Livermore Threshold Days by Year

14 fixed thresholds counted per year at Livermore (USC00044997): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Livermore Thresholds

Livermore: days with 10 mm (0.39 in) or more of precipitation in 121 years, most in 1983 with 31.
Livermore: days with a maximum temperature at or above 30 C (86 F) in 118 years, most in 1915 with 126.
Livermore: days with a maximum temperature at or above 35 C (95 F) in 118 years, most in 2024 with 60.
Livermore: days with a maximum temperature at or above 90 F (32.2 C) in 118 years, most in 1915 with 88.
14 fixed thresholds have at least one qualifying day at Livermore.

Days at or above 30 C (86 F)

118 years with a qualifying day

Days per year at Livermore with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 126 in 1915.

Days at or above 30 C (86 F) per year at Livermore
Year	Days	Decade average
1903	85	83.3
1904	88	83.3
1905	70	83.3
1906	87	83.3
1908	91	83.3
1909	79	83.3
1910	94	77.4
1911	70	77.4
1912	72	77.4
1913	92	77.4
1914	67	77.4
1915	126	77.4
1916	78	77.4
1917	52	77.4
1919	46	77.4
1920	55	54.1
1921	61	54.1
1922	66	54.1
1923	35	54.1
1924	56	54.1
1925	28	54.1
1926	62	54.1
1927	44	54.1
1928	76	54.1
1929	58	54.1
1930	47	78.3
1931	86	78.3
1933	79	78.3
1934	69	78.3
1935	67	78.3
1936	105	78.3
1937	97	78.3
1938	65	78.3
1939	90	78.3
1940	75	76.2
1941	58	76.2
1942	82	76.2
1943	71	76.2
1944	77	76.2
1945	99	76.2
1946	67	76.2
1947	70	76.2
1948	69	76.2
1949	94	76.2
1950	104	80.4
1951	84	80.4
1952	92	80.4
1953	56	80.4
1954	70	80.4
1955	77	80.4
1956	70	80.4
1957	67	80.4
1958	98	80.4
1959	86	80.4
1960	80	80
1961	84	80
1962	72	80
1963	66	80
1964	77	80
1965	71	80
1966	74	80
1967	97	80
1968	87	80
1969	92	80
1970	93	91.6
1971	87	91.6
1974	104	91.6
1975	84	91.6
1976	80	91.6
1977	87	91.6
1978	103	91.6
1979	95	91.6
1980	75	79.2
1981	90	79.2
1982	59	79.2
1983	77	79.2
1984	101	79.2
1985	80	79.2
1986	75	79.2
1987	66	79.2
1988	92	79.2
1989	77	79.2
1990	74	76.8
1991	82	76.8
1992	94	76.8
1993	75	76.8
1994	74	76.8
1995	66	76.8
1996	95	76.8
1997	77	76.8
1998	66	76.8
1999	65	76.8
2000	74	83.4
2001	96	83.4
2002	80	83.4
2003	92	83.4
2004	83	83.4
2005	80	83.4
2006	85	83.4
2007	70	83.4
2008	94	83.4
2009	80	83.4
2010	73	86.5
2011	76	86.5
2012	96	86.5
2013	84	86.5
2014	107	86.5
2015	90	86.5
2016	89	86.5
2017	92	86.5
2018	78	86.5
2019	80	86.5
2021	108	104.8
2022	116	104.8
2023	98	104.8
2024	118	104.8
2025	95	104.8
2026	94	104.8

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

First to last qualifying date each year at Livermore
Year	First date	Last date
1903	1903-05-01	1903-10-21
1904	1904-04-09	1904-10-05
1905	1905-05-14	1905-10-28
1906	1906-04-19	1906-10-28
1908	1908-04-09	1908-11-08
1909	1909-04-27	1909-10-25
1910	1910-04-17	1910-10-28
1911	1911-03-30	1911-10-25
1912	1912-05-13	1912-10-18
1913	1913-04-10	1913-10-27
1914	1914-03-17	1914-10-30
1915	1915-03-20	1915-11-01
1916	1916-04-30	1916-09-28
1917	1917-06-07	1917-11-04
1919	1919-05-13	1919-09-25
1920	1920-05-16	1920-09-29
1921	1921-04-27	1921-10-19
1922	1922-05-03	1922-09-25
1923	1923-05-08	1923-09-17
1924	1924-04-06	1924-10-03
1925	1925-05-02	1925-08-25
1926	1926-04-24	1926-10-05
1927	1927-04-24	1927-10-13
1928	1928-04-29	1928-10-19
1929	1929-05-11	1929-10-23
1930	1930-05-19	1930-10-18
1931	1931-04-16	1931-11-07
1933	1933-04-14	1933-10-26
1934	1934-04-06	1934-10-27
1935	1935-05-04	1935-10-07
1936	1936-05-07	1936-10-14
1937	1937-05-12	1937-10-25
1938	1938-04-18	1938-09-21
1939	1939-04-06	1939-10-22
1940	1940-05-09	1940-10-20
1941	1941-05-10	1941-10-17
1942	1942-05-19	1942-10-24
1943	1943-05-07	1943-10-15
1944	1944-05-02	1944-10-27
1945	1945-04-20	1945-10-07
1946	1946-04-22	1946-10-25
1947	1947-04-12	1947-10-04
1948	1948-06-20	1948-10-18
1949	1949-04-12	1949-11-04
1950	1950-04-18	1950-10-23
1951	1951-04-10	1951-10-15
1952	1952-05-17	1952-10-18
1953	1953-05-05	1953-10-28
1954	1954-04-17	1954-10-22
1955	1955-05-11	1955-11-11
1956	1956-05-16	1956-10-07
1957	1957-04-29	1957-09-24
1958	1958-05-16	1958-10-17
1959	1959-04-04	1959-10-26
1960	1960-05-11	1960-10-06
1961	1961-06-14	1961-10-19
1962	1962-04-14	1962-10-02
1963	1963-05-17	1963-10-02
1964	1964-04-15	1964-10-23
1965	1965-04-28	1965-10-27
1966	1966-04-16	1966-10-26
1967	1967-05-16	1967-11-04
1968	1968-04-10	1968-10-27
1969	1969-04-27	1969-10-01
1970	1970-05-01	1970-10-11
1971	1971-06-14	1971-10-13
1974	1974-05-07	1974-10-19
1975	1975-05-12	1975-10-21
1976	1976-04-30	1976-11-05
1977	1977-04-06	1977-10-18
1978	1978-05-08	1978-10-24
1979	1979-05-11	1979-10-03
1980	1980-05-17	1980-10-09
1981	1981-04-23	1981-10-01
1982	1982-05-22	1982-10-14
1983	1983-05-18	1983-10-28
1984	1984-04-14	1984-10-07
1985	1985-04-13	1985-10-05
1986	1986-04-20	1986-10-09
1987	1987-04-15	1987-10-18
1988	1988-03-26	1988-11-05
1989	1989-04-06	1989-10-19
1990	1990-04-12	1990-10-12
1991	1991-05-23	1991-10-21
1992	1992-04-25	1992-10-12
1993	1993-05-01	1993-10-26
1994	1994-05-29	1994-10-09
1995	1995-05-28	1995-10-19
1996	1996-04-26	1996-10-09
1997	1997-04-26	1997-10-18
1998	1998-04-29	1998-09-19
1999	1999-04-16	1999-10-22
2000	2000-04-02	2000-09-30
2001	2001-04-25	2001-10-15
2002	2002-04-13	2002-10-14
2003	2003-05-19	2003-10-28
2004	2004-03-18	2004-10-14
2005	2005-05-24	2005-10-17
2006	2006-05-01	2006-10-23
2007	2007-04-27	2007-09-27
2008	2008-04-13	2008-10-23
2009	2009-04-19	2009-09-28
2010	2010-05-30	2010-10-15
2011	2011-05-04	2011-10-18
2012	2012-04-20	2012-10-18
2013	2013-04-10	2013-10-20
2014	2014-04-10	2014-10-13
2015	2015-04-30	2015-10-31
2016	2016-04-18	2016-10-09
2017	2017-05-01	2017-10-27
2018	2018-05-28	2018-10-20
2019	2019-04-23	2019-10-25
2021	2021-04-01	2021-10-16
2022	2022-03-22	2022-10-21
2023	2023-04-25	2023-11-02
2024	2024-04-11	2024-10-23
2025	2025-03-25	2025-10-07
2026	2026-03-18	2026-10-08

Every Fixed Threshold

Fixed thresholds at Livermore
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	118	126	1915	94
35 C (95 F): Days	118	60	2024	26
40 C (104 F): Days	104	18	2024	1
45 C (113 F): Days	5	3	2022	3
90 F (32.2 C): Days	118	88	1915	60
100 F (37.8 C): Days	115	41	2024	7
110 F (43.3 C): Days	21	6	1950	5
0 C (32 F): Frost days (min	117	68	1964	6
20 C (68 F): Tropical nights (min	48	9	1947	2
25 C (77 F): Days with min	1	1	2006	1
10 mm (0.39 in): Days with 10 mm or more rain	121	31	1983	6
25 mm (0.98 in): Days with 25 mm or more rain	90	7	1983	3
50 mm (1.97 in): Days with 50 mm or more rain	18	2	1911	1
100 mm (3.94 in): Days with 100 mm or more rain	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 1903.

Download the Data

Data for Livermore 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Livermore Threshold Days by Year

Key Facts for Livermore Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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