Pontiac Threshold Days by Year (USC00116910)

18 fixed thresholds counted per year at Pontiac (USC00116910): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Pontiac Thresholds

Pontiac: days with a maximum temperature at or above 30 C (86 F) in 111 years, most in 1934 with 93.
Pontiac: days with a maximum temperature at or above 90 F (32.2 C) in 111 years, most in 1934 with 72.
Pontiac: days with a maximum temperature at or below 0 C (32 F) in 111 years, most in 1978 with 68.
Pontiac: nights with a minimum temperature at or below 0 C (32 F) in 110 years, most in 1988 with 152.
18 fixed thresholds have at least one qualifying day at Pontiac.

Days at or above 30 C (86 F)

111 years with a qualifying day

Days per year at Pontiac with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 93 in 1934.

Days at or above 30 C (86 F) per year at Pontiac
Year	Days	Decade average
1903	25	49.4
1904	24	49.4
1905	45	49.4
1906	74	49.4
1907	36	49.4
1908	75	49.4
1909	67	49.4
1910	65	65
1911	78	65
1912	58	65
1913	78	65
1914	84	65
1915	36	65
1916	71	65
1917	44	65
1918	59	65
1919	77	65
1920	72	66.3
1921	92	66.3
1922	84	66.3
1923	67	66.3
1924	39	66.3
1925	84	66.3
1926	59	66.3
1927	48	66.3
1928	60	66.3
1929	58	66.3
1930	88	78.8
1931	83	78.8
1932	78	78.8
1933	92	78.8
1934	93	78.8
1935	62	78.8
1936	93	78.8
1937	69	78.8
1938	57	78.8
1939	73	78.8
1940	68	51.9
1941	78	51.9
1942	59	51.9
1943	51	51.9
1944	64	51.9
1945	36	51.9
1946	33	51.9
1947	52	51.9
1948	38	51.9
1949	40	51.9
1950	14	37.1
1951	12	37.1
1952	51	37.1
1953	58	37.1
1954	54	37.1
1955	58	37.1
1956	34	37.1
1957	27	37.1
1958	15	37.1
1959	48	37.1
1960	25	55.7
1962	70	55.7
1963	68	55.7
1964	74	55.7
1965	55	55.7
1966	65	55.7
1967	41	55.7
1968	55	55.7
1969	48	55.7
1970	59	54.1
1971	74	54.1
1972	58	54.1
1973	58	54.1
1974	38	54.1
1975	53	54.1
1976	44	54.1
1977	52	54.1
1978	59	54.1
1979	46	54.1
1980	75	47.4
1981	17	47.4
1982	21	47.4
1983	63	47.4
1986	38	47.4
1987	63	47.4
1988	77	47.4
1989	25	47.4
1990	28	37.1
1991	61	37.1
1992	21	37.1
1993	30	37.1
1994	46	37.1
1995	47	37.1
1996	31	37.1
1997	33	37.1
1998	36	37.1
1999	38	37.1
2000	31	36.7
2001	37	36.7
2002	56	36.7
2003	28	36.7
2004	24	36.7
2005	66	36.7
2006	35	36.7
2007	55	36.7
2008	22	36.7
2009	13	36.7
2010	54	45
2011	48	45
2012	59	45
2013	38	45
2014	37	45
2015	30	45
2016	49	45

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

First to last qualifying date each year at Pontiac
Year	First date	Last date
1903	1903-06-29	1903-09-14
1904	1904-05-24	1904-09-11
1905	1905-06-04	1905-09-29
1906	1906-05-16	1906-09-21
1907	1907-06-16	1907-09-19
1908	1908-05-16	1908-09-26
1909	1909-05-05	1909-09-20
1910	1910-03-23	1910-09-07
1911	1911-05-09	1911-09-16
1912	1912-05-21	1912-10-06
1913	1913-05-02	1913-09-07
1914	1914-05-10	1914-09-21
1915	1915-04-20	1915-09-16
1916	1916-05-07	1916-10-07
1917	1917-05-17	1917-09-19
1918	1918-05-04	1918-08-29
1919	1919-05-29	1919-10-04
1920	1920-05-26	1920-10-11
1921	1921-05-18	1921-09-29
1922	1922-05-10	1922-10-05
1923	1923-05-01	1923-09-05
1924	1924-05-05	1924-09-21
1925	1925-04-22	1925-09-20
1926	1926-04-30	1926-10-03
1927	1927-05-21	1927-09-18
1928	1928-05-02	1928-10-11
1929	1929-05-28	1929-09-28
1930	1930-04-10	1930-10-12
1931	1931-05-16	1931-10-06
1932	1932-05-14	1932-09-19
1933	1933-05-23	1933-09-30
1934	1934-05-06	1934-09-26
1935	1935-04-26	1935-09-25
1936	1936-04-20	1936-09-23
1937	1937-05-29	1937-10-01
1938	1938-05-02	1938-10-17
1939	1939-05-22	1939-10-08
1940	1940-05-13	1940-10-05
1941	1941-04-13	1941-09-24
1942	1942-04-29	1942-09-18
1943	1943-05-05	1943-09-04
1944	1944-05-15	1944-09-04
1945	1945-06-23	1945-09-23
1946	1946-06-07	1946-09-09
1947	1947-05-15	1947-09-20
1948	1948-05-28	1948-09-20
1949	1949-05-03	1949-08-26
1950	1950-05-24	1950-08-17
1951	1951-05-18	1951-10-04
1952	1952-04-28	1952-09-30
1953	1953-05-25	1953-10-02
1954	1954-06-10	1954-10-03
1955	1955-05-03	1955-09-19
1956	1956-05-12	1956-09-22
1957	1957-06-16	1957-09-01
1958	1958-05-31	1958-09-24
1959	1959-05-02	1959-09-22
1960	1960-05-15	1960-09-09
1962	1962-04-26	1962-10-12
1963	1963-05-08	1963-10-22
1964	1964-05-16	1964-09-21
1965	1965-05-04	1965-09-20
1966	1966-05-23	1966-09-10
1967	1967-05-24	1967-10-04
1968	1968-05-02	1968-09-23
1969	1969-05-03	1969-09-01
1970	1970-04-29	1970-09-22
1971	1971-05-16	1971-10-02
1972	1972-05-18	1972-09-21
1973	1973-06-08	1973-09-26
1974	1974-05-21	1974-08-27
1975	1975-05-18	1975-10-13
1976	1976-06-07	1976-10-03
1977	1977-04-16	1977-09-08
1978	1978-05-26	1978-09-20
1979	1979-05-08	1979-09-12
1980	1980-04-22	1980-10-08
1981	1981-04-28	1981-09-14
1982	1982-05-06	1982-09-12
1983	1983-06-11	1983-09-20
1986	1986-03-30	1986-09-26
1987	1987-04-21	1987-09-28
1988	1988-05-15	1988-09-23
1989	1989-04-26	1989-08-28
1990	1990-04-25	1990-10-06
1991	1991-05-14	1991-09-16
1992	1992-05-02	1992-09-17
1993	1993-05-09	1993-08-31
1994	1994-04-27	1994-10-01
1995	1995-06-08	1995-09-06
1996	1996-05-18	1996-08-23
1997	1997-06-19	1997-10-07
1998	1998-05-15	1998-09-28
1999	1999-06-06	1999-09-26
2000	2000-05-13	2000-09-20
2001	2001-05-01	2001-09-08
2002	2002-04-16	2002-10-03
2003	2003-04-16	2003-10-21
2004	2004-04-18	2004-09-24
2005	2005-05-09	2005-10-05
2006	2006-05-25	2006-10-04
2007	2007-05-01	2007-10-09
2008	2008-06-03	2008-09-03
2009	2009-06-20	2009-09-16
2010	2010-05-24	2010-10-10
2011	2011-05-11	2011-09-04
2012	2012-05-07	2012-09-05
2013	2013-05-15	2013-09-29
2014	2014-05-08	2014-09-06
2015	2015-05-07	2015-09-19
2016	2016-04-19	2016-10-18

Every Fixed Threshold

Fixed thresholds at Pontiac
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	111	93	1934	49
35 C (95 F): Days	90	40	1936	1
40 C (104 F): Days	9	10	1936	2
90 F (32.2 C): Days	111	72	1934	15
100 F (37.8 C): Days	28	23	1936	2
0 C (32 F): Ice days (max	111	68	1978	36
0 C (32 F): Frost days (min	110	152	1988	107
-10 C (14 F): Days with min	110	56	1963	23
-20 C (-4 F): Days with min	92	23	1963	1
-30 C (-22 F): Days with min	5	1	1905	1
20 C (68 F): Tropical nights (min	110	55	1921	44
25 C (77 F): Days with min	43	11	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	110	45	1990	30
25 mm (0.98 in): Days with 25 mm or more rain	110	15	2007	11
50 mm (1.97 in): Days with 50 mm or more rain	76	5	2014	1
100 mm (3.94 in): Days with 100 mm or more rain	10	1	1911	1
10 cm (3.9 in): Days with 10 cm or more snowfall	93	6	1907	3
25 cm (9.8 in): Days with 25 cm or more snowfall	7	1	1909	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1903.

Download the Data

Data for Pontiac 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).

Pontiac Threshold Days by Year (USC00116910)

Key Facts for Pontiac Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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