Detroit Metro AP Threshold Days by Year (USW00094847)

17 fixed thresholds counted per year at Detroit Metro AP (USW00094847): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Detroit Metro AP Thresholds

Detroit Metro AP: days with a maximum temperature at or above 30 C (86 F) in 68 years, most in 1991 with 59.
Detroit Metro AP: days with a maximum temperature at or above 90 F (32.2 C) in 68 years, most in 1988 with 39.
Detroit Metro AP: days with a maximum temperature at or below 0 C (32 F) in 68 years, most in 1978 with 70.
Detroit Metro AP: nights with a minimum temperature at or below 0 C (32 F) in 68 years, most in 1962 with 155.
17 fixed thresholds have at least one qualifying day at Detroit Metro AP.

Days at or above 30 C (86 F)

68 years with a qualifying day

Days per year at Detroit Metro AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 59 in 1991.

Days at or above 30 C (86 F) per year at Detroit Metro AP
Year	Days	Decade average
1959	41	41
1960	21	27
1961	26	27
1962	35	27
1963	36	27
1964	37	27
1965	23	27
1966	30	27
1967	13	27
1968	26	27
1969	23	27
1970	32	33.9
1971	38	33.9
1972	18	33.9
1973	28	33.9
1974	27	33.9
1975	32	33.9
1976	52	33.9
1977	53	33.9
1978	42	33.9
1979	17	33.9
1980	22	30.5
1981	14	30.5
1982	18	30.5
1983	47	30.5
1984	39	30.5
1985	12	30.5
1986	29	30.5
1987	48	30.5
1988	57	30.5
1989	19	30.5
1990	20	30.6
1991	59	30.6
1992	5	30.6
1993	30	30.6
1994	33	30.6
1995	40	30.6
1996	26	30.6
1997	15	30.6
1998	38	30.6
1999	40	30.6
2000	11	28.5
2001	33	28.5
2002	49	28.5
2003	16	28.5
2004	14	28.5
2005	49	28.5
2006	26	28.5
2007	44	28.5
2008	31	28.5
2009	12	28.5
2010	42	39.9
2011	43	39.9
2012	55	39.9
2013	27	39.9
2014	19	39.9
2015	27	39.9
2016	57	39.9
2017	36	39.9
2018	56	39.9
2019	37	39.9
2020	46	37.3
2021	46	37.3
2022	43	37.3
2023	20	37.3
2024	30	37.3
2025	39	37.3
2026	37	37.3

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

First to last qualifying date each year at Detroit Metro AP
Year	First date	Last date
1959	1959-06-08	1959-09-28
1960	1960-06-04	1960-09-08
1961	1961-06-10	1961-09-13
1962	1962-05-14	1962-10-11
1963	1963-05-08	1963-10-07
1964	1964-05-22	1964-09-10
1965	1965-05-08	1965-09-18
1966	1966-05-27	1966-09-02
1967	1967-06-12	1967-08-17
1968	1968-06-06	1968-09-23
1969	1969-05-28	1969-09-06
1970	1970-06-08	1970-09-21
1971	1971-05-18	1971-10-02
1972	1972-05-21	1972-09-17
1973	1973-06-10	1973-09-27
1974	1974-06-09	1974-09-11
1975	1975-05-19	1975-08-25
1976	1976-06-07	1976-09-14
1977	1977-04-10	1977-09-09
1978	1978-05-26	1978-09-20
1979	1979-05-09	1979-08-30
1980	1980-04-22	1980-09-22
1981	1981-06-14	1981-08-13
1982	1982-05-06	1982-09-14
1983	1983-06-11	1983-09-19
1984	1984-06-05	1984-09-22
1985	1985-07-08	1985-09-08
1986	1986-05-30	1986-09-29
1987	1987-04-21	1987-08-17
1988	1988-05-15	1988-09-18
1989	1989-05-30	1989-09-08
1990	1990-04-25	1990-09-06
1991	1991-05-12	1991-09-16
1992	1992-05-17	1992-08-25
1993	1993-05-11	1993-09-14
1994	1994-04-25	1994-09-16
1995	1995-06-07	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	2000-05-06	2000-09-01
2001	2001-06-13	2001-09-08
2002	2002-04-16	2002-10-01
2003	2003-06-23	2003-08-26
2004	2004-04-18	2004-08-27
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	2009-04-24	2009-08-16
2010	2010-05-26	2010-09-23
2011	2011-05-30	2011-09-03
2012	2012-03-22	2012-09-06
2013	2013-05-20	2013-09-11
2014	2014-05-08	2014-09-05
2015	2015-05-08	2015-09-08
2016	2016-05-25	2016-09-22
2017	2017-05-16	2017-09-26
2018	2018-05-25	2018-10-09
2019	2019-05-25	2019-10-01
2020	2020-05-24	2020-08-27
2021	2021-05-20	2021-09-14
2022	2022-05-12	2022-09-21
2023	2023-05-29	2023-09-05
2024	2024-05-19	2024-09-21
2025	2025-04-29	2025-10-04
2026	2026-05-18	2026-10-13

Every Fixed Threshold

Fixed thresholds at Detroit Metro AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	68	59	1991	37
35 C (95 F): Days	38	18	1988	5
40 C (104 F): Days	1	1	1988	1
90 F (32.2 C): Days	68	39	1988	12
100 F (37.8 C): Days	5	5	1988	3
0 C (32 F): Ice days (max	68	70	1978	33
0 C (32 F): Frost days (min	68	155	1962	73
-10 C (14 F): Days with min	68	58	1963	29
-20 C (-4 F): Days with min	45	12	1963	2
20 C (68 F): Tropical nights (min	67	45	2018	35
25 C (77 F): Days with min	10	2	2006	1
10 mm (0.39 in): Days with 10 mm or more rain	68	43	2011	21
25 mm (0.98 in): Days with 25 mm or more rain	68	13	1965	3
50 mm (1.97 in): Days with 50 mm or more rain	35	4	1987	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1998	1
10 cm (3.9 in): Days with 10 cm or more snowfall	55	6	2008	2
25 cm (9.8 in): Days with 25 cm or more snowfall	9	1	1974	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1959.

Download the Data

Data for Detroit Metro AP 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).

Detroit Metro AP Threshold Days by Year (USW00094847)

Key Facts for Detroit Metro AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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