Spearfish Threshold Days by Year (USC00397882)

19 fixed thresholds counted per year at Spearfish (USC00397882): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Spearfish Thresholds

Spearfish: days with 10 mm (0.39 in) or more of precipitation in 106 years, most in 2008 with 28.
Spearfish: days with 25 mm (0.98 in) or more of precipitation in 104 years, most in 1946 with 14.
Spearfish: nights with a minimum temperature at or below 0 C (32 F) in 103 years, most in 1920 with 212.
Spearfish: nights with a minimum temperature at or below -10 C (14 F) in 103 years, most in 1978 with 86.
19 fixed thresholds have at least one qualifying day at Spearfish.

Days at or above 30 C (86 F)

102 years with a qualifying day

Days per year at Spearfish with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 75 in 1931.

Days at or above 30 C (86 F) per year at Spearfish
Year	Days	Decade average
1893	60	35.3
1897	28	35.3
1898	32	35.3
1899	21	35.3
1900	42	26.6
1902	17	26.6
1903	16	26.6
1904	18	26.6
1905	32	26.6
1906	29	26.6
1907	13	26.6
1908	46	26.6
1911	44	35.2
1912	13	35.2
1913	40	35.2
1914	39	35.2
1915	5	35.2
1916	28	35.2
1917	47	35.2
1918	31	35.2
1919	70	35.2
1920	42	34.4
1921	49	34.4
1923	23	34.4
1924	21	34.4
1925	39	34.4
1926	31	34.4
1927	19	34.4
1928	32	34.4
1929	54	34.4
1930	60	57
1931	75	57
1932	49	57
1938	43	57
1939	58	57
1940	55	35.4
1941	42	35.4
1942	22	35.4
1943	40	35.4
1944	23	35.4
1945	34	35.4
1946	32	35.4
1950	33	48.3
1951	24	48.3
1952	68	48.3
1953	48	48.3
1954	56	48.3
1955	61	48.3
1957	39	48.3
1958	33	48.3
1959	73	48.3
1960	54	44.4
1962	27	44.4
1963	55	44.4
1964	54	44.4
1966	49	44.4
1967	38	44.4
1968	31	44.4
1969	47	44.4
1970	63	41.6
1971	44	41.6
1972	29	41.6
1973	37	41.6
1974	45	41.6
1975	37	41.6
1976	43	41.6
1977	36	41.6
1978	48	41.6
1979	34	41.6
1980	60	40.4
1981	26	40.4
1982	36	40.4
1986	37	40.4
1989	43	40.4
1990	39	33.8
1993	12	33.8
1994	45	33.8
1995	38	33.8
1996	40	33.8
1997	29	33.8
2005	64	56.8
2006	65	56.8
2007	75	56.8
2008	47	56.8
2009	33	56.8
2010	54	41.7
2011	40	41.7
2012	62	41.7
2013	38	41.7
2014	27	41.7
2015	42	41.7
2016	58	41.7
2017	53	41.7
2018	28	41.7
2019	15	41.7
2020	30	39.9
2021	56	39.9
2022	57	39.9
2023	29	39.9
2024	39	39.9
2025	23	39.9
2026	45	39.9

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

First to last qualifying date each year at Spearfish
Year	First date	Last date
1893	1893-05-17	1893-09-20
1897	1897-05-25	1897-10-22
1898	1898-06-16	1898-09-27
1899	1899-06-18	1899-10-01
1900	1900-05-10	1900-09-07
1902	1902-06-08	1902-09-24
1903	1903-06-17	1903-08-21
1904	1904-06-18	1904-09-09
1905	1905-06-02	1905-09-28
1906	1906-05-11	1906-09-09
1907	1907-06-28	1907-08-24
1908	1908-06-05	1908-10-15
1911	1911-05-06	1911-09-16
1912	1912-06-23	1912-09-03
1913	1913-05-29	1913-09-13
1914	1914-06-02	1914-09-26
1915	1915-08-05	1915-09-03
1916	1916-06-17	1916-09-09
1917	1917-05-15	1917-09-22
1918	1918-06-09	1918-09-22
1919	1919-05-25	1919-09-13
1920	1920-06-08	1920-10-09
1921	1921-04-04	1921-09-25
1923	1923-05-26	1923-09-21
1924	1924-07-05	1924-09-04
1925	1925-05-19	1925-09-17
1926	1926-05-24	1926-08-31
1927	1927-06-18	1927-09-11
1928	1928-07-05	1928-10-09
1929	1929-05-24	1929-09-15
1930	1930-05-25	1930-09-22
1931	1931-05-14	1931-09-29
1932	1932-05-13	1932-09-10
1938	1938-06-16	1938-10-27
1939	1939-05-15	1939-09-18
1940	1940-05-11	1940-09-12
1941	1941-05-12	1941-09-19
1942	1942-07-07	1942-09-10
1943	1943-05-28	1943-09-26
1944	1944-06-24	1944-09-08
1945	1945-06-21	1945-09-05
1946	1946-06-22	1946-09-16
1950	1950-06-05	1950-09-07
1951	1951-05-28	1951-08-29
1952	1952-05-02	1952-09-28
1953	1953-05-27	1953-10-10
1954	1954-05-20	1954-09-26
1955	1955-05-21	1955-09-16
1957	1957-06-04	1957-10-03
1958	1958-05-11	1958-09-23
1959	1959-06-05	1959-09-14
1960	1960-05-31	1960-09-20
1962	1962-04-24	1962-09-11
1963	1963-06-13	1963-10-05
1964	1964-05-17	1964-09-17
1966	1966-05-04	1966-09-12
1967	1967-05-24	1967-09-30
1968	1968-06-02	1968-09-14
1969	1969-05-26	1969-09-20
1970	1970-06-09	1970-09-20
1971	1971-06-24	1971-09-14
1972	1972-05-17	1972-09-19
1973	1973-06-09	1973-09-08
1974	1974-06-14	1974-09-27
1975	1975-06-25	1975-10-08
1976	1976-06-04	1976-10-02
1977	1977-05-24	1977-09-15
1978	1978-05-16	1978-09-26
1979	1979-05-16	1979-09-27
1980	1980-04-21	1980-10-01
1981	1981-06-07	1981-09-20
1982	1982-06-23	1982-09-11
1986	1986-05-04	1986-08-30
1989	1989-05-24	1989-10-01
1990	1990-06-19	1990-09-12
1993	1993-06-21	1993-09-11
1994	1994-04-22	1994-09-09
1995	1995-06-14	1995-09-05
1996	1996-05-16	1996-09-05
1997	1997-06-22	1997-10-02
2005	2005-06-17	2005-10-03
2006	2006-05-26	2006-10-01
2007	2007-05-13	2007-09-18
2008	2008-06-30	2008-09-26
2009	2009-05-18	2009-09-15
2010	2010-06-16	2010-09-29
2011	2011-06-29	2011-10-05
2012	2012-05-17	2012-09-11
2013	2013-05-14	2013-09-23
2014	2014-06-18	2014-09-26
2015	2015-06-09	2015-10-11
2016	2016-05-06	2016-09-03
2017	2017-05-07	2017-09-13
2018	2018-05-26	2018-09-13
2019	2019-06-07	2019-09-20
2020	2020-06-01	2020-09-25
2021	2021-06-04	2021-09-29
2022	2022-05-28	2022-09-21
2023	2023-06-19	2023-09-05
2024	2024-05-30	2024-09-30
2025	2025-05-12	2025-09-13
2026	2026-05-14	2026-09-08

Every Fixed Threshold

Fixed thresholds at Spearfish
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	102	75	1931	45
35 C (95 F): Days	93	34	1931	11
40 C (104 F): Days	18	5	2006	5
90 F (32.2 C): Days	101	55	1959	25
100 F (37.8 C): Days	50	13	1931	2
0 C (32 F): Ice days (max	102	75	1978	16
0 C (32 F): Frost days (min	103	212	1920	91
-10 C (14 F): Days with min	103	86	1978	18
-20 C (-4 F): Days with min	103	40	1916	4
-30 C (-22 F): Days with min	44	7	1916	3
20 C (68 F): Tropical nights (min	90	21	1931	8
25 C (77 F): Days with min	15	10	1931	1
10 mm (0.39 in): Days with 10 mm or more rain	106	28	2008	7
25 mm (0.98 in): Days with 25 mm or more rain	104	14	1946	1
50 mm (1.97 in): Days with 50 mm or more rain	48	4	1903	1
100 mm (3.94 in): Days with 100 mm or more rain	5	1	1905	1
10 cm (3.9 in): Days with 10 cm or more snowfall	56	12	1971	3
25 cm (9.8 in): Days with 25 cm or more snowfall	31	4	2009	1
50 cm (19.7 in): Days with 50 cm or more snowfall	7	3	1944	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Spearfish 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).

Spearfish Threshold Days by Year (USC00397882)

Key Facts for Spearfish Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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