Waukesha Wwtp Threshold Days by Year (USC00478937)

19 fixed thresholds counted per year at Waukesha Wwtp (USC00478937): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Waukesha Wwtp Thresholds

Waukesha Wwtp: days with 10 mm (0.39 in) or more of precipitation in 123 years, most in 2019 with 49.
Waukesha Wwtp: days with 25 mm (0.98 in) or more of precipitation in 122 years, most in 2013 with 16.
Waukesha Wwtp: days with a maximum temperature at or above 30 C (86 F) in 109 years, most in 1995 with 62.
Waukesha Wwtp: days with a maximum temperature at or below 0 C (32 F) in 109 years, most in 1904 with 87.
19 fixed thresholds have at least one qualifying day at Waukesha Wwtp.

Days at or above 30 C (86 F)

109 years with a qualifying day

Days per year at Waukesha Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 62 in 1995.

Days at or above 30 C (86 F) per year at Waukesha Wwtp
Year	Days	Decade average
1895	30	25.6
1896	28	25.6
1897	23	25.6
1898	24	25.6
1899	23	25.6
1900	26	17
1901	39	17
1902	8	17
1903	7	17
1904	5	17
1911	49	29.1
1912	25	29.1
1913	33	29.1
1914	34	29.1
1915	4	29.1
1917	16	29.1
1918	31	29.1
1919	41	29.1
1920	29	27.2
1921	58	27.2
1922	29	27.2
1923	33	27.2
1924	16	27.2
1925	32	27.2
1926	14	27.2
1927	19	27.2
1928	17	27.2
1929	25	27.2
1930	36	40
1931	49	40
1932	28	40
1933	41	40
1934	50	40
1935	29	40
1936	47	40
1937	50	40
1938	30	40
1940	25	34.3
1941	44	34.3
1942	24	34.3
1943	36	34.3
1944	42	34.3
1945	22	34.3
1946	32	34.3
1947	38	34.3
1948	41	34.3
1949	39	34.3
1950	12	29.8
1951	11	29.8
1952	40	29.8
1953	45	29.8
1954	30	29.8
1955	53	29.8
1956	21	29.8
1957	27	29.8
1958	19	29.8
1959	40	29.8
1960	17	25
1961	31	25
1962	27	25
1963	32	25
1964	34	25
1965	17	25
1966	31	25
1967	10	25
1968	27	25
1969	24	25
1970	34	28
1971	34	28
1972	21	28
1973	28	28
1974	15	28
1975	29	28
1976	35	28
1977	34	28
1978	28	28
1979	22	28
1980	31	26.7
1981	17	26.7
1982	13	26.7
1983	53	26.7
1984	28	26.7
1985	24	26.7
1986	21	26.7
1992	12	34.5
1993	27	34.5
1994	51	34.5
1995	62	34.5
1996	29	34.5
1997	22	34.5
1998	36	34.5
1999	37	34.5
2000	10	18.7
2001	28	18.7
2002	37	18.7
2003	18	18.7
2004	6	18.7
2005	35	18.7
2006	19	18.7
2007	23	18.7
2008	7	18.7
2009	4	18.7
2010	26	29.3
2011	30	29.3
2012	48	29.3
2013	13	29.3
2024	12	16
2025	14	16
2026	22	16

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

First to last qualifying date each year at Waukesha Wwtp
Year	First date	Last date
1895	1895-05-09	1895-09-22
1896	1896-05-07	1896-08-11
1897	1897-06-13	1897-10-04
1898	1898-06-04	1898-09-03
1899	1899-04-29	1899-09-16
1900	1900-05-12	1900-09-10
1901	1901-06-11	1901-09-06
1902	1902-07-04	1902-07-30
1903	1903-07-03	1903-07-28
1904	1904-06-23	1904-07-18
1911	1911-05-17	1911-09-02
1912	1912-05-23	1912-09-10
1913	1913-06-15	1913-09-08
1914	1914-05-26	1914-09-20
1915	1915-07-11	1915-08-01
1917	1917-05-17	1917-08-26
1918	1918-05-31	1918-08-26
1919	1919-05-30	1919-09-09
1920	1920-06-09	1920-09-26
1921	1921-05-21	1921-09-04
1922	1922-05-10	1922-09-08
1923	1923-06-01	1923-09-05
1924	1924-06-19	1924-08-30
1925	1925-05-22	1925-09-19
1926	1926-07-05	1926-09-18
1927	1927-06-28	1927-09-17
1928	1928-05-03	1928-08-27
1929	1929-05-28	1929-09-03
1930	1930-04-10	1930-09-23
1931	1931-06-18	1931-09-20
1932	1932-05-15	1932-09-19
1933	1933-06-06	1933-09-25
1934	1934-05-06	1934-08-19
1935	1935-07-03	1935-09-24
1936	1936-05-07	1936-09-22
1937	1937-05-30	1937-09-23
1938	1938-05-03	1938-10-10
1940	1940-06-02	1940-09-20
1941	1941-05-20	1941-09-22
1942	1942-04-30	1942-09-01
1943	1943-06-12	1943-08-31
1944	1944-05-30	1944-09-03
1945	1945-06-23	1945-09-07
1946	1946-06-16	1946-10-05
1947	1947-06-09	1947-09-20
1948	1948-06-02	1948-09-19
1949	1949-05-03	1949-08-27
1950	1950-05-24	1950-08-16
1951	1951-05-16	1951-09-12
1952	1952-05-01	1952-09-30
1953	1953-05-29	1953-10-20
1954	1954-06-11	1954-09-27
1955	1955-05-03	1955-09-18
1956	1956-05-22	1956-09-03
1957	1957-06-16	1957-09-01
1958	1958-05-17	1958-09-03
1959	1959-05-04	1959-09-22
1960	1960-06-27	1960-09-08
1961	1961-06-05	1961-09-10
1962	1962-05-15	1962-09-12
1963	1963-06-02	1963-10-06
1964	1964-05-18	1964-09-09
1965	1965-05-07	1965-09-09
1966	1966-06-04	1966-09-01
1967	1967-05-26	1967-07-24
1968	1968-06-05	1968-09-03
1969	1969-05-16	1969-08-31
1970	1970-05-21	1970-09-07
1971	1971-06-04	1971-10-02
1972	1972-05-20	1972-08-30
1973	1973-06-08	1973-09-03
1974	1974-07-01	1974-08-26
1975	1975-05-18	1975-10-13
1976	1976-06-07	1976-09-08
1977	1977-05-13	1977-08-27
1978	1978-05-26	1978-09-19
1979	1979-05-08	1979-08-31
1980	1980-04-22	1980-08-28
1981	1981-06-05	1981-09-11
1982	1982-05-14	1982-09-30
1983	1983-06-11	1983-09-10
1984	1984-06-05	1984-09-24
1985	1985-04-18	1985-09-19
1986	1986-04-27	1986-08-17
1992	1992-05-01	1992-08-25
1993	1993-05-10	1993-08-31
1994	1994-04-19	1994-09-21
1995	1995-05-31	1995-09-06
1996	1996-05-18	1996-09-11
1997	1997-06-21	1997-10-08
1998	1998-05-16	1998-09-27
1999	1999-05-29	1999-09-06
2000	2000-06-09	2000-09-03
2001	2001-05-16	2001-09-04
2002	2002-04-16	2002-09-10
2003	2003-06-24	2003-09-09
2004	2004-06-08	2004-09-13
2005	2005-06-08	2005-09-22
2006	2006-05-29	2006-08-05
2007	2007-05-15	2007-10-07
2008	2008-06-13	2008-09-03
2009	2009-06-24	2009-08-09
2010	2010-05-24	2010-09-01
2011	2011-05-23	2011-09-04
2012	2012-05-20	2012-09-05
2013	2013-07-15	2013-09-11
2024	2024-06-17	2024-09-22
2025	2025-06-18	2025-08-16
2026	2026-06-05	2026-10-13

Every Fixed Threshold

Fixed thresholds at Waukesha Wwtp
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	109	62	1995	22
35 C (95 F): Days	70	17	1931	2
40 C (104 F): Days	3	4	1936	2
90 F (32.2 C): Days	105	39	1931	9
100 F (37.8 C): Days	21	9	1934	3
0 C (32 F): Ice days (max	109	87	1904	34
0 C (32 F): Frost days (min	107	172	1926	94
-10 C (14 F): Days with min	107	74	1950	36
-20 C (-4 F): Days with min	103	29	1912	10
-30 C (-22 F): Days with min	21	3	1899	3
20 C (68 F): Tropical nights (min	105	55	1995	20
25 C (77 F): Days with min	11	5	1995	2
10 mm (0.39 in): Days with 10 mm or more rain	123	49	2019	25
25 mm (0.98 in): Days with 25 mm or more rain	122	16	2013	8
50 mm (1.97 in): Days with 50 mm or more rain	85	4	2000	4
100 mm (3.94 in): Days with 100 mm or more rain	7	1	1940	1
10 cm (3.9 in): Days with 10 cm or more snowfall	87	8	2008	1
25 cm (9.8 in): Days with 25 cm or more snowfall	17	2	1918	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1918	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

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Data for Waukesha 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Waukesha Wwtp Threshold Days by Year (USC00478937)

Key Facts for Waukesha Wwtp Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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