Iron Mtn-Kingsford Wwtp Threshold Days by Year (USC00204090)

19 fixed thresholds counted per year at Iron Mtn-Kingsford Wwtp (USC00204090): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Iron Mtn-Kingsford Wwtp Thresholds

Iron Mtn-Kingsford Wwtp: days with a maximum temperature at or above 30 C (86 F) in 125 years, most in 1988 with 40.
Iron Mtn-Kingsford Wwtp: days with a maximum temperature at or below 0 C (32 F) in 125 years, most in 1955 with 109.
Iron Mtn-Kingsford Wwtp: nights with a minimum temperature at or below 0 C (32 F) in 125 years, most in 1943 with 206.
Iron Mtn-Kingsford Wwtp: nights with a minimum temperature at or below -10 C (14 F) in 125 years, most in 1989 with 109.
19 fixed thresholds have at least one qualifying day at Iron Mtn-Kingsford Wwtp.

Days at or above 30 C (86 F)

125 years with a qualifying day

Days per year at Iron Mtn-Kingsford Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1988.

Days at or above 30 C (86 F) per year at Iron Mtn-Kingsford Wwtp
Year	Days	Decade average
1899	11	11
1902	8	11
1903	5	11
1904	5	11
1905	6	11
1906	13	11
1907	11	11
1908	24	11
1909	16	11
1911	24	17.3
1912	17	17.3
1913	20	17.3
1914	17	17.3
1915	5	17.3
1916	25	17.3
1917	12	17.3
1918	10	17.3
1919	26	17.3
1920	10	16
1921	36	16
1922	14	16
1923	17	16
1924	8	16
1925	26	16
1926	15	16
1927	10	16
1928	9	16
1929	15	16
1930	21	21.6
1931	30	21.6
1932	17	21.6
1933	24	21.6
1934	30	21.6
1935	18	21.6
1936	20	21.6
1937	23	21.6
1938	14	21.6
1939	19	21.6
1940	9	17
1941	24	17
1942	7	17
1943	18	17
1944	22	17
1945	12	17
1946	6	17
1947	29	17
1948	17	17
1949	26	17
1950	6	12.6
1951	3	12.6
1952	15	12.6
1953	16	12.6
1954	10	12.6
1955	25	12.6
1956	6	12.6
1957	19	12.6
1958	6	12.6
1959	20	12.6
1960	6	13.6
1961	11	13.6
1962	12	13.6
1963	21	13.6
1964	24	13.6
1965	9	13.6
1966	24	13.6
1967	2	13.6
1968	11	13.6
1969	16	13.6
1970	21	14.9
1971	11	14.9
1972	9	14.9
1973	12	14.9
1974	7	14.9
1975	29	14.9
1976	23	14.9
1977	17	14.9
1978	13	14.9
1979	7	14.9
1980	24	20.1
1981	8	20.1
1982	4	20.1
1983	37	20.1
1984	8	20.1
1985	6	20.1
1986	17	20.1
1987	31	20.1
1988	40	20.1
1989	26	20.1
1990	12	15.5
1991	27	15.5
1992	7	15.5
1993	7	15.5
1994	11	15.5
1995	19	15.5
1996	6	15.5
1997	15	15.5
1998	24	15.5
1999	27	15.5
2000	8	18.4
2001	22	18.4
2002	28	18.4
2003	21	18.4
2004	5	18.4
2005	30	18.4
2006	25	18.4
2007	25	18.4
2008	11	18.4
2009	9	18.4
2010	19	19
2011	27	19
2012	29	19
2013	19	19
2014	10	19
2015	11	19
2016	23	19
2017	14	19
2018	24	19
2019	14	19
2020	20	18.3
2021	21	18.3
2022	15	18.3
2023	20	18.3
2024	16	18.3
2025	17	18.3
2026	19	18.3

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

First to last qualifying date each year at Iron Mtn-Kingsford Wwtp
Year	First date	Last date
1899	1899-06-04	1899-09-02
1902	1902-05-19	1902-08-29
1903	1903-06-27	1903-07-24
1904	1904-06-24	1904-07-19
1905	1905-06-14	1905-09-28
1906	1906-05-17	1906-09-11
1907	1907-06-14	1907-08-30
1908	1908-06-20	1908-09-22
1909	1909-06-20	1909-08-25
1911	1911-05-19	1911-09-23
1912	1912-06-23	1912-09-09
1913	1913-06-13	1913-09-01
1914	1914-05-25	1914-09-20
1915	1915-04-24	1915-09-05
1916	1916-07-01	1916-08-21
1917	1917-07-08	1917-07-31
1918	1918-05-05	1918-08-22
1919	1919-05-28	1919-09-08
1920	1920-05-31	1920-09-24
1921	1921-05-20	1921-09-02
1922	1922-05-11	1922-10-05
1923	1923-06-01	1923-07-31
1924	1924-07-11	1924-08-31
1925	1925-05-22	1925-09-17
1926	1926-05-01	1926-08-28
1927	1927-06-28	1927-09-17
1928	1928-07-02	1928-08-16
1929	1929-05-29	1929-09-04
1930	1930-05-21	1930-09-11
1931	1931-05-15	1931-09-13
1932	1932-05-14	1932-08-30
1933	1933-06-02	1933-09-06
1934	1934-05-06	1934-08-19
1935	1935-06-30	1935-08-15
1936	1936-05-07	1936-09-06
1937	1937-05-30	1937-09-23
1938	1938-06-20	1938-08-18
1939	1939-05-30	1939-09-16
1940	1940-06-02	1940-08-13
1941	1941-05-19	1941-09-21
1942	1942-07-12	1942-08-31
1943	1943-06-03	1943-08-13
1944	1944-05-30	1944-08-15
1945	1945-06-22	1945-09-07
1946	1946-06-06	1946-08-16
1947	1947-06-28	1947-10-15
1948	1948-05-20	1948-09-17
1949	1949-05-03	1949-08-26
1950	1950-06-07	1950-07-29
1951	1951-06-27	1951-07-26
1952	1952-04-27	1952-09-13
1953	1953-05-09	1953-09-03
1954	1954-06-09	1954-08-24
1955	1955-05-03	1955-09-18
1956	1956-06-09	1956-06-21
1957	1957-06-10	1957-08-08
1958	1958-06-29	1958-08-09
1959	1959-06-03	1959-09-07
1960	1960-07-08	1960-09-07
1961	1961-06-28	1961-09-09
1962	1962-04-25	1962-08-28
1963	1963-06-02	1963-08-07
1964	1964-05-07	1964-08-02
1965	1965-05-25	1965-08-14
1966	1966-06-23	1966-09-01
1967	1967-07-21	1967-08-25
1968	1968-06-05	1968-08-23
1969	1969-05-27	1969-08-30
1970	1970-05-18	1970-08-14
1971	1971-06-04	1971-09-03
1972	1972-05-17	1972-08-30
1973	1973-06-10	1973-09-02
1974	1974-06-28	1974-07-18
1975	1975-05-18	1975-08-24
1976	1976-06-07	1976-09-13
1977	1977-05-12	1977-08-27
1978	1978-05-18	1978-09-07
1979	1979-06-15	1979-07-24
1980	1980-04-22	1980-08-23
1981	1981-07-06	1981-08-03
1982	1982-07-16	1982-08-16
1983	1983-06-13	1983-09-29
1984	1984-07-13	1984-08-30
1985	1985-07-09	1985-08-09
1986	1986-05-29	1986-09-02
1987	1987-05-17	1987-08-17
1988	1988-05-27	1988-08-17
1989	1989-06-08	1989-08-13
1990	1990-04-25	1990-09-05
1991	1991-05-12	1991-08-31
1992	1992-06-12	1992-10-03
1993	1993-06-22	1993-08-26
1994	1994-05-21	1994-08-26
1995	1995-06-06	1995-08-31
1996	1996-05-19	1996-07-18
1997	1997-06-11	1997-08-08
1998	1998-05-19	1998-09-20
1999	1999-05-29	1999-09-05
2000	2000-05-06	2000-09-19
2001	2001-06-26	2001-08-10
2002	2002-04-17	2002-09-10
2003	2003-04-15	2003-08-26
2004	2004-06-08	2004-07-20
2005	2005-06-10	2005-09-14
2006	2006-05-29	2006-08-07
2007	2007-05-11	2007-10-08
2008	2008-06-26	2008-09-03
2009	2009-05-21	2009-08-14
2010	2010-05-21	2010-08-31
2011	2011-06-05	2011-09-13
2012	2012-05-19	2012-08-31
2013	2013-05-31	2013-09-08
2014	2014-05-26	2014-07-23
2015	2015-07-19	2015-09-02
2016	2016-05-07	2016-08-19
2017	2017-06-11	2017-09-26
2018	2018-05-17	2018-09-18
2019	2019-06-01	2019-07-29
2020	2020-06-03	2020-08-25
2021	2021-06-05	2021-08-26
2022	2022-05-13	2022-09-02
2023	2023-05-31	2023-09-05
2024	2024-06-19	2024-09-18
2025	2025-06-03	2025-09-17
2026	2026-05-27	2026-09-02

Every Fixed Threshold

Fixed thresholds at Iron Mtn-Kingsford Wwtp
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	125	40	1988	19
35 C (95 F): Days	54	10	1988	2
40 C (104 F): Days	1	1	1917	1
90 F (32.2 C): Days	113	27	1988	7
100 F (37.8 C): Days	11	6	1936	1
0 C (32 F): Ice days (max	125	109	1955	45
0 C (32 F): Frost days (min	125	206	1943	110
-10 C (14 F): Days with min	125	109	1989	52
-20 C (-4 F): Days with min	125	52	2014	16
-30 C (-22 F): Days with min	76	11	1994	1
20 C (68 F): Tropical nights (min	85	17	1921	3
25 C (77 F): Days with min	6	3	1918	1
10 mm (0.39 in): Days with 10 mm or more rain	117	37	1951	20
25 mm (0.98 in): Days with 25 mm or more rain	117	11	1951	5
50 mm (1.97 in): Days with 50 mm or more rain	49	3	1923	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1999	1
10 cm (3.9 in): Days with 10 cm or more snowfall	97	12	1972	2
25 cm (9.8 in): Days with 25 cm or more snowfall	24	2	1959	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	0	n/a	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

Download the Data

Data for Iron Mtn-Kingsford 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).

Iron Mtn-Kingsford Wwtp Threshold Days by Year (USC00204090)

Key Facts for Iron Mtn-Kingsford Wwtp Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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