Marengo Threshold Days by Year (USC00115326)

19 fixed thresholds counted per year at Marengo (USC00115326): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Marengo Thresholds

Marengo: days with a maximum temperature at or above 30 C (86 F) in 111 years, most in 1991 with 72.
Marengo: days with a maximum temperature at or below 0 C (32 F) in 111 years, most in 1904 with 78.
Marengo: days with a maximum temperature at or above 90 F (32.2 C) in 109 years, most in 1988 with 52.
Marengo: nights with a minimum temperature at or below 0 C (32 F) in 109 years, most in 1926 with 171.
19 fixed thresholds have at least one qualifying day at Marengo.

Days at or above 30 C (86 F)

111 years with a qualifying day

Days per year at Marengo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 72 in 1991.

Days at or above 30 C (86 F) per year at Marengo
Year	Days	Decade average
1893	27	39.1
1894	47	39.1
1895	46	39.1
1896	31	39.1
1897	40	39.1
1898	31	39.1
1899	52	39.1
1900	42	29.3
1901	59	29.3
1902	13	29.3
1903	14	29.3
1904	20	29.3
1905	28	29.3
1906	43	29.3
1907	14	29.3
1908	34	29.3
1909	26	29.3
1910	43	35.4
1911	46	35.4
1912	25	35.4
1913	37	35.4
1914	35	35.4
1915	9	35.4
1916	42	35.4
1919	46	35.4
1920	34	38.7
1921	68	38.7
1922	58	38.7
1923	40	38.7
1924	16	38.7
1925	48	38.7
1926	31	38.7
1927	40	38.7
1928	23	38.7
1929	29	38.7
1930	43	50.9
1931	52	50.9
1932	45	50.9
1933	52	50.9
1934	64	50.9
1935	38	50.9
1936	55	50.9
1937	59	50.9
1938	39	50.9
1939	62	50.9
1940	44	52.5
1941	58	52.5
1942	39	52.5
1943	52	52.5
1944	60	52.5
1945	29	52.5
1946	59	52.5
1947	63	52.5
1948	57	52.5
1949	64	52.5
1950	23	35.8
1951	14	35.8
1952	46	35.8
1953	50	35.8
1954	38	35.8
1957	42	35.8
1958	26	35.8
1959	47	35.8
1960	26	40.9
1961	39	40.9
1962	39	40.9
1963	51	40.9
1964	56	40.9
1965	42	40.9
1966	54	40.9
1967	25	40.9
1968	39	40.9
1969	38	40.9
1970	54	42.4
1971	59	42.4
1972	40	42.4
1973	39	42.4
1974	32	42.4
1975	40	42.4
1976	42	42.4
1977	38	42.4
1978	44	42.4
1979	36	42.4
1980	35	40.1
1981	19	40.1
1982	20	40.1
1983	61	40.1
1984	40	40.1
1985	40	40.1
1986	32	40.1
1987	52	40.1
1988	70	40.1
1989	32	40.1
1990	29	40.1
1991	72	40.1
1992	18	40.1
1993	32	40.1
1994	45	40.1
1995	58	40.1
1996	28	40.1
1997	39	40.1
2003	33	28.5
2004	11	28.5
2005	58	28.5
2009	12	28.5
2010	45	39.5
2011	42	39.5
2012	61	39.5
2013	31	39.5
2015	23	39.5
2016	35	39.5

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

First to last qualifying date each year at Marengo
Year	First date	Last date
1893	1893-06-18	1893-09-21
1894	1894-05-16	1894-09-02
1895	1895-05-09	1895-09-22
1896	1896-05-07	1896-09-09
1897	1897-06-13	1897-10-15
1898	1898-06-03	1898-09-29
1899	1899-04-26	1899-10-15
1900	1900-05-12	1900-09-25
1901	1901-05-01	1901-10-01
1902	1902-04-21	1902-07-30
1903	1903-06-29	1903-08-24
1904	1904-06-03	1904-09-10
1905	1905-06-04	1905-09-29
1906	1906-05-16	1906-09-18
1907	1907-06-17	1907-09-15
1908	1908-06-18	1908-09-26
1909	1909-06-22	1909-08-26
1910	1910-06-15	1910-08-24
1911	1911-05-10	1911-09-02
1912	1912-05-23	1912-09-10
1913	1913-06-15	1913-09-07
1914	1914-05-26	1914-08-23
1915	1915-04-23	1915-09-12
1916	1916-05-25	1916-08-30
1919	1919-05-30	1919-09-20
1920	1920-06-08	1920-09-26
1921	1921-05-19	1921-09-04
1922	1922-05-10	1922-10-05
1923	1923-06-01	1923-08-18
1924	1924-06-19	1924-09-21
1925	1925-04-23	1925-09-19
1926	1926-04-30	1926-09-18
1927	1927-05-21	1927-09-17
1928	1928-05-03	1928-09-10
1929	1929-05-28	1929-09-04
1930	1930-04-10	1930-09-23
1931	1931-05-28	1931-09-21
1932	1932-05-14	1932-09-19
1933	1933-06-04	1933-09-25
1934	1934-05-03	1934-08-23
1935	1935-06-13	1935-09-24
1936	1936-05-06	1936-09-15
1937	1937-05-29	1937-09-23
1938	1938-05-03	1938-10-10
1939	1939-05-25	1939-10-07
1940	1940-05-13	1940-09-21
1941	1941-05-15	1941-09-24
1942	1942-04-29	1942-09-18
1943	1943-05-05	1943-09-03
1944	1944-05-15	1944-09-18
1945	1945-06-23	1945-09-07
1946	1946-06-06	1946-10-06
1947	1947-06-09	1947-10-17
1948	1948-04-25	1948-09-19
1949	1949-05-03	1949-10-08
1950	1950-05-24	1950-10-17
1951	1951-05-16	1951-09-12
1952	1952-04-28	1952-09-28
1953	1953-05-09	1953-10-02
1954	1954-06-09	1954-10-03
1957	1957-06-10	1957-09-19
1958	1958-05-14	1958-09-24
1959	1959-05-02	1959-09-22
1960	1960-07-19	1960-09-08
1961	1961-05-13	1961-09-11
1962	1962-04-26	1962-10-15
1963	1963-05-08	1963-10-06
1964	1964-05-07	1964-09-10
1965	1965-05-02	1965-09-19
1966	1966-05-23	1966-09-13
1967	1967-05-18	1967-10-04
1968	1968-05-02	1968-09-03
1969	1969-05-16	1969-09-03
1970	1970-04-29	1970-09-21
1971	1971-05-17	1971-10-02
1972	1972-05-18	1972-09-17
1973	1973-06-08	1973-09-03
1974	1974-05-21	1974-09-11
1975	1975-05-18	1975-10-13
1976	1976-06-07	1976-09-13
1977	1977-04-17	1977-08-31
1978	1978-05-25	1978-09-19
1979	1979-05-08	1979-09-29
1980	1980-04-23	1980-09-09
1981	1981-06-06	1981-09-01
1982	1982-05-12	1982-10-07
1983	1983-06-11	1983-09-11
1984	1984-06-05	1984-09-25
1985	1985-04-19	1985-09-20
1986	1986-04-26	1986-09-28
1987	1987-04-21	1987-08-18
1988	1988-05-22	1988-09-19
1989	1989-05-25	1989-08-23
1990	1990-04-25	1990-10-06
1991	1991-05-12	1991-09-16
1992	1992-05-02	1992-08-26
1993	1993-05-09	1993-08-31
1994	1994-04-26	1994-09-21
1995	1995-06-07	1995-09-06
1996	1996-05-18	1996-09-08
1997	1997-06-14	1997-10-08
2003	2003-06-16	2003-09-12
2004	2004-05-10	2004-08-04
2005	2005-06-05	2005-10-05
2009	2009-06-20	2009-08-16
2010	2010-05-24	2010-10-10
2011	2011-05-11	2011-09-03
2012	2012-05-20	2012-09-13
2013	2013-05-15	2013-09-20
2015	2015-06-10	2015-09-08
2016	2016-05-27	2016-09-25

Every Fixed Threshold

Fixed thresholds at Marengo
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	111	72	1991	35
35 C (95 F): Days	85	34	1988	3
40 C (104 F): Days	7	8	1936	1
90 F (32.2 C): Days	109	52	1988	7
100 F (37.8 C): Days	27	11	1936	4
0 C (32 F): Ice days (max	111	78	1904	45
0 C (32 F): Frost days (min	109	171	1926	127
-10 C (14 F): Days with min	109	74	1978	32
-20 C (-4 F): Days with min	104	37	1963	9
-30 C (-22 F): Days with min	23	3	1936	2
20 C (68 F): Tropical nights (min	109	28	1995	17
25 C (77 F): Days with min	14	2	1916	2
10 mm (0.39 in): Days with 10 mm or more rain	109	42	1972	31
25 mm (0.98 in): Days with 25 mm or more rain	109	19	1972	10
50 mm (1.97 in): Days with 50 mm or more rain	80	5	1996	1
100 mm (3.94 in): Days with 100 mm or more rain	5	1	1894	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1894	1
10 cm (3.9 in): Days with 10 cm or more snowfall	80	7	1994	1
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1897	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Marengo 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).

Marengo Threshold Days by Year (USC00115326)

Key Facts for Marengo Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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