Union City Threshold Days by Year (USC00409219)

20 fixed thresholds counted per year at Union City (USC00409219): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Union City Thresholds

Union City: nights with a minimum temperature at or below 0 C (32 F) in 120 years, most in 1960 with 129.
Union City: nights with a minimum temperature at or above 20 C (68 F) in 120 years, most in 1921 with 90.
Union City: days with 10 mm (0.39 in) or more of precipitation in 119 years, most in 1945 with 62.
Union City: days with 25 mm (0.98 in) or more of precipitation in 119 years, most in 1898 with 26.
20 fixed thresholds have at least one qualifying day at Union City.

Days at or above 30 C (86 F)

116 years with a qualifying day

Days per year at Union City with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 139 in 1941.

Days at or above 30 C (86 F) per year at Union City
Year	Days	Decade average
1896	98	96.3
1897	108	96.3
1898	92	96.3
1899	87	96.3
1900	80	92.7
1901	91	92.7
1909	107	92.7
1910	114	108.1
1911	132	108.1
1914	106	108.1
1915	95	108.1
1916	110	108.1
1917	101	108.1
1918	98	108.1
1919	109	108.1
1920	97	103.9
1921	126	103.9
1922	120	103.9
1925	124	103.9
1927	88	103.9
1928	85	103.9
1929	87	103.9
1930	116	115.3
1931	119	115.3
1932	107	115.3
1933	111	115.3
1934	110	115.3
1935	104	115.3
1936	125	115.3
1937	110	115.3
1938	124	115.3
1939	127	115.3
1940	108	99
1941	139	99
1942	107	99
1943	100	99
1944	114	99
1945	86	99
1946	70	99
1947	101	99
1948	90	99
1949	75	99
1950	54	92.8
1951	95	92.8
1952	100	92.8
1953	123	92.8
1954	117	92.8
1955	110	92.8
1956	98	92.8
1957	71	92.8
1958	87	92.8
1959	73	92.8
1960	60	75.1
1961	78	75.1
1962	89	75.1
1963	96	75.1
1964	92	75.1
1965	70	75.1
1966	61	75.1
1967	47	75.1
1968	74	75.1
1969	84	75.1
1970	71	75
1971	70	75
1972	80	75
1973	88	75
1974	62	75
1975	78	75
1976	61	75
1977	92	75
1978	84	75
1979	64	75
1980	100	80.9
1981	67	80.9
1982	71	80.9
1983	96	80.9
1984	72	80.9
1985	72	80.9
1986	97	80.9
1988	90	80.9
1989	63	80.9
1990	78	77.5
1991	92	77.5
1992	44	77.5
1993	86	77.5
1994	68	77.5
1995	85	77.5
1996	68	77.5
1997	65	77.5
1998	104	77.5
1999	85	77.5
2000	82	82.7
2001	73	82.7
2002	96	82.7
2003	57	82.7
2004	57	82.7
2005	95	82.7
2006	87	82.7
2007	112	82.7
2008	85	82.7
2010	111	87.2
2011	90	87.2
2012	93	87.2
2013	59	87.2
2015	71	87.2
2016	98	87.2
2017	67	87.2
2018	105	87.2
2019	91	87.2
2020	64	76
2021	62	76
2022	74	76
2023	85	76
2024	85	76
2025	91	76
2026	71	76

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

First to last qualifying date each year at Union City
Year	First date	Last date
1896	1896-04-24	1896-09-18
1897	1897-05-07	1897-10-16
1898	1898-05-18	1898-10-07
1899	1899-04-27	1899-10-15
1900	1900-05-12	1900-10-05
1901	1901-04-29	1901-10-01
1909	1909-04-16	1909-10-07
1910	1910-03-23	1910-10-20
1911	1911-03-11	1911-10-15
1914	1914-04-26	1914-10-06
1915	1915-04-20	1915-10-20
1916	1916-05-06	1916-10-15
1917	1917-04-17	1917-10-18
1918	1918-05-09	1918-10-06
1919	1919-04-22	1919-10-10
1920	1920-05-22	1920-10-22
1921	1921-04-25	1921-10-24
1922	1922-03-31	1922-10-06
1925	1925-04-15	1925-10-04
1927	1927-04-18	1927-10-28
1928	1928-05-03	1928-10-14
1929	1929-03-24	1929-09-29
1930	1930-04-30	1930-10-14
1931	1931-04-16	1931-10-27
1932	1932-04-23	1932-10-20
1933	1933-05-19	1933-11-01
1934	1934-04-05	1934-10-25
1935	1935-04-27	1935-10-16
1936	1936-04-15	1936-10-06
1937	1937-04-18	1937-10-31
1938	1938-04-26	1938-10-19
1939	1939-03-24	1939-10-24
1940	1940-04-02	1940-10-29
1941	1941-04-12	1941-10-23
1942	1942-04-28	1942-10-10
1943	1943-04-27	1943-10-01
1944	1944-05-12	1944-10-07
1945	1945-05-15	1945-09-29
1946	1946-04-22	1946-10-08
1947	1947-05-14	1947-10-25
1948	1948-05-21	1948-09-22
1949	1949-05-04	1949-10-08
1950	1950-05-18	1950-10-17
1951	1951-05-02	1951-10-07
1952	1952-05-02	1952-10-02
1953	1953-05-24	1953-10-23
1954	1954-04-26	1954-10-13
1955	1955-04-06	1955-11-14
1956	1956-05-13	1956-10-07
1957	1957-05-02	1957-09-22
1958	1958-05-16	1958-09-27
1959	1959-05-01	1959-10-05
1960	1960-05-18	1960-10-02
1961	1961-06-01	1961-10-14
1962	1962-05-09	1962-10-13
1963	1963-04-22	1963-10-28
1964	1964-05-18	1964-09-24
1965	1965-04-24	1965-09-21
1966	1966-05-08	1966-09-05
1967	1967-04-06	1967-10-06
1968	1968-05-25	1968-09-24
1969	1969-04-05	1969-10-13
1970	1970-05-22	1970-09-24
1971	1971-04-20	1971-10-04
1972	1972-05-20	1972-09-21
1973	1973-06-04	1973-10-05
1974	1974-05-18	1974-09-13
1975	1975-05-20	1975-10-14
1976	1976-06-10	1976-09-27
1977	1977-04-15	1977-10-02
1978	1978-05-24	1978-09-22
1979	1979-05-11	1979-10-22
1980	1980-04-23	1980-10-11
1981	1981-05-30	1981-10-06
1982	1982-05-14	1982-10-06
1983	1983-06-11	1983-10-04
1984	1984-05-26	1984-09-22
1985	1985-05-14	1985-10-14
1986	1986-05-08	1986-10-04
1988	1988-05-10	1988-09-24
1989	1989-04-27	1989-10-13
1990	1990-06-07	1990-09-30
1991	1991-05-18	1991-10-05
1992	1992-05-16	1992-09-15
1993	1993-05-08	1993-09-23
1994	1994-04-28	1994-09-16
1995	1995-04-10	1995-09-16
1996	1996-04-20	1996-09-09
1997	1997-05-18	1997-10-12
1998	1998-05-14	1998-10-06
1999	1999-06-02	1999-09-29
2000	2000-05-13	2000-10-06
2001	2001-04-28	2001-09-24
2002	2002-04-19	2002-10-05
2003	2003-06-18	2003-09-19
2004	2004-05-10	2004-09-16
2005	2005-05-12	2005-10-20
2006	2006-04-19	2006-10-05
2007	2007-05-01	2007-10-19
2008	2008-05-24	2008-10-12
2010	2010-05-08	2010-10-12
2011	2011-04-10	2011-09-30
2012	2012-04-27	2012-09-27
2013	2013-05-20	2013-09-20
2015	2015-06-06	2015-09-26
2016	2016-05-08	2016-10-20
2017	2017-05-12	2017-10-15
2018	2018-05-10	2018-10-09
2019	2019-05-09	2019-10-06
2020	2020-05-24	2020-09-12
2021	2021-05-24	2021-10-11
2022	2022-05-11	2022-09-24
2023	2023-04-04	2023-10-04
2024	2024-05-02	2024-10-26
2025	2025-04-29	2025-10-19
2026	2026-03-27	2026-10-01

Every Fixed Threshold

Fixed thresholds at Union City
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	116	139	1941	71
35 C (95 F): Days	105	67	1941	5
40 C (104 F): Days	16	10	1930	1
90 F (32.2 C): Days	116	111	1941	31
100 F (37.8 C): Days	55	35	1936	1
110 F (43.3 C): Days	1	1	1930	1
0 C (32 F): Ice days (max	115	35	1978	12
0 C (32 F): Frost days (min	120	129	1960	45
-10 C (14 F): Days with min	111	32	1978	11
-20 C (-4 F): Days with min	28	5	1899	1
-30 C (-22 F): Days with min	1	1	1942	1
20 C (68 F): Tropical nights (min	120	90	1921	61
25 C (77 F): Days with min	39	4	1914	1
10 mm (0.39 in): Days with 10 mm or more rain	119	62	1945	22
25 mm (0.98 in): Days with 25 mm or more rain	119	26	1898	7
50 mm (1.97 in): Days with 50 mm or more rain	115	11	1957	1
100 mm (3.94 in): Days with 100 mm or more rain	31	2	1914	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	2023	1
10 cm (3.9 in): Days with 10 cm or more snowfall	35	4	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1960	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

Data for Union City 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Union City Threshold Days by Year (USC00409219)

Key Facts for Union City Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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