Chadron 3SW Threshold Days by Year (USC00251575)

20 fixed thresholds counted per year at Chadron 3SW (USC00251575): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chadron 3SW Thresholds

Chadron 3SW: days with 10 mm (0.39 in) or more of precipitation in 101 years, most in 1915 with 27.
Chadron 3SW: nights with a minimum temperature at or below 0 C (32 F) in 100 years, most in 2013 with 199.
Chadron 3SW: nights with a minimum temperature at or below -10 C (14 F) in 100 years, most in 1978 with 91.
Chadron 3SW: nights with a minimum temperature at or below -20 C (-4 F) in 100 years, most in 1949 with 30.
20 fixed thresholds have at least one qualifying day at Chadron 3SW.

Days at or above 30 C (86 F)

89 years with a qualifying day

Days per year at Chadron 3SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 96 in 2024.

Days at or above 30 C (86 F) per year at Chadron 3SW
Year	Days	Decade average
1915	20	45.3
1917	43	45.3
1919	73	45.3
1921	53	53.8
1926	65	53.8
1928	44	53.8
1929	53	53.8
1930	54	75.8
1933	80	75.8
1936	90	75.8
1937	76	75.8
1938	75	75.8
1939	80	75.8
1940	81	64.6
1941	63	64.6
1942	49	64.6
1943	76	64.6
1944	54	64.6
1945	58	64.6
1946	67	64.6
1947	66	64.6
1948	72	64.6
1949	60	64.6
1950	55	67.9
1951	41	67.9
1952	81	67.9
1953	74	67.9
1954	73	67.9
1955	77	67.9
1956	86	67.9
1957	49	67.9
1958	63	67.9
1959	80	67.9
1960	71	61.6
1961	75	61.6
1962	53	61.6
1963	51	61.6
1964	73	61.6
1965	41	61.6
1966	80	61.6
1967	51	61.6
1968	52	61.6
1969	69	61.6
1970	75	65.2
1971	63	65.2
1972	59	65.2
1973	62	65.2
1974	69	65.2
1975	67	65.2
1976	70	65.2
1977	59	65.2
1978	72	65.2
1979	56	65.2
1980	73	69.5
1981	65	69.5
1982	55	69.5
1984	76	69.5
1985	82	69.5
1989	66	69.5
1994	72	55.8
1995	49	55.8
1996	52	55.8
1997	46	55.8
1998	64	55.8
1999	52	55.8
2000	76	70.4
2001	69	70.4
2002	74	70.4
2003	63	70.4
2006	76	70.4
2007	92	70.4
2009	43	70.4
2010	65	67
2011	70	67
2012	95	67
2013	67	67
2014	52	67
2015	58	67
2016	78	67
2017	63	67
2018	68	67
2019	54	67
2020	88	82.9
2021	88	82.9
2022	84	82.9
2023	51	82.9
2024	96	82.9
2025	74	82.9
2026	99	82.9

For each year, a bar from the first to the last day at Chadron 3SW meeting 30 C (86 F).

First to last qualifying date each year at Chadron 3SW
Year	First date	Last date
1915	1915-05-12	1915-10-10
1917	1917-06-09	1917-09-22
1919	1919-05-27	1919-09-17
1921	1921-06-10	1921-09-28
1926	1926-04-30	1926-09-19
1928	1928-05-01	1928-10-09
1929	1929-06-10	1929-09-02
1930	1930-05-25	1930-09-22
1933	1933-05-22	1933-09-29
1936	1936-05-04	1936-09-22
1937	1937-05-27	1937-10-03
1938	1938-05-28	1938-10-03
1939	1939-04-22	1939-09-22
1940	1940-05-03	1940-09-19
1941	1941-05-14	1941-10-12
1942	1942-04-14	1942-10-10
1943	1943-05-01	1943-09-27
1944	1944-05-13	1944-10-05
1945	1945-06-21	1945-09-21
1946	1946-06-04	1946-10-01
1947	1947-06-08	1947-10-21
1948	1948-04-17	1948-10-04
1949	1949-04-24	1949-10-05
1950	1950-05-22	1950-10-17
1951	1951-05-28	1951-10-01
1952	1952-04-26	1952-09-27
1953	1953-05-28	1953-10-11
1954	1954-05-20	1954-10-08
1955	1955-04-26	1955-10-10
1956	1956-05-08	1956-10-12
1957	1957-05-07	1957-10-01
1958	1958-05-21	1958-10-18
1959	1959-05-01	1959-09-14
1960	1960-04-10	1960-10-08
1961	1961-05-10	1961-09-18
1962	1962-04-20	1962-10-14
1963	1963-05-06	1963-10-05
1964	1964-05-13	1964-10-15
1965	1965-04-30	1965-10-09
1966	1966-05-04	1966-09-24
1967	1967-05-22	1967-10-03
1968	1968-06-02	1968-10-29
1969	1969-05-14	1969-09-28
1970	1970-05-17	1970-10-05
1971	1971-06-14	1971-09-13
1972	1972-05-16	1972-09-22
1973	1973-05-31	1973-09-07
1974	1974-05-27	1974-09-26
1975	1975-05-15	1975-10-11
1976	1976-05-14	1976-10-10
1977	1977-04-09	1977-09-28
1978	1978-05-14	1978-09-27
1979	1979-05-16	1979-09-30
1980	1980-04-20	1980-10-12
1981	1981-04-26	1981-10-02
1982	1982-05-02	1982-09-11
1984	1984-05-15	1984-09-21
1985	1985-04-15	1985-09-19
1989	1989-04-20	1989-09-30
1994	1994-05-17	1994-09-29
1995	1995-06-14	1995-09-16
1996	1996-04-11	1996-10-06
1997	1997-05-30	1997-10-05
1998	1998-06-20	1998-09-26
1999	1999-05-30	1999-10-12
2000	2000-05-05	2000-09-19
2001	2001-05-14	2001-09-27
2002	2002-05-31	2002-09-17
2003	2003-05-30	2003-10-20
2006	2006-05-19	2006-10-03
2007	2007-05-12	2007-10-04
2009	2009-04-24	2009-09-27
2010	2010-05-29	2010-10-08
2011	2011-06-03	2011-10-05
2012	2012-04-02	2012-10-03
2013	2013-05-14	2013-09-23
2014	2014-05-29	2014-10-16
2015	2015-06-02	2015-10-19
2016	2016-05-06	2016-10-28
2017	2017-05-07	2017-10-20
2018	2018-05-08	2018-09-24
2019	2019-06-04	2019-09-30
2020	2020-05-01	2020-10-09
2021	2021-06-04	2021-10-06
2022	2022-05-28	2022-09-30
2023	2023-04-12	2023-09-28
2024	2024-04-14	2024-10-11
2025	2025-05-11	2025-10-04
2026	2026-03-22	2026-10-11

Every Fixed Threshold

Fixed thresholds at Chadron 3SW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	89	96	2024	99
35 C (95 F): Days	89	52	2012	43
40 C (104 F): Days	54	18	1936	5
90 F (32.2 C): Days	89	77	2012	73
100 F (37.8 C): Days	82	33	1936	18
110 F (43.3 C): Days	4	1	1926	1
0 C (32 F): Ice days (max	89	76	1978	10
0 C (32 F): Frost days (min	100	199	2013	102
-10 C (14 F): Days with min	100	91	1978	24
-20 C (-4 F): Days with min	100	30	1949	10
-30 C (-22 F): Days with min	44	9	1989	1
-40 C (-40 F): Days with min	1	1	1989	1
20 C (68 F): Tropical nights (min	93	34	1936	15
25 C (77 F): Days with min	13	4	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	101	27	1915	10
25 mm (0.98 in): Days with 25 mm or more rain	93	11	1915	2
50 mm (1.97 in): Days with 50 mm or more rain	24	3	1997	1
10 cm (3.9 in): Days with 10 cm or more snowfall	79	7	2019	1
25 cm (9.8 in): Days with 25 cm or more snowfall	18	2	1919	1
50 cm (19.7 in): Days with 50 cm or more snowfall	2	1	1949	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Chadron 3SW 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).

Chadron 3SW Threshold Days by Year (USC00251575)

Key Facts for Chadron 3SW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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