Oconomowoc Wwtp Threshold Days by Year (USC00476200)

17 fixed thresholds counted per year at Oconomowoc Wwtp (USC00476200): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Oconomowoc Wwtp Thresholds

Oconomowoc Wwtp: days with 10 mm (0.39 in) or more of precipitation in 84 years, most in 2018 with 40.
Oconomowoc Wwtp: days with a maximum temperature at or above 30 C (86 F) in 83 years, most in 1988 with 51.
Oconomowoc Wwtp: days with a maximum temperature at or below 0 C (32 F) in 83 years, most in 2014 with 90.
Oconomowoc Wwtp: days with 25 mm (0.98 in) or more of precipitation in 83 years, most in 1972 with 13.
17 fixed thresholds have at least one qualifying day at Oconomowoc Wwtp.

Days at or above 30 C (86 F)

83 years with a qualifying day

Days per year at Oconomowoc Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 51 in 1988.

Days at or above 30 C (86 F) per year at Oconomowoc Wwtp
Year	Days	Decade average
1893	27	40
1894	49	40
1895	44	40
1945	28	41.2
1946	39	41.2
1947	44	41.2
1948	46	41.2
1949	49	41.2
1950	11	28.1
1951	9	28.1
1952	35	28.1
1953	36	28.1
1954	28	28.1
1955	46	28.1
1956	20	28.1
1957	27	28.1
1958	24	28.1
1959	45	28.1
1960	20	29.3
1961	29	29.3
1962	30	29.3
1963	47	29.3
1964	40	29.3
1965	24	29.3
1966	33	29.3
1967	15	29.3
1968	30	29.3
1969	25	29.3
1970	41	29.6
1972	24	29.6
1973	35	29.6
1974	17	29.6
1975	34	29.6
1976	35	29.6
1977	36	29.6
1978	29	29.6
1979	15	29.6
1980	41	27.8
1981	18	27.8
1982	10	27.8
1983	46	27.8
1984	26	27.8
1985	20	27.8
1986	13	27.8
1987	36	27.8
1988	51	27.8
1989	17	27.8
1990	11	18.5
1991	33	18.5
1992	8	18.5
1993	10	18.5
1994	14	18.5
1995	31	18.5
1996	13	18.5
1997	15	18.5
1998	21	18.5
1999	29	18.5
2000	12	22.6
2001	32	22.6
2002	39	22.6
2003	22	22.6
2004	6	22.6
2005	43	22.6
2006	20	22.6
2007	34	22.6
2008	11	22.6
2009	7	22.6
2010	26	25.4
2011	36	25.4
2012	51	25.4
2013	20	25.4
2014	5	25.4
2015	17	25.4
2016	25	25.4
2017	19	25.4
2018	30	25.4
2020	34	29.7
2021	37	29.7
2022	26	29.7
2023	28	29.7
2024	27	29.7
2025	27	29.7
2026	29	29.7

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

First to last qualifying date each year at Oconomowoc Wwtp
Year	First date	Last date
1893	1893-06-12	1893-09-21
1894	1894-05-16	1894-09-08
1895	1895-05-09	1895-09-22
1945	1945-06-23	1945-09-07
1946	1946-06-07	1946-09-09
1947	1947-06-26	1947-09-19
1948	1948-06-01	1948-09-19
1949	1949-05-03	1949-08-27
1950	1950-05-24	1950-08-16
1951	1951-06-18	1951-08-30
1952	1952-05-01	1952-09-28
1953	1953-05-29	1953-09-29
1954	1954-06-11	1954-09-06
1955	1955-05-03	1955-09-18
1956	1956-05-22	1956-08-27
1957	1957-06-15	1957-09-01
1958	1958-06-30	1958-08-31
1959	1959-05-02	1959-09-22
1960	1960-07-12	1960-09-08
1961	1961-05-13	1961-09-10
1962	1962-05-16	1962-09-12
1963	1963-06-02	1963-10-06
1964	1964-05-18	1964-09-09
1965	1965-05-02	1965-08-15
1966	1966-06-21	1966-09-01
1967	1967-05-26	1967-08-16
1968	1968-06-05	1968-09-04
1969	1969-05-28	1969-08-31
1970	1970-04-29	1970-09-08
1972	1972-05-21	1972-08-31
1973	1973-06-08	1973-09-03
1974	1974-05-22	1974-08-27
1975	1975-05-20	1975-10-14
1976	1976-06-08	1976-10-02
1977	1977-04-19	1977-08-28
1978	1978-05-26	1978-09-19
1979	1979-05-09	1979-08-08
1980	1980-04-22	1980-08-28
1981	1981-06-05	1981-09-11
1982	1982-07-04	1982-08-07
1983	1983-06-11	1983-09-10
1984	1984-06-05	1984-09-24
1985	1985-05-26	1985-09-07
1986	1986-04-26	1986-07-24
1987	1987-04-20	1987-08-15
1988	1988-05-28	1988-09-17
1989	1989-06-22	1989-08-04
1990	1990-06-12	1990-09-06
1991	1991-05-12	1991-09-09
1992	1992-05-16	1992-08-26
1993	1993-07-04	1993-08-28
1994	1994-05-23	1994-09-16
1995	1995-06-07	1995-08-31
1996	1996-05-18	1996-09-05
1997	1997-06-23	1997-10-08
1998	1998-05-18	1998-09-27
1999	1999-06-06	1999-09-06
2000	2000-06-09	2000-09-19
2001	2001-05-16	2001-08-10
2002	2002-04-16	2002-09-10
2003	2003-06-19	2003-09-09
2004	2004-06-08	2004-08-04
2005	2005-06-08	2005-10-05
2006	2006-05-29	2006-08-05
2007	2007-05-15	2007-10-08
2008	2008-06-08	2008-09-03
2009	2009-06-21	2009-08-09
2010	2010-05-24	2010-09-24
2011	2011-05-23	2011-09-03
2012	2012-05-20	2012-09-05
2013	2013-05-01	2013-09-11
2014	2014-06-01	2014-08-23
2015	2015-06-10	2015-09-07
2016	2016-06-11	2016-09-07
2017	2017-06-05	2017-09-27
2018	2018-05-26	2018-09-18
2020	2020-05-27	2020-08-29
2021	2021-06-04	2021-09-20
2022	2022-05-11	2022-08-07
2023	2023-05-31	2023-09-06
2024	2024-06-13	2024-09-22
2025	2025-06-12	2025-10-05
2026	2026-05-27	2026-10-13

Every Fixed Threshold

Fixed thresholds at Oconomowoc Wwtp
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	83	51	1988	29
35 C (95 F): Days	38	13	1988	2
90 F (32.2 C): Days	79	37	1988	12
100 F (37.8 C): Days	5	4	2012	4
0 C (32 F): Ice days (max	83	90	2014	36
0 C (32 F): Frost days (min	80	177	1976	86
-10 C (14 F): Days with min	80	83	1978	35
-20 C (-4 F): Days with min	80	38	1977	10
-30 C (-22 F): Days with min	19	6	1994	2
20 C (68 F): Tropical nights (min	79	26	1995	19
25 C (77 F): Days with min	10	2	1988	2
10 mm (0.39 in): Days with 10 mm or more rain	84	40	2018	25
25 mm (0.98 in): Days with 25 mm or more rain	83	13	1972	7
50 mm (1.97 in): Days with 50 mm or more rain	58	4	1986	2
100 mm (3.94 in): Days with 100 mm or more rain	6	1	1952	1
10 cm (3.9 in): Days with 10 cm or more snowfall	64	8	2007	1
25 cm (9.8 in): Days with 25 cm or more snowfall	7	1	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 1893.

Download the Data

Data for Oconomowoc 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).

Oconomowoc Wwtp Threshold Days by Year (USC00476200)

Key Facts for Oconomowoc Wwtp Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related