Midwest Threshold Days by Year (USC00486195)

19 fixed thresholds counted per year at Midwest (USC00486195): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Midwest Thresholds

Midwest: days with a maximum temperature at or above 30 C (86 F) in 72 years, most in 1988 with 89.
Midwest: days with a maximum temperature at or above 35 C (95 F) in 72 years, most in 1943 with 40.
Midwest: days with a maximum temperature at or above 90 F (32.2 C) in 72 years, most in 1988 with 69.
Midwest: days with a maximum temperature at or below 0 C (32 F) in 72 years, most in 1978 with 60.
19 fixed thresholds have at least one qualifying day at Midwest.

Days at or above 30 C (86 F)

72 years with a qualifying day

Days per year at Midwest with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 89 in 1988.

Days at or above 30 C (86 F) per year at Midwest
Year	Days	Decade average
1939	65	65
1940	77	71.8
1941	49	71.8
1942	71	71.8
1943	82	71.8
1944	72	71.8
1945	58	71.8
1946	79	71.8
1947	73	71.8
1948	83	71.8
1949	74	71.8
1950	58	74.1
1951	52	74.1
1952	80	74.1
1953	85	74.1
1954	75	74.1
1955	79	74.1
1956	84	74.1
1957	70	74.1
1958	71	74.1
1959	87	74.1
1960	76	65.8
1961	78	65.8
1962	58	65.8
1963	82	65.8
1964	46	65.8
1965	34	65.8
1966	79	65.8
1967	63	65.8
1968	60	65.8
1969	82	65.8
1970	64	66.3
1971	77	66.3
1972	46	66.3
1973	54	66.3
1974	70	66.3
1975	67	66.3
1976	80	66.3
1978	67	66.3
1979	72	66.3
1980	84	79.2
1981	77	79.2
1984	80	79.2
1988	89	79.2
1989	66	79.2
1990	74	60.6
1991	60	60.6
1992	42	60.6
1993	25	60.6
1994	87	60.6
1995	58	60.6
1996	78	60.6
2001	70	57.3
2002	60	57.3
2003	59	57.3
2007	63	57.3
2008	47	57.3
2009	45	57.3
2010	46	58.9
2011	69	58.9
2012	87	58.9
2013	76	58.9
2014	51	58.9
2015	54	58.9
2016	59	58.9
2017	62	58.9
2018	52	58.9
2019	33	58.9
2020	74	65.3
2021	77	65.3
2022	60	65.3
2025	50	65.3

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

First to last qualifying date each year at Midwest
Year	First date	Last date
1939	1939-05-29	1939-09-21
1940	1940-05-31	1940-09-12
1941	1941-06-17	1941-09-11
1942	1942-06-18	1942-10-07
1943	1943-05-28	1943-10-05
1944	1944-05-13	1944-09-25
1945	1945-07-02	1945-09-15
1946	1946-04-26	1946-10-02
1947	1947-05-02	1947-10-05
1948	1948-05-17	1948-10-03
1949	1949-05-27	1949-09-29
1950	1950-06-05	1950-10-13
1951	1951-05-27	1951-09-16
1952	1952-04-27	1952-09-28
1953	1953-05-27	1953-10-01
1954	1954-05-19	1954-09-27
1955	1955-05-30	1955-09-16
1956	1956-05-20	1956-10-07
1957	1957-06-03	1957-10-01
1958	1958-05-20	1958-10-14
1959	1959-06-05	1959-09-14
1960	1960-05-12	1960-09-20
1961	1961-05-10	1961-09-07
1962	1962-06-10	1962-09-18
1963	1963-06-13	1963-10-04
1964	1964-05-20	1964-09-17
1965	1965-06-21	1965-08-28
1966	1966-05-05	1966-09-24
1967	1967-05-23	1967-09-30
1968	1968-06-03	1968-09-20
1969	1969-05-24	1969-09-29
1970	1970-06-23	1970-09-09
1971	1971-05-28	1971-09-14
1972	1972-05-17	1972-09-09
1973	1973-06-13	1973-09-07
1974	1974-06-03	1974-09-26
1975	1975-05-16	1975-10-06
1976	1976-05-14	1976-09-18
1978	1978-05-15	1978-09-10
1979	1979-05-24	1979-09-25
1980	1980-05-21	1980-10-04
1981	1981-06-06	1981-09-20
1984	1984-05-14	1984-09-21
1988	1988-05-13	1988-09-09
1989	1989-05-23	1989-10-13
1990	1990-06-04	1990-09-26
1991	1991-05-21	1991-09-07
1992	1992-05-07	1992-10-01
1993	1993-06-27	1993-09-12
1994	1994-06-03	1994-09-29
1995	1995-06-12	1995-09-17
1996	1996-06-05	1996-09-15
2001	2001-05-14	2001-09-29
2002	2002-06-01	2002-09-16
2003	2003-05-27	2003-09-06
2007	2007-05-13	2007-09-23
2008	2008-06-18	2008-09-26
2009	2009-05-19	2009-09-20
2010	2010-05-29	2010-09-29
2011	2011-06-06	2011-10-03
2012	2012-04-24	2012-09-16
2013	2013-05-14	2013-09-09
2014	2014-05-29	2014-09-27
2015	2015-06-02	2015-09-27
2016	2016-06-08	2016-09-21
2017	2017-05-07	2017-09-12
2018	2018-05-27	2018-09-16
2019	2019-06-27	2019-09-11
2020	2020-05-20	2020-09-25
2021	2021-06-04	2021-09-28
2022	2022-06-12	2022-09-14
2025	2025-06-11	2025-09-29

Every Fixed Threshold

Fixed thresholds at Midwest
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	72	89	1988	50
35 C (95 F): Days	72	40	1943	8
40 C (104 F): Days	15	2	1949	1
90 F (32.2 C): Days	72	69	1988	30
100 F (37.8 C): Days	51	10	1954	1
0 C (32 F): Ice days (max	72	60	1978	26
0 C (32 F): Frost days (min	71	213	2019	72
-10 C (14 F): Days with min	71	84	1978	35
-20 C (-4 F): Days with min	71	24	1949	10
-30 C (-22 F): Days with min	37	9	1990	2
-40 C (-40 F): Days with min	2	1	1990	1
20 C (68 F): Tropical nights (min	18	4	1973	1
25 C (77 F): Days with min	1	1	1945	1
10 mm (0.39 in): Days with 10 mm or more rain	69	17	2007	7
25 mm (0.98 in): Days with 25 mm or more rain	47	8	1973	1
50 mm (1.97 in): Days with 50 mm or more rain	9	1	1952	1
10 cm (3.9 in): Days with 10 cm or more snowfall	71	10	1955	2
25 cm (9.8 in): Days with 25 cm or more snowfall	13	3	1953	3
50 cm (19.7 in): Days with 50 cm or more snowfall	2	1	1955	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

Data for Midwest 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).

Midwest Threshold Days by Year (USC00486195)

Key Facts for Midwest Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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