Bison Threshold Days by Year (USC00390701)

19 fixed thresholds counted per year at Bison (USC00390701): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bison Thresholds

Bison: days with 10 mm (0.39 in) or more of precipitation in 81 years, most in 2019 with 23.
Bison: days with a maximum temperature at or above 30 C (86 F) in 77 years, most in 1936 with 92.
Bison: days with a maximum temperature at or above 90 F (32.2 C) in 77 years, most in 1936 with 68.
Bison: days with a maximum temperature at or below 0 C (32 F) in 77 years, most in 1978 with 104.
19 fixed thresholds have at least one qualifying day at Bison.

Days at or above 30 C (86 F)

77 years with a qualifying day

Days per year at Bison with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 92 in 1936.

Days at or above 30 C (86 F) per year at Bison
Year	Days	Decade average
1917	31	30.5
1918	30	30.5
1932	44	62.3
1933	66	62.3
1935	58	62.3
1936	92	62.3
1937	60	62.3
1938	47	62.3
1939	69	62.3
1940	45	46
1941	59	46
1942	34	46
1950	31	43.3
1952	50	43.3
1953	23	43.3
1956	48	43.3
1957	38	43.3
1958	43	43.3
1959	70	43.3
1960	51	43.5
1963	55	43.5
1966	49	43.5
1967	36	43.5
1968	31	43.5
1969	39	43.5
1970	59	44.3
1971	46	44.3
1972	46	44.3
1973	42	44.3
1974	50	44.3
1977	38	44.3
1978	34	44.3
1979	39	44.3
1980	67	48.7
1981	39	48.7
1982	37	48.7
1983	57	48.7
1984	46	48.7
1985	39	48.7
1986	32	48.7
1987	43	48.7
1988	66	48.7
1989	61	48.7
1990	64	39.4
1991	29	39.4
1992	26	39.4
1993	13	39.4
1994	43	39.4
1995	42	39.4
1996	44	39.4
1997	36	39.4
1998	59	39.4
1999	38	39.4
2000	56	52.3
2001	58	52.3
2003	55	52.3
2004	45	52.3
2007	66	52.3
2008	55	52.3
2009	31	52.3
2010	43	45.7
2011	50	45.7
2012	71	45.7
2013	41	45.7
2014	23	45.7
2015	51	45.7
2016	54	45.7
2017	57	45.7
2018	46	45.7
2019	21	45.7
2020	51	55.9
2021	75	55.9
2022	62	55.9
2023	48	55.9
2024	56	55.9
2025	41	55.9
2026	58	55.9

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

First to last qualifying date each year at Bison
Year	First date	Last date
1917	1917-05-15	1917-09-23
1918	1918-05-04	1918-08-28
1932	1932-05-14	1932-09-09
1933	1933-05-31	1933-09-18
1935	1935-06-29	1935-10-15
1936	1936-05-14	1936-10-08
1937	1937-05-27	1937-10-03
1938	1938-04-30	1938-10-03
1939	1939-04-30	1939-09-18
1940	1940-05-11	1940-09-22
1941	1941-05-13	1941-09-19
1942	1942-07-03	1942-09-09
1950	1950-06-05	1950-09-07
1952	1952-04-27	1952-09-27
1953	1953-06-12	1953-10-01
1956	1956-05-21	1956-10-12
1957	1957-07-01	1957-10-02
1958	1958-05-10	1958-10-13
1959	1959-05-25	1959-09-14
1960	1960-05-12	1960-10-05
1963	1963-05-07	1963-09-30
1966	1966-05-04	1966-09-12
1967	1967-07-15	1967-09-30
1968	1968-04-30	1968-09-14
1969	1969-05-26	1969-09-20
1970	1970-05-17	1970-10-05
1971	1971-06-23	1971-09-11
1972	1972-05-16	1972-09-19
1973	1973-05-18	1973-08-31
1974	1974-06-03	1974-09-27
1977	1977-05-13	1977-09-05
1978	1978-06-15	1978-08-31
1979	1979-05-16	1979-09-26
1980	1980-04-20	1980-10-07
1981	1981-06-06	1981-09-13
1982	1982-05-03	1982-09-10
1983	1983-05-26	1983-09-27
1984	1984-05-16	1984-09-19
1985	1985-05-03	1985-09-15
1986	1986-05-04	1986-08-24
1987	1987-04-18	1987-09-03
1988	1988-05-29	1988-08-30
1989	1989-04-22	1989-09-30
1990	1990-06-09	1990-10-05
1991	1991-06-11	1991-10-17
1992	1992-04-30	1992-10-02
1993	1993-06-20	1993-10-06
1994	1994-05-17	1994-09-14
1995	1995-06-14	1995-09-15
1996	1996-06-09	1996-09-10
1997	1997-06-22	1997-10-03
1998	1998-05-17	1998-09-19
1999	1999-05-29	1999-09-22
2000	2000-06-07	2000-09-18
2001	2001-04-27	2001-09-06
2003	2003-05-29	2003-09-10
2004	2004-05-12	2004-09-19
2007	2007-05-18	2007-09-29
2008	2008-06-24	2008-09-27
2009	2009-06-25	2009-09-18
2010	2010-05-28	2010-09-28
2011	2011-06-02	2011-10-05
2012	2012-04-23	2012-09-15
2013	2013-05-13	2013-09-22
2014	2014-05-29	2014-09-26
2015	2015-06-08	2015-10-10
2016	2016-05-05	2016-09-11
2017	2017-05-06	2017-09-14
2018	2018-05-26	2018-09-09
2019	2019-05-16	2019-09-17
2020	2020-06-13	2020-09-15
2021	2021-06-03	2021-10-06
2022	2022-06-18	2022-09-30
2023	2023-04-11	2023-09-18
2024	2024-06-12	2024-09-30
2025	2025-05-10	2025-10-03
2026	2026-04-23	2026-08-30

Every Fixed Threshold

Fixed thresholds at Bison
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	77	92	1936	58
35 C (95 F): Days	73	43	1936	23
40 C (104 F): Days	26	16	1936	3
90 F (32.2 C): Days	77	68	1936	35
100 F (37.8 C): Days	59	25	1936	13
110 F (43.3 C): Days	1	2	1936	2
0 C (32 F): Ice days (max	77	104	1978	23
0 C (32 F): Frost days (min	75	201	1984	106
-10 C (14 F): Days with min	75	99	1978	26
-20 C (-4 F): Days with min	75	48	1936	7
-30 C (-22 F): Days with min	44	12	1936	1
-40 C (-40 F): Days with min	1	1	1939	1
20 C (68 F): Tropical nights (min	55	22	1936	8
25 C (77 F): Days with min	5	3	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	81	23	2019	7
25 mm (0.98 in): Days with 25 mm or more rain	75	8	1989	1
50 mm (1.97 in): Days with 50 mm or more rain	28	4	2025	4
10 cm (3.9 in): Days with 10 cm or more snowfall	60	10	2009	1
25 cm (9.8 in): Days with 25 cm or more snowfall	9	2	2009	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.

Download the Data

Data for Bison 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).

Bison Threshold Days by Year (USC00390701)

Key Facts for Bison Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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