Ann Arbor U of Mich Threshold Days by Year

18 fixed thresholds counted per year at Ann Arbor U of Mich (USC00200230): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ann Arbor U of Mich Thresholds

Ann Arbor U of Mich: days with a maximum temperature at or above 30 C (86 F) in 132 years, most in 1988 with 62.
Ann Arbor U of Mich: days with a maximum temperature at or below 0 C (32 F) in 132 years, most in 1904 with 83.
Ann Arbor U of Mich: nights with a minimum temperature at or below 0 C (32 F) in 132 years, most in 1907 with 168.
Ann Arbor U of Mich: nights with a minimum temperature at or below -10 C (14 F) in 132 years, most in 1895 with 69.
18 fixed thresholds have at least one qualifying day at Ann Arbor U of Mich.

Days at or above 30 C (86 F)

132 years with a qualifying day

Days per year at Ann Arbor U of Mich with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 62 in 1988.

Days at or above 30 C (86 F) per year at Ann Arbor U of Mich
Year	Days	Decade average
1892	23	37.4
1893	17	37.4
1894	37	37.4
1895	47	37.4
1896	24	37.4
1897	45	37.4
1898	52	37.4
1899	54	37.4
1900	52	29.8
1901	50	29.8
1902	17	29.8
1903	21	29.8
1904	20	29.8
1905	23	29.8
1906	38	29.8
1907	17	29.8
1908	37	29.8
1909	23	29.8
1910	36	28.5
1911	38	28.5
1912	24	28.5
1913	41	28.5
1914	34	28.5
1915	9	28.5
1916	31	28.5
1917	11	28.5
1918	31	28.5
1919	30	28.5
1920	18	21.2
1921	37	21.2
1922	23	21.2
1923	19	21.2
1924	14	21.2
1925	34	21.2
1926	12	21.2
1927	14	21.2
1928	13	21.2
1929	28	21.2
1930	37	39.6
1931	49	39.6
1932	24	39.6
1933	49	39.6
1934	58	39.6
1935	23	39.6
1936	46	39.6
1937	30	39.6
1938	33	39.6
1939	47	39.6
1940	28	29.5
1941	43	29.5
1942	22	29.5
1943	26	29.5
1944	46	29.5
1945	20	29.5
1946	18	29.5
1947	26	29.5
1948	25	29.5
1949	41	29.5
1950	26	32.2
1951	12	32.2
1952	50	32.2
1953	41	32.2
1954	30	32.2
1956	33	32.2
1957	29	32.2
1958	18	32.2
1959	51	32.2
1960	23	35.5
1962	42	35.5
1963	42	35.5
1964	46	35.5
1966	50	35.5
1967	18	35.5
1968	32	35.5
1969	31	35.5
1970	37	30.5
1971	47	30.5
1972	26	30.5
1973	31	30.5
1974	23	30.5
1975	34	30.5
1976	37	30.5
1977	26	30.5
1978	33	30.5
1979	11	30.5
1980	25	30.1
1981	14	30.1
1982	14	30.1
1983	50	30.1
1984	38	30.1
1985	14	30.1
1986	17	30.1
1987	48	30.1
1988	62	30.1
1989	19	30.1
1990	24	29.1
1991	50	29.1
1992	8	29.1
1993	21	29.1
1994	24	29.1
1995	35	29.1
1996	23	29.1
1997	17	29.1
1998	44	29.1
1999	45	29.1
2000	11	29.4
2001	39	29.4
2002	49	29.4
2003	20	29.4
2004	14	29.4
2005	50	29.4
2006	20	29.4
2007	52	29.4
2008	30	29.4
2009	9	29.4
2010	43	37.1
2011	45	37.1
2012	59	37.1
2013	24	37.1
2014	14	37.1
2015	23	37.1
2016	53	37.1
2017	38	37.1
2018	44	37.1
2019	28	37.1
2020	48	36.3
2021	44	36.3
2022	35	36.3
2023	24	36.3
2024	31	36.3
2025	36	36.3
2026	36	36.3

For each year, a bar from the first to the last day at Ann Arbor U of Mich meeting 30 C (86 F).

First to last qualifying date each year at Ann Arbor U of Mich
Year	First date	Last date
1892	1892-06-12	1892-08-24
1893	1893-06-19	1893-09-05
1894	1894-06-10	1894-09-04
1895	1895-05-04	1895-09-22
1896	1896-04-18	1896-08-11
1897	1897-06-13	1897-10-15
1898	1898-06-05	1898-10-03
1899	1899-04-29	1899-09-17
1900	1900-05-14	1900-10-05
1901	1901-06-05	1901-09-07
1902	1902-05-19	1902-08-30
1903	1903-05-15	1903-09-15
1904	1904-05-25	1904-09-11
1905	1905-06-15	1905-09-29
1906	1906-05-17	1906-09-21
1907	1907-05-15	1907-09-19
1908	1908-05-25	1908-09-27
1909	1909-06-28	1909-09-14
1910	1910-06-15	1910-08-30
1911	1911-05-15	1911-09-02
1912	1912-06-26	1912-09-10
1913	1913-06-06	1913-09-07
1914	1914-05-25	1914-09-22
1915	1915-04-25	1915-09-16
1916	1916-07-02	1916-09-07
1917	1917-06-26	1917-08-20
1918	1918-05-26	1918-08-25
1919	1919-05-31	1919-09-08
1920	1920-06-10	1920-09-26
1921	1921-05-20	1921-09-01
1922	1922-06-07	1922-10-05
1923	1923-06-01	1923-08-01
1924	1924-06-19	1924-08-31
1925	1925-04-23	1925-09-09
1926	1926-05-08	1926-08-28
1927	1927-05-22	1927-09-17
1928	1928-07-03	1928-09-11
1929	1929-05-29	1929-09-05
1930	1930-05-09	1930-09-14
1931	1931-05-18	1931-09-21
1932	1932-05-15	1932-09-01
1933	1933-05-24	1933-09-09
1934	1934-05-19	1934-09-21
1935	1935-07-04	1935-09-25
1936	1936-05-09	1936-09-23
1937	1937-05-31	1937-09-23
1938	1938-05-03	1938-09-12
1939	1939-05-19	1939-10-08
1940	1940-06-03	1940-09-20
1941	1941-05-21	1941-09-22
1942	1942-05-01	1942-09-14
1943	1943-06-12	1943-09-01
1944	1944-05-26	1944-09-03
1945	1945-06-14	1945-09-07
1946	1946-06-16	1946-10-07
1947	1947-06-10	1947-09-19
1948	1948-06-03	1948-09-19
1949	1949-05-04	1949-10-10
1950	1950-05-05	1950-08-28
1951	1951-05-16	1951-10-04
1952	1952-05-04	1952-09-13
1953	1953-05-30	1953-10-03
1954	1954-06-09	1954-09-06
1956	1956-05-12	1956-09-06
1957	1957-06-16	1957-09-02
1958	1958-06-30	1958-09-04
1959	1959-05-06	1959-09-09
1960	1960-06-04	1960-09-09
1962	1962-05-14	1962-09-13
1963	1963-05-09	1963-10-07
1964	1964-05-22	1964-09-11
1966	1966-05-27	1966-09-03
1967	1967-06-10	1967-08-02
1968	1968-06-07	1968-08-25
1969	1969-05-28	1969-09-06
1970	1970-06-08	1970-09-22
1971	1971-05-18	1971-10-02
1972	1972-05-18	1972-09-17
1973	1973-06-09	1973-09-05
1974	1974-07-01	1974-08-27
1975	1975-05-19	1975-08-25
1976	1976-06-07	1976-09-09
1977	1977-05-16	1977-08-28
1978	1978-05-28	1978-09-21
1979	1979-05-11	1979-08-08
1980	1980-04-22	1980-09-23
1981	1981-06-15	1981-07-19
1982	1982-05-18	1982-09-14
1983	1983-06-11	1983-09-19
1984	1984-06-05	1984-09-03
1985	1985-06-08	1985-09-09
1986	1986-05-31	1986-08-17
1987	1987-05-27	1987-08-17
1988	1988-05-15	1988-08-18
1989	1989-06-23	1989-08-05
1990	1990-04-25	1990-09-06
1991	1991-05-12	1991-09-16
1992	1992-05-22	1992-08-25
1993	1993-06-17	1993-08-30
1994	1994-05-22	1994-09-16
1995	1995-06-06	1995-09-06
1996	1996-05-18	1996-09-04
1997	1997-06-20	1997-08-16
1998	1998-05-15	1998-09-27
1999	1999-05-17	1999-09-27
2000	2000-06-01	2000-09-02
2001	2001-06-13	2001-09-08
2002	2002-06-01	2002-09-19
2003	2003-06-23	2003-08-26
2004	2004-06-08	2004-09-22
2005	2005-06-05	2005-09-22
2006	2006-05-28	2006-08-07
2007	2007-05-15	2007-10-08
2008	2008-05-26	2008-09-03
2009	2009-06-23	2009-08-17
2010	2010-05-26	2010-09-23
2011	2011-05-22	2011-09-03
2012	2012-05-03	2012-09-06
2013	2013-05-20	2013-09-12
2014	2014-05-08	2014-09-06
2015	2015-05-08	2015-09-08
2016	2016-05-25	2016-09-22
2017	2017-05-16	2017-09-27
2018	2018-05-25	2018-09-18
2019	2019-06-27	2019-10-01
2020	2020-05-24	2020-08-28
2021	2021-05-20	2021-09-17
2022	2022-05-12	2022-09-21
2023	2023-05-29	2023-09-06
2024	2024-05-19	2024-09-21
2025	2025-06-03	2025-10-04
2026	2026-05-17	2026-09-03

Every Fixed Threshold

Fixed thresholds at Ann Arbor U of Mich
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	132	62	1988	36
35 C (95 F): Days	71	15	1988	1
40 C (104 F): Days	2	1	1918	1
90 F (32.2 C): Days	130	40	1988	12
100 F (37.8 C): Days	11	7	1936	4
0 C (32 F): Ice days (max	132	83	1904	35
0 C (32 F): Frost days (min	132	168	1907	85
-10 C (14 F): Days with min	132	69	1895	29
-20 C (-4 F): Days with min	90	13	1904	6
-30 C (-22 F): Days with min	1	1	1994	1
20 C (68 F): Tropical nights (min	132	31	2002	11
25 C (77 F): Days with min	28	2	1914	1
10 mm (0.39 in): Days with 10 mm or more rain	127	47	2006	27
25 mm (0.98 in): Days with 25 mm or more rain	126	14	1917	7
50 mm (1.97 in): Days with 50 mm or more rain	52	4	1968	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1971	1
10 cm (3.9 in): Days with 10 cm or more snowfall	69	7	1923	1
25 cm (9.8 in): Days with 25 cm or more snowfall	8	2	1931	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1892.

Download the Data

Data for Ann Arbor U of Mich 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).

Ann Arbor U of Mich Threshold Days by Year

Key Facts for Ann Arbor U of Mich Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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