Fond du Lac Wwtp Threshold Days by Year

20 fixed thresholds counted per year at Fond du Lac Wwtp (USC00472839): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Fond du Lac Wwtp Thresholds

Fond du Lac Wwtp: days with a maximum temperature at or above 30 C (86 F) in 126 years, most in 1930 with 70.
Fond du Lac Wwtp: days with a maximum temperature at or below 0 C (32 F) in 126 years, most in 2013 with 103.
Fond du Lac Wwtp: nights with a minimum temperature at or below 0 C (32 F) in 126 years, most in 2018 with 177.
Fond du Lac Wwtp: nights with a minimum temperature at or below -10 C (14 F) in 126 years, most in 2014 with 94.
20 fixed thresholds have at least one qualifying day at Fond du Lac Wwtp.

Days at or above 30 C (86 F)

126 years with a qualifying day

Days per year at Fond du Lac Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 70 in 1930.

Days at or above 30 C (86 F) per year at Fond du Lac Wwtp
Year	Days	Decade average
1893	29	30
1894	48	30
1897	16	30
1898	27	30
1900	32	18.5
1902	11	18.5
1903	7	18.5
1904	12	18.5
1905	16	18.5
1907	6	18.5
1908	30	18.5
1909	34	18.5
1910	46	36.3
1911	38	36.3
1912	27	36.3
1913	36	36.3
1914	48	36.3
1915	20	36.3
1916	43	36.3
1917	23	36.3
1918	33	36.3
1919	49	36.3
1920	24	35.1
1921	58	35.1
1922	25	35.1
1923	39	35.1
1924	8	35.1
1925	39	35.1
1926	39	35.1
1927	42	35.1
1928	36	35.1
1929	41	35.1
1930	70	61.5
1931	68	61.5
1932	64	61.5
1933	68	61.5
1934	69	61.5
1935	48	61.5
1936	63	61.5
1937	58	61.5
1938	44	61.5
1939	63	61.5
1940	41	37.2
1941	45	37.2
1943	36	37.2
1944	32	37.2
1945	14	37.2
1946	19	37.2
1947	44	37.2
1948	53	37.2
1949	51	37.2
1950	17	26.6
1951	14	26.6
1952	44	26.6
1953	36	26.6
1954	25	26.6
1955	45	26.6
1956	11	26.6
1957	23	26.6
1958	18	26.6
1959	33	26.6
1960	18	21.8
1961	23	21.8
1962	17	21.8
1963	29	21.8
1964	28	21.8
1965	15	21.8
1966	26	21.8
1967	13	21.8
1968	27	21.8
1969	22	21.8
1970	41	26
1971	30	26
1972	21	26
1973	28	26
1974	14	26
1975	29	26
1976	38	26
1977	27	26
1978	22	26
1979	10	26
1980	21	24.5
1981	13	24.5
1982	10	24.5
1983	41	24.5
1984	21	24.5
1985	21	24.5
1986	18	24.5
1987	37	24.5
1988	48	24.5
1989	15	24.5
1990	11	15.7
1991	27	15.7
1992	7	15.7
1993	7	15.7
1994	15	15.7
1995	28	15.7
1996	9	15.7
1997	9	15.7
1998	17	15.7
1999	27	15.7
2001	28	15.9
2002	32	15.9
2003	12	15.9
2004	2	15.9
2005	27	15.9
2006	20	15.9
2007	14	15.9
2008	6	15.9
2009	2	15.9
2010	10	13.1
2011	16	13.1
2012	39	13.1
2013	11	13.1
2014	1	13.1
2015	7	13.1
2016	14	13.1
2017	8	13.1
2018	18	13.1
2019	7	13.1
2020	28	19.8
2021	26	19.8
2023	17	19.8
2024	13	19.8
2025	18	19.8
2026	17	19.8

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

First to last qualifying date each year at Fond du Lac Wwtp
Year	First date	Last date
1893	1893-06-12	1893-09-14
1894	1894-05-16	1894-09-08
1897	1897-06-13	1897-09-30
1898	1898-06-03	1898-09-29
1900	1900-05-12	1900-09-10
1902	1902-05-19	1902-07-30
1903	1903-07-03	1903-07-28
1904	1904-05-21	1904-09-10
1905	1905-06-14	1905-09-28
1907	1907-06-16	1907-09-01
1908	1908-06-22	1908-09-26
1909	1909-06-04	1909-09-20
1910	1910-06-16	1910-08-24
1911	1911-05-18	1911-09-01
1912	1912-06-23	1912-09-14
1913	1913-05-01	1913-09-07
1914	1914-05-25	1914-09-20
1915	1915-04-23	1915-09-14
1916	1916-05-26	1916-09-06
1917	1917-05-17	1917-08-26
1918	1918-05-03	1918-09-01
1919	1919-05-29	1919-09-09
1920	1920-05-31	1920-09-25
1921	1921-05-20	1921-09-02
1922	1922-05-10	1922-09-07
1923	1923-06-01	1923-09-26
1924	1924-06-19	1924-08-30
1925	1925-05-22	1925-09-19
1926	1926-05-01	1926-09-18
1927	1927-05-09	1927-09-17
1928	1928-05-03	1928-10-11
1929	1929-05-28	1929-09-04
1930	1930-04-10	1930-10-12
1931	1931-05-27	1931-09-20
1932	1932-05-14	1932-09-19
1933	1933-05-23	1933-09-25
1934	1934-05-03	1934-09-25
1935	1935-06-14	1935-09-24
1936	1936-05-07	1936-09-22
1937	1937-05-30	1937-09-23
1938	1938-05-02	1938-10-10
1939	1939-05-05	1939-09-28
1940	1940-06-01	1940-09-07
1941	1941-05-05	1941-09-21
1943	1943-06-03	1943-08-31
1944	1944-05-30	1944-09-03
1945	1945-06-23	1945-09-07
1946	1946-06-16	1946-08-17
1947	1947-06-28	1947-10-15
1948	1948-05-20	1948-09-19
1949	1949-05-03	1949-10-08
1950	1950-05-24	1950-08-16
1951	1951-06-18	1951-09-12
1952	1952-04-27	1952-09-28
1953	1953-05-29	1953-09-29
1954	1954-06-09	1954-09-06
1955	1955-05-21	1955-09-18
1956	1956-05-22	1956-08-15
1957	1957-06-16	1957-09-01
1958	1958-05-14	1958-09-03
1959	1959-05-02	1959-09-09
1960	1960-06-27	1960-09-08
1961	1961-06-05	1961-09-10
1962	1962-05-16	1962-09-12
1963	1963-05-08	1963-10-06
1964	1964-05-22	1964-09-07
1965	1965-05-07	1965-08-17
1966	1966-06-21	1966-09-01
1967	1967-05-26	1967-10-04
1968	1968-06-05	1968-09-03
1969	1969-05-28	1969-09-06
1970	1970-04-29	1970-09-07
1971	1971-06-04	1971-10-02
1972	1972-05-19	1972-08-30
1973	1973-06-08	1973-09-03
1974	1974-05-21	1974-08-26
1975	1975-05-18	1975-10-13
1976	1976-06-07	1976-10-01
1977	1977-05-13	1977-08-27
1978	1978-05-26	1978-09-19
1979	1979-06-15	1979-08-07
1980	1980-04-22	1980-08-06
1981	1981-06-05	1981-09-11
1982	1982-05-14	1982-08-16
1983	1983-06-11	1983-09-10
1984	1984-06-05	1984-09-07
1985	1985-05-25	1985-09-19
1986	1986-05-30	1986-08-16
1987	1987-04-20	1987-09-05
1988	1988-05-28	1988-09-17
1989	1989-05-24	1989-08-04
1990	1990-04-25	1990-09-06
1991	1991-05-12	1991-09-09
1992	1992-06-12	1992-08-25
1993	1993-06-24	1993-08-26
1994	1994-05-21	1994-09-15
1995	1995-06-06	1995-09-05
1996	1996-05-18	1996-08-21
1997	1997-06-22	1997-08-02
1998	1998-05-17	1998-09-13
1999	1999-06-05	1999-09-05
2001	2001-05-15	2001-08-09
2002	2002-04-15	2002-09-09
2003	2003-06-24	2003-08-28
2004	2004-06-07	2004-06-08
2005	2005-06-07	2005-09-21
2006	2006-05-28	2006-08-02
2007	2007-05-29	2007-09-06
2008	2008-07-15	2008-09-02
2009	2009-06-24	2009-06-25
2010	2010-05-24	2010-08-31
2011	2011-05-31	2011-09-02
2012	2012-05-20	2012-09-05
2013	2013-07-17	2013-09-11
2014	2014-07-23	2014-07-23
2015	2015-07-18	2015-09-07
2016	2016-06-11	2016-09-07
2017	2017-06-11	2017-09-25
2018	2018-05-26	2018-09-18
2019	2019-07-05	2019-08-20
2020	2020-05-26	2020-08-27
2021	2021-05-02	2021-09-20
2023	2023-05-31	2023-09-05
2024	2024-06-17	2024-09-20
2025	2025-06-22	2025-10-05
2026	2026-05-27	2026-09-02

Every Fixed Threshold

Fixed thresholds at Fond du Lac Wwtp
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	126	70	1930	17
35 C (95 F): Days	70	28	1931	1
40 C (104 F): Days	4	6	1936	6
90 F (32.2 C): Days	119	51	1934	8
100 F (37.8 C): Days	18	11	1931	2
110 F (43.3 C): Days	1	2	1936	2
0 C (32 F): Ice days (max	126	103	2013	39
0 C (32 F): Frost days (min	126	177	2018	90
-10 C (14 F): Days with min	126	94	2014	33
-20 C (-4 F): Days with min	125	37	1893	11
-30 C (-22 F): Days with min	33	8	1951	3
-40 C (-40 F): Days with min	1	1	1951	1
20 C (68 F): Tropical nights (min	126	32	1988	16
25 C (77 F): Days with min	22	2	1988	1
10 mm (0.39 in): Days with 10 mm or more rain	126	37	2019	23
25 mm (0.98 in): Days with 25 mm or more rain	125	14	2020	8
50 mm (1.97 in): Days with 50 mm or more rain	69	4	2018	2
100 mm (3.94 in): Days with 100 mm or more rain	6	1	1924	1
10 cm (3.9 in): Days with 10 cm or more snowfall	77	9	1926	1
25 cm (9.8 in): Days with 25 cm or more snowfall	14	2	1923	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.

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Data for Fond du Lac Wwtp 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Fond du Lac Wwtp Threshold Days by Year

Key Facts for Fond du Lac Wwtp Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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