (min	107	184	1970	78
-10 C (14 F): Days with min	104	55	1985	8
-20 C (-4 F): Days with min	48	21	1950	2
-30 C (-22 F): Days with min	2	2	1950	1
20 C (68 F): Tropical nights (min	42	6	2021	1
10 mm (0.39 in): Days with 10 mm or more rain	101	14	1996	2
25 mm (0.98 in): Days with 25 mm or more rain	17	2	1993	1
10 cm (3.9 in): Days with 10 cm or more snowfall	33	5	1989	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1963	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

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Data for Ritzville 1 SSE 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Ritzville 1 SSE Threshold Days by Year (USC00457059)

Key Facts for Ritzville 1 SSE Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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