Port Huron Threshold Days by Year (USC00206680)

16 fixed thresholds counted per year at Port Huron (USC00206680): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Port Huron Thresholds

Port Huron: days with a maximum temperature at or above 30 C (86 F) in 85 years, most in 1955 with 57.
Port Huron: days with a maximum temperature at or above 90 F (32.2 C) in 85 years, most in 1988 with 40.
Port Huron: days with a maximum temperature at or below 0 C (32 F) in 85 years, most in 1940 with 78.
Port Huron: nights with a minimum temperature at or below 0 C (32 F) in 85 years, most in 1944 with 168.
16 fixed thresholds have at least one qualifying day at Port Huron.

Days at or above 30 C (86 F)

85 years with a qualifying day

Days per year at Port Huron with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 57 in 1955.

Days at or above 30 C (86 F) per year at Port Huron
Year	Days	Decade average
1934	33	29.5
1938	26	29.5
1940	22	30.1
1941	39	30.1
1942	16	30.1
1943	23	30.1
1944	39	30.1
1945	20	30.1
1948	29	30.1
1949	53	30.1
1950	24	34.2
1951	27	34.2
1952	47	34.2
1953	40	34.2
1954	38	34.2
1955	57	34.2
1956	19	34.2
1957	21	34.2
1958	22	34.2
1959	47	34.2
1960	21	30.5
1961	31	30.5
1962	28	30.5
1963	33	30.5
1964	41	30.5
1965	23	30.5
1966	38	30.5
1967	23	30.5
1968	35	30.5
1969	32	30.5
1970	31	24.8
1971	35	24.8
1972	17	24.8
1973	31	24.8
1974	19	24.8
1975	24	24.8
1976	22	24.8
1977	21	24.8
1978	31	24.8
1979	17	24.8
1980	23	26.8
1981	15	26.8
1982	16	26.8
1983	36	26.8
1984	23	26.8
1985	19	26.8
1986	16	26.8
1987	42	26.8
1988	48	26.8
1989	30	26.8
1990	23	28.1
1991	44	28.1
1992	6	28.1
1993	24	28.1
1994	22	28.1
1995	34	28.1
1996	31	28.1
1997	26	28.1
1998	43	28.1
2000	11	21.6
2001	27	21.6
2002	42	21.6
2003	20	21.6
2004	9	21.6
2005	30	21.6
2006	26	21.6
2007	29	21.6
2008	16	21.6
2009	6	21.6
2010	32	26.9
2011	24	26.9
2012	36	26.9
2013	21	26.9
2015	22	26.9
2016	37	26.9
2017	23	26.9
2018	29	26.9
2019	18	26.9
2020	37	23.9
2021	28	23.9
2022	30	23.9
2023	12	23.9
2024	20	23.9
2025	23	23.9
2026	17	23.9

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

First to last qualifying date each year at Port Huron
Year	First date	Last date
1934	1934-05-05	1934-08-18
1938	1938-06-22	1938-08-29
1940	1940-06-03	1940-09-20
1941	1941-04-13	1941-09-22
1942	1942-05-30	1942-09-17
1943	1943-06-03	1943-09-04
1944	1944-05-27	1944-09-19
1945	1945-06-14	1945-09-08
1948	1948-06-03	1948-09-19
1949	1949-05-04	1949-10-09
1950	1950-06-07	1950-08-28
1951	1951-05-15	1951-10-05
1952	1952-06-06	1952-10-01
1953	1953-05-09	1953-10-19
1954	1954-06-09	1954-09-07
1955	1955-05-03	1955-09-20
1956	1956-05-30	1956-08-31
1957	1957-06-16	1957-09-02
1958	1958-06-30	1958-09-15
1959	1959-05-06	1959-09-23
1960	1960-04-24	1960-09-09
1961	1961-06-12	1961-09-14
1962	1962-04-26	1962-09-13
1963	1963-05-08	1963-10-07
1964	1964-05-22	1964-09-11
1965	1965-05-08	1965-09-20
1966	1966-05-27	1966-09-02
1967	1967-06-05	1967-08-26
1968	1968-06-05	1968-09-04
1969	1969-05-28	1969-09-06
1970	1970-05-21	1970-09-21
1971	1971-05-18	1971-10-02
1972	1972-06-08	1972-09-01
1973	1973-06-10	1973-09-04
1974	1974-06-04	1974-08-26
1975	1975-05-19	1975-08-14
1976	1976-06-08	1976-09-08
1977	1977-05-18	1977-08-28
1978	1978-05-19	1978-09-20
1979	1979-05-09	1979-09-01
1980	1980-05-05	1980-08-30
1981	1981-06-15	1981-08-13
1982	1982-05-18	1982-09-13
1983	1983-06-11	1983-09-10
1984	1984-06-06	1984-08-15
1985	1985-05-31	1985-09-07
1986	1986-05-29	1986-08-17
1987	1987-05-22	1987-09-08
1988	1988-05-28	1988-09-18
1989	1989-06-24	1989-09-08
1990	1990-04-25	1990-09-01
1991	1991-05-12	1991-09-16
1992	1992-05-17	1992-08-25
1993	1993-06-17	1993-08-30
1994	1994-05-22	1994-09-13
1995	1995-06-16	1995-09-06
1996	1996-05-18	1996-09-03
1997	1997-06-10	1997-08-16
1998	1998-05-14	1998-09-27
2000	2000-05-05	2000-09-09
2001	2001-05-03	2001-09-07
2002	2002-06-01	2002-09-19
2003	2003-06-23	2003-09-17
2004	2004-05-10	2004-08-27
2005	2005-06-05	2005-09-13
2006	2006-05-28	2006-08-06
2007	2007-05-15	2007-10-08
2008	2008-06-06	2008-09-03
2009	2009-06-24	2009-08-18
2010	2010-05-30	2010-09-07
2011	2011-05-30	2011-09-03
2012	2012-05-03	2012-08-31
2013	2013-05-20	2013-09-11
2015	2015-06-10	2015-09-08
2016	2016-05-25	2016-09-07
2017	2017-05-18	2017-09-26
2018	2018-05-28	2018-09-17
2019	2019-07-01	2019-09-21
2020	2020-05-25	2020-08-27
2021	2021-05-21	2021-08-30
2022	2022-05-30	2022-09-18
2023	2023-05-30	2023-09-05
2024	2024-05-22	2024-09-21
2025	2025-06-11	2025-10-04
2026	2026-06-10	2026-09-02

Every Fixed Threshold

Fixed thresholds at Port Huron
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	85	57	1955	17
35 C (95 F): Days	50	18	1988	2
90 F (32.2 C): Days	85	40	1988	8
100 F (37.8 C): Days	11	4	1934	1
0 C (32 F): Ice days (max	85	78	1940	39
0 C (32 F): Frost days (min	85	168	1944	77
-10 C (14 F): Days with min	85	61	1989	34
-20 C (-4 F): Days with min	45	7	1951	2
20 C (68 F): Tropical nights (min	84	54	2016	19
25 C (77 F): Days with min	11	2	2006	1
10 mm (0.39 in): Days with 10 mm or more rain	85	39	1961	23
25 mm (0.98 in): Days with 25 mm or more rain	84	13	1950	5
50 mm (1.97 in): Days with 50 mm or more rain	40	3	1962	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1996	1
10 cm (3.9 in): Days with 10 cm or more snowfall	66	8	1965	1
25 cm (9.8 in): Days with 25 cm or more snowfall	10	2	1960	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1934.

Download the Data

Data for Port Huron 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).

Port Huron Threshold Days by Year (USC00206680)

Key Facts for Port Huron Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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