Manitowoc Threshold Days by Year

18 fixed thresholds counted per year at Manitowoc (USC00475017): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Manitowoc Thresholds

Manitowoc: days with a maximum temperature at or above 30 C (86 F) in 127 years, most in 1936 with 28.
Manitowoc: days with a maximum temperature at or below 0 C (32 F) in 127 years, most in 2014 with 86.
Manitowoc: nights with a minimum temperature at or below 0 C (32 F) in 127 years, most in 1976 with 168.
Manitowoc: nights with a minimum temperature at or below -10 C (14 F) in 127 years, most in 1978 with 76.
18 fixed thresholds have at least one qualifying day at Manitowoc.

Days at or above 30 C (86 F)

127 years with a qualifying day

Days per year at Manitowoc with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 28 in 1936.

Days at or above 30 C (86 F) per year at Manitowoc
Year	Days	Decade average
1894	19	11.2
1895	8	11.2
1896	18	11.2
1897	6	11.2
1898	9	11.2
1899	7	11.2
1900	13	9.6
1901	8	9.6
1902	9	9.6
1903	7	9.6
1904	4	9.6
1905	7	9.6
1907	6	9.6
1908	24	9.6
1909	8	9.6
1910	16	9.5
1911	13	9.5
1912	5	9.5
1913	10	9.5
1914	8	9.5
1915	3	9.5
1916	12	9.5
1917	6	9.5
1918	9	9.5
1919	13	9.5
1920	7	8.7
1921	20	8.7
1922	11	8.7
1923	10	8.7
1924	4	8.7
1925	9	8.7
1926	7	8.7
1927	7	8.7
1928	4	8.7
1929	8	8.7
1930	20	18.9
1931	24	18.9
1932	12	18.9
1933	21	18.9
1934	18	18.9
1935	19	18.9
1936	28	18.9
1937	22	18.9
1938	11	18.9
1939	14	18.9
1940	13	14.1
1941	25	14.1
1942	8	14.1
1943	22	14.1
1944	22	14.1
1945	7	14.1
1946	6	14.1
1947	10	14.1
1948	15	14.1
1949	13	14.1
1950	5	11.4
1951	7	11.4
1952	10	11.4
1953	14	11.4
1954	10	11.4
1955	24	11.4
1956	8	11.4
1957	12	11.4
1958	12	11.4
1959	12	11.4
1960	11	12.7
1961	13	12.7
1962	4	12.7
1963	7	12.7
1964	21	12.7
1965	10	12.7
1966	20	12.7
1967	8	12.7
1968	14	12.7
1969	19	12.7
1970	25	15.9
1971	17	15.9
1972	11	15.9
1973	16	15.9
1975	18	15.9
1976	24	15.9
1977	13	15.9
1978	12	15.9
1979	7	15.9
1980	11	9.8
1981	9	9.8
1982	7	9.8
1984	19	9.8
1985	9	9.8
1989	4	9.8
1990	12	10.4
1991	17	10.4
1992	4	10.4
1993	4	10.4
1994	5	10.4
1995	14	10.4
1996	7	10.4
1997	7	10.4
1998	16	10.4
1999	18	10.4
2000	4	12.2
2001	15	12.2
2002	19	12.2
2003	7	12.2
2004	2	12.2
2005	18	12.2
2006	16	12.2
2007	27	12.2
2008	9	12.2
2009	5	12.2
2010	5	6.4
2011	11	6.4
2012	11	6.4
2013	9	6.4
2014	2	6.4
2015	7	6.4
2016	6	6.4
2017	1	6.4
2018	5	6.4
2019	7	6.4
2020	4	6.6
2021	12	6.6
2022	7	6.6
2023	9	6.6
2024	1	6.6
2025	4	6.6
2026	9	6.6

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

First to last qualifying date each year at Manitowoc
Year	First date	Last date
1894	1894-06-12	1894-09-02
1895	1895-06-02	1895-09-19
1896	1896-05-09	1896-08-29
1897	1897-07-02	1897-09-30
1898	1898-06-24	1898-09-03
1899	1899-07-20	1899-09-05
1900	1900-06-24	1900-09-05
1901	1901-07-01	1901-08-19
1902	1902-05-03	1902-07-17
1903	1903-05-19	1903-07-28
1904	1904-06-24	1904-07-18
1905	1905-06-25	1905-08-29
1907	1907-06-17	1907-09-01
1908	1908-04-22	1908-09-18
1909	1909-06-30	1909-08-25
1910	1910-06-15	1910-08-03
1911	1911-05-17	1911-08-09
1912	1912-06-25	1912-09-09
1913	1913-06-15	1913-09-07
1914	1914-05-25	1914-08-06
1915	1915-07-16	1915-08-15
1916	1916-07-07	1916-08-20
1917	1917-07-08	1917-07-31
1918	1918-06-11	1918-08-25
1919	1919-06-14	1919-09-08
1920	1920-06-12	1920-07-30
1921	1921-05-22	1921-09-02
1922	1922-06-07	1922-09-02
1923	1923-06-23	1923-08-14
1924	1924-07-22	1924-08-26
1925	1925-05-22	1925-08-30
1926	1926-06-29	1926-08-28
1927	1927-06-29	1927-09-15
1928	1928-07-16	1928-08-08
1929	1929-07-17	1929-09-03
1930	1930-06-19	1930-09-19
1931	1931-06-19	1931-09-11
1932	1932-05-15	1932-09-19
1933	1933-06-15	1933-09-09
1934	1934-05-06	1934-08-18
1935	1935-06-14	1935-09-24
1936	1936-05-23	1936-09-23
1937	1937-05-31	1937-09-09
1938	1938-07-08	1938-08-18
1939	1939-05-30	1939-09-15
1940	1940-06-03	1940-09-20
1941	1941-05-26	1941-08-31
1942	1942-06-29	1942-07-26
1943	1943-06-12	1943-08-14
1944	1944-05-14	1944-08-13
1945	1945-06-23	1945-08-28
1946	1946-06-23	1946-07-19
1947	1947-07-26	1947-08-24
1948	1948-05-20	1948-09-17
1949	1949-06-23	1949-08-26
1950	1950-06-06	1950-07-30
1951	1951-07-15	1951-08-02
1952	1952-05-01	1952-08-28
1953	1953-06-19	1953-09-02
1954	1954-06-12	1954-09-02
1955	1955-06-20	1955-09-04
1956	1956-05-22	1956-08-07
1957	1957-06-20	1957-08-26
1958	1958-06-27	1958-08-31
1959	1959-06-09	1959-09-07
1960	1960-07-08	1960-09-08
1961	1961-06-05	1961-09-10
1962	1962-04-26	1962-08-19
1963	1963-06-26	1963-10-06
1964	1964-05-22	1964-09-03
1965	1965-06-20	1965-08-15
1966	1966-06-20	1966-09-01
1967	1967-06-15	1967-09-08
1968	1968-06-07	1968-08-24
1969	1969-05-28	1969-08-31
1970	1970-05-21	1970-08-28
1971	1971-06-06	1971-10-01
1972	1972-05-20	1972-08-28
1973	1973-06-08	1973-08-29
1975	1975-06-23	1975-08-17
1976	1976-06-07	1976-09-08
1977	1977-05-13	1977-08-08
1978	1978-05-19	1978-09-12
1979	1979-06-15	1979-08-07
1980	1980-04-22	1980-08-02
1981	1981-06-05	1981-09-11
1982	1982-07-07	1982-08-19
1984	1984-06-02	1984-08-29
1985	1985-06-24	1985-09-03
1989	1989-07-09	1989-08-04
1990	1990-06-30	1990-09-04
1991	1991-05-14	1991-09-10
1992	1992-06-12	1992-08-10
1993	1993-07-27	1993-08-27
1994	1994-06-18	1994-09-15
1995	1995-06-18	1995-08-30
1996	1996-05-18	1996-09-05
1997	1997-07-14	1997-08-02
1998	1998-05-19	1998-09-11
1999	1999-06-24	1999-08-27
2000	2000-06-10	2000-08-28
2001	2001-06-27	2001-08-09
2002	2002-06-01	2002-09-09
2003	2003-07-04	2003-09-06
2004	2004-06-08	2004-07-21
2005	2005-06-24	2005-09-21
2006	2006-05-29	2006-08-02
2007	2007-05-14	2007-10-07
2008	2008-06-26	2008-08-18
2009	2009-06-20	2009-08-09
2010	2010-07-04	2010-08-08
2011	2011-06-04	2011-09-12
2012	2012-06-09	2012-07-24
2013	2013-07-17	2013-09-11
2014	2014-07-22	2014-07-23
2015	2015-07-17	2015-08-16
2016	2016-06-11	2016-07-25
2017	2017-06-12	2017-06-12
2018	2018-07-05	2018-08-14
2019	2019-05-31	2019-07-28
2020	2020-07-03	2020-08-27
2021	2021-06-04	2021-08-11
2022	2022-06-21	2022-07-23
2023	2023-06-30	2023-09-04
2024	2024-07-14	2024-07-14
2025	2025-06-22	2025-09-27
2026	2026-06-30	2026-09-01

Every Fixed Threshold

Fixed thresholds at Manitowoc
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	127	28	1936	9
35 C (95 F): Days	54	10	1931	1
40 C (104 F): Days	1	2	1936	2
90 F (32.2 C): Days	110	17	1931	2
100 F (37.8 C): Days	7	6	1936	1
0 C (32 F): Ice days (max	127	86	2014	36
0 C (32 F): Frost days (min	127	168	1976	83
-10 C (14 F): Days with min	127	76	1978	27
-20 C (-4 F): Days with min	124	27	1912	4
-30 C (-22 F): Days with min	15	5	1899	2
20 C (68 F): Tropical nights (min	114	30	1955	7
25 C (77 F): Days with min	14	2	1917	1
10 mm (0.39 in): Days with 10 mm or more rain	124	37	2019	17
25 mm (0.98 in): Days with 25 mm or more rain	123	12	1934	7
50 mm (1.97 in): Days with 50 mm or more rain	62	4	1902	1
100 mm (3.94 in): Days with 100 mm or more rain	6	1	1912	1
10 cm (3.9 in): Days with 10 cm or more snowfall	62	7	2008	2
25 cm (9.8 in): Days with 25 cm or more snowfall	7	2	1959	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

Data for Manitowoc 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Manitowoc Threshold Days by Year

Key Facts for Manitowoc Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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