Belle Fourche Threshold Days by Year (USC00390559)

21 fixed thresholds counted per year at Belle Fourche (USC00390559): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Belle Fourche Thresholds

Belle Fourche: nights with a minimum temperature at or below 0 C (32 F) in 96 years, most in 1917 with 203.
Belle Fourche: nights with a minimum temperature at or below -10 C (14 F) in 96 years, most in 1978 with 98.
Belle Fourche: nights with a minimum temperature at or below -20 C (-4 F) in 96 years, most in 1916 with 44.
Belle Fourche: days with 10 mm (0.39 in) or more of precipitation in 93 years, most in 2013 with 22.
21 fixed thresholds have at least one qualifying day at Belle Fourche.

Days at or above 30 C (86 F)

84 years with a qualifying day

Days per year at Belle Fourche with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 90 in 2021.

Days at or above 30 C (86 F) per year at Belle Fourche
Year	Days	Decade average
1909	52	52
1911	49	44.4
1912	18	44.4
1914	53	44.4
1915	14	44.4
1916	52	44.4
1917	54	44.4
1918	47	44.4
1919	68	44.4
1920	39	45.3
1921	65	45.3
1922	45	45.3
1923	31	45.3
1924	37	45.3
1925	55	45.3
1926	45	45.3
1928	34	45.3
1929	57	45.3
1930	56	63.7
1931	89	63.7
1932	63	63.7
1933	63	63.7
1934	65	63.7
1935	62	63.7
1937	56	63.7
1938	48	63.7
1939	71	63.7
1940	63	47.4
1941	49	47.4
1942	36	47.4
1943	59	47.4
1944	31	47.4
1945	40	47.4
1946	32	47.4
1947	51	47.4
1948	50	47.4
1949	63	47.4
1950	41	60.2
1951	34	60.2
1952	81	60.2
1953	62	60.2
1954	62	60.2
1955	79	60.2
1956	58	60.2
1957	51	60.2
1958	51	60.2
1959	83	60.2
1960	69	55.1
1961	73	55.1
1962	32	55.1
1964	52	55.1
1965	25	55.1
1966	67	55.1
1967	63	55.1
1968	47	55.1
1969	68	55.1
1970	86	68.1
1971	61	68.1
1972	57	68.1
1973	64	68.1
1974	64	68.1
1975	66	68.1
1976	80	68.1
1977	68	68.1
1978	68	68.1
1979	67	68.1
1980	86	69.3
1981	61	69.3
1989	61	69.3
1990	59	47.3
1991	44	47.3
1992	29	47.3
1997	57	47.3
2010	53	54.7
2011	63	54.7
2012	84	54.7
2013	53	54.7
2014	43	54.7
2015	60	54.7
2016	59	54.7
2017	53	54.7
2018	48	54.7
2019	31	54.7
2021	90	90

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

First to last qualifying date each year at Belle Fourche
Year	First date	Last date
1909	1909-06-04	1909-09-30
1911	1911-05-08	1911-09-16
1912	1912-06-09	1912-07-30
1914	1914-06-02	1914-10-18
1915	1915-07-12	1915-10-21
1916	1916-05-09	1916-09-30
1917	1917-05-13	1917-09-23
1918	1918-05-04	1918-09-22
1919	1919-05-24	1919-09-17
1920	1920-06-08	1920-10-06
1921	1921-05-21	1921-10-04
1922	1922-05-08	1922-10-04
1923	1923-06-16	1923-09-21
1924	1924-05-03	1924-09-30
1925	1925-05-19	1925-09-24
1926	1926-04-16	1926-10-08
1928	1928-05-07	1928-10-09
1929	1929-05-22	1929-09-14
1930	1930-05-20	1930-09-22
1931	1931-05-14	1931-10-01
1932	1932-05-12	1932-09-14
1933	1933-05-31	1933-09-29
1934	1934-05-01	1934-10-07
1935	1935-06-23	1935-09-23
1937	1937-05-19	1937-09-20
1938	1938-04-30	1938-09-24
1939	1939-04-22	1939-09-18
1940	1940-05-11	1940-09-16
1941	1941-05-12	1941-09-19
1942	1942-04-14	1942-10-01
1943	1943-05-27	1943-09-27
1944	1944-05-13	1944-09-08
1945	1945-06-21	1945-09-06
1946	1946-06-06	1946-09-16
1947	1947-05-02	1947-10-05
1948	1948-05-17	1948-10-03
1949	1949-04-29	1949-10-05
1950	1950-05-22	1950-10-15
1951	1951-05-28	1951-08-30
1952	1952-04-26	1952-09-27
1953	1953-04-23	1953-10-10
1954	1954-05-20	1954-10-08
1955	1955-04-29	1955-10-10
1956	1956-05-21	1956-10-12
1957	1957-06-02	1957-10-02
1958	1958-05-11	1958-10-19
1959	1959-04-30	1959-09-15
1960	1960-05-12	1960-10-04
1961	1961-05-10	1961-09-17
1962	1962-04-24	1962-09-27
1964	1964-05-20	1964-09-17
1965	1965-05-20	1965-10-09
1966	1966-05-04	1966-09-12
1967	1967-05-22	1967-10-01
1968	1968-06-02	1968-09-15
1969	1969-05-26	1969-09-28
1970	1970-05-06	1970-10-05
1971	1971-06-21	1971-09-13
1972	1972-05-15	1972-09-19
1973	1973-05-18	1973-09-08
1974	1974-04-24	1974-09-27
1975	1975-06-20	1975-10-08
1976	1976-05-04	1976-10-02
1977	1977-04-09	1977-09-20
1978	1978-05-15	1978-10-10
1979	1979-04-18	1979-10-01
1980	1980-04-19	1980-10-08
1981	1981-04-16	1981-09-19
1989	1989-04-22	1989-10-01
1990	1990-06-18	1990-09-25
1991	1991-06-11	1991-10-17
1992	1992-04-30	1992-10-02
1997	1997-05-17	1997-10-08
2010	2010-06-16	2010-10-07
2011	2011-06-03	2011-10-05
2012	2012-04-23	2012-09-15
2013	2013-05-13	2013-09-24
2014	2014-05-29	2014-09-27
2015	2015-06-01	2015-10-18
2016	2016-06-08	2016-09-11
2017	2017-05-06	2017-09-13
2018	2018-05-25	2018-09-10
2019	2019-06-06	2019-09-19
2021	2021-05-01	2021-10-07

Every Fixed Threshold

Fixed thresholds at Belle Fourche
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	84	90	2021	90
35 C (95 F): Days	83	41	1931	29
40 C (104 F): Days	39	11	1931	5
90 F (32.2 C): Days	84	64	1931	63
100 F (37.8 C): Days	70	23	1931	11
110 F (43.3 C): Days	2	2	1931	1
0 C (32 F): Ice days (max	84	72	1978	25
0 C (32 F): Frost days (min	96	203	1917	161
-10 C (14 F): Days with min	96	98	1978	41
-20 C (-4 F): Days with min	96	44	1916	11
-30 C (-22 F): Days with min	78	10	1916	4
-40 C (-40 F): Days with min	2	1	1929	1
20 C (68 F): Tropical nights (min	66	27	2012	4
25 C (77 F): Days with min	7	8	2012	3
10 mm (0.39 in): Days with 10 mm or more rain	93	22	2013	10
25 mm (0.98 in): Days with 25 mm or more rain	78	7	1941	2
50 mm (1.97 in): Days with 50 mm or more rain	24	2	1941	1
100 mm (3.94 in): Days with 100 mm or more rain	1	0	n/a	1
10 cm (3.9 in): Days with 10 cm or more snowfall	55	8	1970	1
25 cm (9.8 in): Days with 25 cm or more snowfall	9	2	1944	1
50 cm (19.7 in): Days with 50 cm or more snowfall	2	1	1970	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 Belle Fourche 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Belle Fourche Threshold Days by Year (USC00390559)

Key Facts for Belle Fourche Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related