Hysham Threshold Days by Year (USC00244358)

18 fixed thresholds counted per year at Hysham (USC00244358): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hysham Thresholds

Hysham: days with 10 mm (0.39 in) or more of precipitation in 78 years, most in 1975 with 20.
Hysham: nights with a minimum temperature at or below 0 C (32 F) in 77 years, most in 1961 with 194.
Hysham: nights with a minimum temperature at or below -10 C (14 F) in 77 years, most in 1978 with 97.
Hysham: nights with a minimum temperature at or below -20 C (-4 F) in 77 years, most in 1949 with 47.
18 fixed thresholds have at least one qualifying day at Hysham.

Days at or above 30 C (86 F)

74 years with a qualifying day

Days per year at Hysham with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 86 in 1952.

Days at or above 30 C (86 F) per year at Hysham
Year	Days	Decade average
1946	53	60.3
1947	62	60.3
1948	61	60.3
1949	65	60.3
1950	42	63.6
1951	46	63.6
1952	86	63.6
1953	80	63.6
1954	68	63.6
1955	70	63.6
1956	64	63.6
1957	54	63.6
1958	62	63.6
1960	76	69.5
1961	80	69.5
1962	59	69.5
1963	66	69.5
1965	46	69.5
1966	81	69.5
1967	75	69.5
1969	73	69.5
1970	79	60.5
1971	68	60.5
1972	52	60.5
1973	63	60.5
1974	55	60.5
1975	45	60.5
1976	64	60.5
1977	61	60.5
1978	50	60.5
1979	68	60.5
1980	70	63.3
1981	73	63.3
1982	54	63.3
1983	69	63.3
1984	74	63.3
1985	59	63.3
1986	54	63.3
1989	53	63.3
1990	61	45.1
1991	49	45.1
1992	35	45.1
1993	18	45.1
1994	49	45.1
1995	41	45.1
1996	47	45.1
1997	45	45.1
1998	60	45.1
1999	46	45.1
2000	56	55.6
2001	63	55.6
2002	54	55.6
2003	61	55.6
2004	37	55.6
2005	52	55.6
2006	66	55.6
2007	67	55.6
2008	44	55.6
2011	54	52.9
2012	68	52.9
2013	55	52.9
2014	44	52.9
2015	60	52.9
2016	49	52.9
2017	62	52.9
2018	40	52.9
2019	44	52.9
2020	64	65.9
2021	84	65.9
2022	72	65.9
2023	62	65.9
2024	50	65.9
2025	62	65.9
2026	67	65.9

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

First to last qualifying date each year at Hysham
Year	First date	Last date
1946	1946-04-26	1946-09-15
1947	1947-06-19	1947-10-19
1948	1948-04-29	1948-10-03
1949	1949-04-19	1949-09-24
1950	1950-06-05	1950-09-06
1951	1951-05-22	1951-09-10
1952	1952-04-25	1952-09-29
1953	1953-05-07	1953-10-10
1954	1954-05-19	1954-09-26
1955	1955-05-01	1955-10-10
1956	1956-05-17	1956-09-26
1957	1957-06-03	1957-09-28
1958	1958-05-11	1958-10-14
1960	1960-05-11	1960-10-07
1961	1961-05-21	1961-09-01
1962	1962-04-19	1962-09-30
1963	1963-06-13	1963-10-05
1965	1965-05-31	1965-10-09
1966	1966-05-04	1966-09-23
1967	1967-05-18	1967-09-30
1969	1969-05-13	1969-09-18
1970	1970-05-06	1970-10-04
1971	1971-06-13	1971-09-11
1972	1972-05-14	1972-08-30
1973	1973-05-15	1973-09-30
1974	1974-04-25	1974-10-02
1975	1975-05-15	1975-10-03
1976	1976-05-28	1976-10-02
1977	1977-04-26	1977-09-14
1978	1978-05-14	1978-09-25
1979	1979-05-24	1979-10-04
1980	1980-04-19	1980-10-09
1981	1981-04-24	1981-10-02
1982	1982-06-20	1982-09-09
1983	1983-05-25	1983-09-26
1984	1984-05-14	1984-09-20
1985	1985-04-29	1985-09-14
1986	1986-05-03	1986-08-31
1989	1989-05-18	1989-09-30
1990	1990-05-06	1990-09-25
1991	1991-06-10	1991-10-16
1992	1992-05-06	1992-10-04
1993	1993-05-11	1993-08-21
1994	1994-04-17	1994-09-09
1995	1995-06-12	1995-09-04
1996	1996-06-07	1996-09-13
1997	1997-05-31	1997-10-02
1998	1998-05-26	1998-09-17
1999	1999-05-28	1999-09-23
2000	2000-06-06	2000-09-17
2001	2001-05-12	2001-09-28
2002	2002-05-21	2002-09-17
2003	2003-05-25	2003-09-07
2004	2004-06-03	2004-10-09
2005	2005-06-17	2005-10-01
2006	2006-05-17	2006-09-13
2007	2007-05-17	2007-09-16
2008	2008-05-18	2008-09-20
2011	2011-06-23	2011-10-02
2012	2012-04-23	2012-09-10
2013	2013-05-12	2013-09-07
2014	2014-05-23	2014-09-25
2015	2015-06-08	2015-10-10
2016	2016-05-05	2016-09-01
2017	2017-05-05	2017-09-12
2018	2018-05-26	2018-09-08
2019	2019-06-03	2019-09-17
2020	2020-06-01	2020-10-11
2021	2021-05-01	2021-10-07
2022	2022-06-12	2022-09-30
2023	2023-04-13	2023-09-28
2024	2024-06-13	2024-10-05
2025	2025-05-05	2025-10-01
2026	2026-04-23	2026-09-19

Every Fixed Threshold

Fixed thresholds at Hysham
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	74	86	1952	67
35 C (95 F): Days	73	48	1970	22
40 C (104 F): Days	25	5	1983	4
90 F (32.2 C): Days	74	68	1961	48
100 F (37.8 C): Days	58	18	1983	6
110 F (43.3 C): Days	1	1	1947	1
0 C (32 F): Ice days (max	74	79	1978	10
0 C (32 F): Frost days (min	77	194	1961	93
-10 C (14 F): Days with min	77	97	1978	28
-20 C (-4 F): Days with min	77	47	1949	10
-30 C (-22 F): Days with min	59	15	1985	2
-40 C (-40 F): Days with min	5	1	1954	1
20 C (68 F): Tropical nights (min	36	10	2012	7
10 mm (0.39 in): Days with 10 mm or more rain	78	20	1975	11
25 mm (0.98 in): Days with 25 mm or more rain	58	6	1993	3
50 mm (1.97 in): Days with 50 mm or more rain	11	2	2014	1
10 cm (3.9 in): Days with 10 cm or more snowfall	55	9	1978	1
25 cm (9.8 in): Days with 25 cm or more snowfall	6	2	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 1946.

Download the Data

Data for Hysham 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).

Hysham Threshold Days by Year (USC00244358)

Key Facts for Hysham Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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