San Jose Threshold Days by Year

11 fixed thresholds counted per year at San Jose (USC00047821): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for San Jose Thresholds

San Jose: days with 10 mm (0.39 in) or more of precipitation in 117 years, most in 1983 with 33.
San Jose: days with a maximum temperature at or above 30 C (86 F) in 107 years, most in 1996 with 62.
San Jose: days with a maximum temperature at or above 90 F (32.2 C) in 107 years, most in 1996 with 43.
San Jose: days with a maximum temperature at or above 35 C (95 F) in 100 years, most in 1996 with 16.
11 fixed thresholds have at least one qualifying day at San Jose.

Days at or above 30 C (86 F)

107 years with a qualifying day

Days per year at San Jose with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 62 in 1996.

Days at or above 30 C (86 F) per year at San Jose
Year	Days	Decade average
1893	12	21
1894	22	21
1895	28	21
1896	22	21
1904	40	25.3
1907	11	25.3
1908	25	25.3
1909	25	25.3
1910	27	25.8
1911	16	25.8
1912	24	25.8
1913	35	25.8
1914	17	25.8
1915	25	25.8
1916	25	25.8
1917	41	25.8
1918	24	25.8
1919	24	25.8
1920	27	26.1
1921	33	26.1
1922	34	26.1
1923	20	26.1
1924	23	26.1
1925	19	26.1
1926	37	26.1
1927	21	26.1
1928	19	26.1
1929	28	26.1
1930	16	32.4
1931	38	32.4
1932	29	32.4
1933	32	32.4
1934	30	32.4
1935	28	32.4
1936	54	32.4
1937	32	32.4
1938	27	32.4
1939	38	32.4
1940	22	27
1941	29	27
1942	20	27
1943	28	27
1944	29	27
1945	35	27
1946	28	27
1947	39	27
1948	17	27
1949	23	27
1950	37	28.5
1951	19	28.5
1952	27	28.5
1953	31	28.5
1954	27	28.5
1955	25	28.5
1956	20	28.5
1957	33	28.5
1958	31	28.5
1959	35	28.5
1960	37	34.6
1961	40	34.6
1962	21	34.6
1964	29	34.6
1965	23	34.6
1966	42	34.6
1967	47	34.6
1968	32	34.6
1969	40	34.6
1970	46	37.4
1971	39	37.4
1972	33	37.4
1973	42	37.4
1974	33	37.4
1975	34	37.4
1976	38	37.4
1977	26	37.4
1978	44	37.4
1979	39	37.4
1980	27	38.2
1981	36	38.2
1982	21	38.2
1983	38	38.2
1984	55	38.2
1985	47	38.2
1986	29	38.2
1987	41	38.2
1988	50	38.2
1989	38	38.2
1990	33	41.7
1991	28	41.7
1992	32	41.7
1993	41	41.7
1996	62	41.7
1997	45	41.7
1998	51	41.7
2003	33	28
2004	28	28
2005	23	28
2006	28	28
2018	32	35
2019	38	35
2020	56	37.3
2021	24	37.3
2022	37	37.3
2023	35	37.3
2024	55	37.3
2025	22	37.3
2026	32	37.3

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

First to last qualifying date each year at San Jose
Year	First date	Last date
1893	1893-06-02	1893-08-10
1894	1894-06-30	1894-10-05
1895	1895-05-10	1895-09-27
1896	1896-05-25	1896-09-03
1904	1904-04-08	1904-10-04
1907	1907-05-26	1907-10-04
1908	1908-04-10	1908-10-07
1909	1909-05-31	1909-10-10
1910	1910-04-22	1910-10-08
1911	1911-05-20	1911-10-18
1912	1912-05-31	1912-10-02
1913	1913-04-10	1913-10-25
1914	1914-03-17	1914-10-27
1915	1915-05-27	1915-10-05
1916	1916-05-01	1916-09-27
1917	1917-06-12	1917-10-26
1918	1918-04-20	1918-10-13
1919	1919-05-27	1919-10-12
1920	1920-05-18	1920-09-28
1921	1921-04-27	1921-10-19
1922	1922-05-13	1922-09-18
1923	1923-05-08	1923-10-19
1924	1924-04-06	1924-10-03
1925	1925-05-02	1925-09-22
1926	1926-04-24	1926-10-27
1927	1927-04-23	1927-10-19
1928	1928-05-04	1928-10-08
1929	1929-05-11	1929-10-23
1930	1930-06-05	1930-10-06
1931	1931-04-20	1931-10-01
1932	1932-05-25	1932-09-14
1933	1933-04-14	1933-10-18
1934	1934-04-06	1934-10-10
1935	1935-05-20	1935-09-18
1936	1936-04-11	1936-10-09
1937	1937-06-02	1937-10-21
1938	1938-05-24	1938-10-25
1939	1939-04-06	1939-10-30
1940	1940-04-12	1940-10-18
1941	1941-05-09	1941-10-03
1942	1942-05-19	1942-10-21
1943	1943-05-09	1943-10-14
1944	1944-05-02	1944-10-25
1945	1945-04-29	1945-10-02
1946	1946-04-23	1946-10-11
1947	1947-04-12	1947-10-04
1948	1948-06-21	1948-09-13
1949	1949-05-06	1949-10-30
1950	1950-04-18	1950-10-13
1951	1951-05-25	1951-10-08
1952	1952-05-17	1952-10-02
1953	1953-05-04	1953-10-06
1954	1954-04-15	1954-10-15
1955	1955-05-18	1955-10-13
1956	1956-05-15	1956-09-29
1957	1957-04-03	1957-09-22
1958	1958-05-15	1958-10-16
1959	1959-05-07	1959-10-24
1960	1960-04-03	1960-10-05
1961	1961-04-04	1961-10-17
1962	1962-04-12	1962-10-01
1964	1964-04-14	1964-10-21
1965	1965-04-26	1965-10-25
1966	1966-04-15	1966-10-10
1967	1967-05-15	1967-10-17
1968	1968-06-01	1968-09-26
1969	1969-05-05	1969-09-26
1970	1970-05-02	1970-10-02
1971	1971-06-15	1971-10-13
1972	1972-04-27	1972-10-07
1973	1973-05-11	1973-09-29
1974	1974-05-26	1974-10-18
1975	1975-05-12	1975-09-26
1976	1976-05-12	1976-10-13
1977	1977-06-05	1977-09-08
1978	1978-05-18	1978-10-14
1979	1979-05-12	1979-09-17
1980	1980-06-27	1980-10-09
1981	1981-04-28	1981-10-01
1982	1982-05-23	1982-09-12
1983	1983-05-18	1983-09-21
1984	1984-04-14	1984-09-28
1985	1985-04-13	1985-10-05
1986	1986-04-20	1986-10-06
1987	1987-04-15	1987-10-06
1988	1988-04-09	1988-10-17
1989	1989-04-05	1989-10-09
1990	1990-04-13	1990-10-10
1991	1991-05-24	1991-10-20
1992	1992-05-02	1992-10-10
1993	1993-05-01	1993-10-26
1996	1996-04-29	1996-10-09
1997	1997-05-15	1997-10-16
1998	1998-04-21	1998-10-07
2003	2003-05-20	2003-10-28
2004	2004-04-25	2004-10-14
2005	2005-03-11	2005-09-30
2006	2006-05-10	2006-09-25
2018	2018-05-28	2018-09-26
2019	2019-04-23	2019-10-25
2020	2020-05-07	2020-10-21
2021	2021-06-16	2021-10-16
2022	2022-04-07	2022-10-19
2023	2023-04-27	2023-10-19
2024	2024-05-09	2024-10-08
2025	2025-05-09	2025-10-07
2026	2026-03-18	2026-10-08

Every Fixed Threshold

Fixed thresholds at San Jose
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	107	62	1996	32
35 C (95 F): Days	100	16	1996	5
40 C (104 F): Days	14	3	2022	1
90 F (32.2 C): Days	107	43	1996	13
100 F (37.8 C): Days	54	5	1913	5
0 C (32 F): Frost days (min	92	58	1893	1
20 C (68 F): Tropical nights (min	32	9	2006	1
10 mm (0.39 in): Days with 10 mm or more rain	117	33	1983	7
25 mm (0.98 in): Days with 25 mm or more rain	93	7	1983	1
50 mm (1.97 in): Days with 50 mm or more rain	16	3	1911	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1918	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 San Jose 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).

San Jose Threshold Days by Year

Key Facts for San Jose Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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