Detroit City AP Threshold Days by Year (USW00014822)

16 fixed thresholds counted per year at Detroit City AP (USW00014822): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Detroit City AP Thresholds

Detroit City AP: days with a maximum temperature at or above 30 C (86 F) in 77 years, most in 1998 with 58.
Detroit City AP: days with a maximum temperature at or above 90 F (32.2 C) in 77 years, most in 1988 with 38.
Detroit City AP: days with a maximum temperature at or below 0 C (32 F) in 77 years, most in 1978 with 71.
Detroit City AP: nights with a minimum temperature at or below 0 C (32 F) in 77 years, most in 2018 with 139.
16 fixed thresholds have at least one qualifying day at Detroit City AP.

Days at or above 30 C (86 F)

77 years with a qualifying day

Days per year at Detroit City AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 1998.

Days at or above 30 C (86 F) per year at Detroit City AP
Year	Days	Decade average
1948	29	37.5
1949	46	37.5
1950	21	33.9
1951	25	33.9
1952	52	33.9
1953	40	33.9
1954	35	33.9
1955	55	33.9
1956	22	33.9
1957	23	33.9
1958	18	33.9
1959	48	33.9
1960	24	30.1
1961	29	30.1
1962	22	30.1
1963	43	30.1
1964	39	30.1
1965	27	30.1
1966	39	30.1
1967	20	30.1
1968	33	30.1
1969	25	30.1
1970	39	31.1
1971	40	31.1
1972	18	31.1
1973	29	31.1
1974	29	31.1
1975	36	31.1
1976	35	31.1
1977	39	31.1
1978	35	31.1
1979	11	31.1
1980	24	31.9
1981	16	31.9
1982	28	31.9
1983	50	31.9
1984	36	31.9
1985	13	31.9
1986	34	31.9
1987	41	31.9
1988	53	31.9
1989	24	31.9
1990	21	34
1991	48	34
1992	6	34
1993	23	34
1994	24	34
1995	38	34
1996	37	34
1997	32	34
1998	58	34
1999	53	34
2000	18	29
2001	31	29
2002	46	29
2003	17	29
2004	12	29
2005	55	29
2006	28	29
2007	46	29
2008	27	29
2009	10	29
2010	40	36.6
2011	36	36.6
2012	47	36.6
2015	23	36.6
2016	41	36.6
2017	29	36.6
2018	41	36.6
2019	36	36.6
2020	41	42.1
2021	56	42.1
2022	50	42.1
2023	32	42.1
2024	41	42.1
2025	39	42.1
2026	36	42.1

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

First to last qualifying date each year at Detroit City AP
Year	First date	Last date
1948	1948-06-03	1948-09-19
1949	1949-05-04	1949-10-09
1950	1950-06-07	1950-08-28
1951	1951-05-16	1951-10-05
1952	1952-05-05	1952-10-01
1953	1953-05-09	1953-10-03
1954	1954-06-09	1954-09-07
1955	1955-05-03	1955-09-19
1956	1956-05-22	1956-09-04
1957	1957-06-16	1957-09-02
1958	1958-06-30	1958-09-04
1959	1959-05-06	1959-09-23
1960	1960-04-23	1960-09-08
1961	1961-06-10	1961-09-13
1962	1962-05-14	1962-09-13
1963	1963-05-08	1963-10-07
1964	1964-05-22	1964-09-10
1965	1965-05-08	1965-09-21
1966	1966-05-27	1966-09-02
1967	1967-06-05	1967-10-04
1968	1968-06-06	1968-09-23
1969	1969-05-28	1969-09-15
1970	1970-05-19	1970-09-21
1971	1971-05-18	1971-09-08
1972	1972-05-29	1972-09-17
1973	1973-06-09	1973-09-04
1974	1974-06-04	1974-09-11
1975	1975-05-19	1975-08-25
1976	1976-06-07	1976-09-12
1977	1977-04-11	1977-09-09
1978	1978-05-27	1978-09-20
1979	1979-05-11	1979-08-07
1980	1980-04-22	1980-09-22
1981	1981-06-05	1981-08-13
1982	1982-05-06	1982-09-14
1983	1983-06-11	1983-09-18
1984	1984-06-05	1984-09-22
1985	1985-07-08	1985-09-08
1986	1986-04-28	1986-09-29
1987	1987-05-11	1987-08-17
1988	1988-05-15	1988-09-18
1989	1989-06-07	1989-09-09
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	1995-06-17	1995-09-06
1996	1996-05-18	1996-09-08
1997	1997-06-10	1997-10-07
1998	1998-05-15	1998-09-27
1999	1999-05-17	1999-09-27
2000	2000-05-06	2000-09-03
2001	2001-06-13	2001-09-08
2002	2002-05-31	2002-09-19
2003	2003-06-22	2003-08-26
2004	2004-06-08	2004-08-27
2005	2005-06-05	2005-09-20
2006	2006-05-28	2006-08-07
2007	2007-05-15	2007-10-08
2008	2008-05-26	2008-09-03
2009	2009-06-20	2009-08-16
2010	2010-05-31	2010-09-24
2011	2011-05-30	2011-09-03
2012	2012-05-03	2012-09-03
2015	2015-06-10	2015-09-08
2016	2016-05-28	2016-09-22
2017	2017-05-17	2017-09-26
2018	2018-05-25	2018-09-21
2019	2019-05-25	2019-10-01
2020	2020-05-25	2020-08-27
2021	2021-05-20	2021-09-17
2022	2022-05-12	2022-09-21
2023	2023-05-29	2023-10-03
2024	2024-05-19	2024-09-21
2025	2025-04-18	2025-10-06
2026	2026-04-14	2026-10-13

Every Fixed Threshold

Fixed thresholds at Detroit City AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	77	58	1998	36
35 C (95 F): Days	52	16	1988	6
90 F (32.2 C): Days	77	38	1988	13
100 F (37.8 C): Days	10	4	1988	2
0 C (32 F): Ice days (max	77	71	1978	34
0 C (32 F): Frost days (min	77	139	2018	73
-10 C (14 F): Days with min	77	53	1963	27
-20 C (-4 F): Days with min	24	4	1979	1
20 C (68 F): Tropical nights (min	77	53	2005	36
25 C (77 F): Days with min	41	7	1968	3
10 mm (0.39 in): Days with 10 mm or more rain	49	36	1957	19
25 mm (0.98 in): Days with 25 mm or more rain	49	10	2021	3
50 mm (1.97 in): Days with 50 mm or more rain	22	3	1959	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	2016	1
10 cm (3.9 in): Days with 10 cm or more snowfall	17	7	1951	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	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 1948.

Download the Data

Data for Detroit City 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 City AP Threshold Days by Year (USW00014822)

Key Facts for Detroit City AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related