Ukiah Threshold Days by Year (USC00049122)

15 fixed thresholds counted per year at Ukiah (USC00049122): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ukiah Thresholds

Ukiah: nights with a minimum temperature at or below 0 C (32 F) in 108 years, most in 1917 with 100.
Ukiah: days with 10 mm (0.39 in) or more of precipitation in 108 years, most in 1983 with 60.
Ukiah: days with 25 mm (0.98 in) or more of precipitation in 108 years, most in 1983 with 26.
Ukiah: days with a maximum temperature at or above 30 C (86 F) in 107 years, most in 1970 with 126.
15 fixed thresholds have at least one qualifying day at Ukiah.

Days at or above 30 C (86 F)

107 years with a qualifying day

Days per year at Ukiah with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 126 in 1970.

Days at or above 30 C (86 F) per year at Ukiah
Year	Days	Decade average
1893	50	70.3
1894	70	70.3
1895	77	70.3
1896	65	70.3
1897	72	70.3
1898	64	70.3
1899	94	70.3
1900	95	94.9
1901	83	94.9
1903	106	94.9
1904	117	94.9
1905	83	94.9
1906	96	94.9
1907	79	94.9
1908	94	94.9
1909	101	94.9
1910	112	96.9
1911	100	96.9
1912	79	96.9
1913	98	96.9
1914	87	96.9
1915	91	96.9
1916	85	96.9
1917	107	96.9
1918	112	96.9
1919	98	96.9
1920	83	98.2
1921	102	98.2
1922	101	98.2
1923	74	98.2
1925	95	98.2
1926	121	98.2
1927	96	98.2
1928	107	98.2
1929	105	98.2
1930	105	107.1
1931	111	107.1
1932	123	107.1
1933	102	107.1
1934	106	107.1
1935	106	107.1
1936	113	107.1
1937	97	107.1
1938	96	107.1
1939	112	107.1
1940	96	94.7
1941	74	94.7
1942	97	94.7
1943	90	94.7
1944	100	94.7
1945	110	94.7
1946	87	94.7
1947	95	94.7
1948	84	94.7
1949	114	94.7
1950	114	104.4
1951	124	104.4
1952	122	104.4
1953	89	104.4
1954	84	104.4
1955	114	104.4
1956	101	104.4
1957	90	104.4
1958	110	104.4
1959	96	104.4
1960	110	101.2
1961	106	101.2
1962	99	101.2
1963	82	101.2
1964	90	101.2
1965	101	101.2
1966	108	101.2
1967	119	101.2
1968	94	101.2
1969	103	101.2
1970	126	100.4
1971	98	100.4
1972	102	100.4
1973	105	100.4
1974	117	100.4
1975	104	100.4
1976	76	100.4
1977	91	100.4
1978	93	100.4
1979	92	100.4
1980	86	91.6
1981	101	91.6
1982	86	91.6
1983	73	91.6
1984	97	91.6
1986	88	91.6
1987	107	91.6
1988	95	91.6
1990	64	79
1991	108	79
1992	99	79
1993	72	79
1994	87	79
1995	75	79
1996	95	79
1997	72	79
1998	66	79
1999	52	79
2000	87	87.3
2003	88	87.3
2006	91	87.3
2007	83	87.3

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

First to last qualifying date each year at Ukiah
Year	First date	Last date
1893	1893-05-10	1893-08-31
1894	1894-05-06	1894-10-15
1895	1895-04-22	1895-10-11
1896	1896-05-25	1896-10-06
1897	1897-04-14	1897-10-11
1898	1898-04-11	1898-09-17
1899	1899-05-09	1899-10-08
1900	1900-04-16	1900-10-09
1901	1901-05-10	1901-10-22
1903	1903-04-24	1903-10-22
1904	1904-04-07	1904-10-04
1905	1905-05-15	1905-10-25
1906	1906-04-19	1906-10-27
1907	1907-04-19	1907-10-16
1908	1908-04-08	1908-10-07
1909	1909-04-09	1909-10-14
1910	1910-04-15	1910-10-26
1911	1911-03-28	1911-10-20
1912	1912-05-12	1912-10-03
1913	1913-04-23	1913-10-28
1914	1914-03-15	1914-09-23
1915	1915-05-27	1915-10-08
1916	1916-03-10	1916-09-29
1917	1917-04-05	1917-10-26
1918	1918-03-30	1918-10-30
1919	1919-04-25	1919-10-16
1920	1920-04-26	1920-10-04
1921	1921-04-27	1921-10-20
1922	1922-04-24	1922-09-30
1923	1923-03-25	1923-10-01
1925	1925-03-21	1925-10-29
1926	1926-03-13	1926-10-25
1927	1927-04-22	1927-10-22
1928	1928-05-04	1928-10-19
1929	1929-05-10	1929-11-03
1930	1930-03-25	1930-11-02
1931	1931-04-09	1931-11-03
1932	1932-02-26	1932-11-18
1933	1933-04-02	1933-10-26
1934	1934-03-09	1934-10-11
1935	1935-05-04	1935-10-27
1936	1936-04-10	1936-11-19
1937	1937-04-20	1937-10-25
1938	1938-05-12	1938-09-22
1939	1939-04-05	1939-10-30
1940	1940-04-11	1940-10-19
1941	1941-05-10	1941-10-17
1942	1942-05-19	1942-10-23
1943	1943-04-13	1943-10-14
1944	1944-05-02	1944-10-26
1945	1945-04-17	1945-11-03
1946	1946-04-23	1946-10-25
1947	1947-04-11	1947-10-12
1948	1948-05-22	1948-10-21
1949	1949-04-09	1949-11-04
1950	1950-04-18	1950-11-03
1951	1951-04-08	1951-10-14
1952	1952-03-25	1952-10-17
1953	1953-04-21	1953-10-08
1954	1954-04-15	1954-10-15
1955	1955-03-26	1955-11-10
1956	1956-04-18	1956-10-07
1957	1957-04-27	1957-09-24
1958	1958-04-11	1958-10-29
1959	1959-04-08	1959-10-25
1960	1960-03-18	1960-10-30
1961	1961-04-02	1961-10-18
1962	1962-04-11	1962-10-01
1963	1963-05-16	1963-10-03
1964	1964-04-13	1964-10-22
1965	1965-04-25	1965-10-31
1966	1966-03-30	1966-11-02
1967	1967-05-07	1967-11-02
1968	1968-03-29	1968-10-27
1969	1969-05-05	1969-10-21
1970	1970-03-25	1970-10-11
1971	1971-05-10	1971-10-13
1972	1972-03-15	1972-10-06
1973	1973-04-25	1973-10-30
1974	1974-04-29	1974-10-21
1975	1975-05-12	1975-10-20
1976	1976-05-07	1976-11-04
1977	1977-04-06	1977-10-14
1978	1978-04-09	1978-10-25
1979	1979-05-12	1979-10-05
1980	1980-05-18	1980-10-09
1981	1981-04-22	1981-10-19
1982	1982-05-04	1982-10-14
1983	1983-05-17	1983-09-25
1984	1984-04-14	1984-10-07
1986	1986-04-20	1986-10-09
1987	1987-04-15	1987-10-08
1988	1988-04-10	1988-10-23
1990	1990-04-12	1990-10-11
1991	1991-05-22	1991-10-21
1992	1992-04-01	1992-10-12
1993	1993-05-09	1993-10-27
1994	1994-04-15	1994-10-15
1995	1995-05-28	1995-10-20
1996	1996-04-28	1996-10-11
1997	1997-05-09	1997-10-16
1998	1998-04-21	1998-09-16
1999	1999-04-14	1999-10-16
2000	2000-04-01	2000-10-07
2003	2003-05-21	2003-10-28
2006	2006-04-26	2006-10-20
2007	2007-04-27	2007-09-26

Every Fixed Threshold

Fixed thresholds at Ukiah
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	107	126	1970	83
35 C (95 F): Days	107	70	1931	19
40 C (104 F): Days	100	22	1932	1
45 C (113 F): Days	6	3	1955	1
90 F (32.2 C): Days	107	100	1970	48
100 F (37.8 C): Days	106	38	1960	5
110 F (43.3 C): Days	33	4	1961	2
0 C (32 F): Frost days (min	108	100	1917	48
-10 C (14 F): Days with min	4	1	1898	1
20 C (68 F): Tropical nights (min	26	5	1984	4
10 mm (0.39 in): Days with 10 mm or more rain	108	60	1983	23
25 mm (0.98 in): Days with 25 mm or more rain	108	26	1983	11
50 mm (1.97 in): Days with 50 mm or more rain	90	8	1995	3
100 mm (3.94 in): Days with 100 mm or more rain	19	3	1995	1
10 cm (3.9 in): Days with 10 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 1893.

Download the Data

Data for Ukiah 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Ukiah Threshold Days by Year (USC00049122)

Key Facts for Ukiah Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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