Tustin Irvine Rch Threshold Days by Year (USC00049087)

13 fixed thresholds counted per year at Tustin Irvine Rch (USC00049087): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tustin Irvine Rch Thresholds

Tustin Irvine Rch: days with a maximum temperature at or above 30 C (86 F) in 83 years, most in 1997 with 137.
Tustin Irvine Rch: days with a maximum temperature at or above 35 C (95 F) in 83 years, most in 1997 with 57.
Tustin Irvine Rch: days with a maximum temperature at or above 90 F (32.2 C) in 83 years, most in 1997 with 92.
Tustin Irvine Rch: days with 10 mm (0.39 in) or more of precipitation in 82 years, most in 1978 with 28.
13 fixed thresholds have at least one qualifying day at Tustin Irvine Rch.

Days at or above 30 C (86 F)

83 years with a qualifying day

Days per year at Tustin Irvine Rch with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 137 in 1997.

Days at or above 30 C (86 F) per year at Tustin Irvine Rch
Year	Days	Decade average
1915	44	38.4
1916	16	38.4
1917	44	38.4
1918	45	38.4
1919	43	38.4
1920	37	55.5
1921	40	55.5
1922	52	55.5
1923	26	55.5
1924	52	55.5
1925	51	55.5
1926	50	55.5
1927	77	55.5
1928	82	55.5
1929	88	55.5
1930	69	61.7
1931	106	61.7
1932	45	61.7
1933	52	61.7
1934	104	61.7
1935	55	61.7
1936	36	61.7
1937	43	61.7
1938	51	61.7
1939	56	61.7
1940	59	50.1
1941	51	50.1
1942	37	50.1
1944	30	50.1
1945	61	50.1
1946	62	50.1
1947	61	50.1
1948	30	50.1
1949	60	50.1
1950	44	52.2
1951	45	52.2
1952	54	52.2
1953	46	52.2
1954	49	52.2
1955	40	52.2
1956	50	52.2
1957	58	52.2
1958	71	52.2
1959	65	52.2
1960	66	45.9
1961	45	45.9
1962	31	45.9
1963	38	45.9
1964	38	45.9
1965	36	45.9
1966	51	45.9
1967	53	45.9
1968	48	45.9
1969	53	45.9
1970	52	49.6
1971	61	49.6
1972	31	49.6
1973	31	49.6
1974	49	49.6
1975	31	49.6
1976	55	49.6
1977	47	49.6
1978	61	49.6
1979	78	49.6
1981	63	51.3
1983	59	51.3
1984	77	51.3
1985	54	51.3
1986	40	51.3
1987	38	51.3
1988	39	51.3
1989	40	51.3
1990	59	75.4
1991	36	75.4
1992	63	75.4
1993	45	75.4
1994	72	75.4
1996	96	75.4
1997	137	75.4
1998	89	75.4
1999	82	75.4
2000	34	39.5
2002	45	39.5

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

First to last qualifying date each year at Tustin Irvine Rch
Year	First date	Last date
1915	1915-03-14	1915-11-19
1916	1916-02-14	1916-11-09
1917	1917-04-04	1917-12-28
1918	1918-03-30	1918-12-03
1919	1919-06-01	1919-12-28
1920	1920-01-17	1920-10-25
1921	1921-02-24	1921-11-05
1922	1922-04-19	1922-10-23
1923	1923-01-09	1923-10-20
1924	1924-02-12	1924-11-29
1925	1925-03-01	1925-10-25
1926	1926-02-26	1926-11-20
1927	1927-03-23	1927-12-02
1928	1928-01-12	1928-11-24
1929	1929-04-15	1929-12-29
1930	1930-02-16	1930-11-12
1931	1931-01-27	1931-11-05
1932	1932-02-25	1932-11-26
1933	1933-04-11	1933-11-25
1934	1934-03-30	1934-11-06
1935	1935-04-18	1935-10-27
1936	1936-03-02	1936-11-18
1937	1937-04-20	1937-12-03
1938	1938-04-07	1938-12-08
1939	1939-04-06	1939-12-01
1940	1940-03-06	1940-12-03
1941	1941-05-06	1941-11-08
1942	1942-05-18	1942-12-15
1944	1944-03-09	1944-10-03
1945	1945-04-07	1945-11-04
1946	1946-04-11	1946-10-25
1947	1947-03-13	1947-12-25
1948	1948-04-14	1948-11-07
1949	1949-04-10	1949-11-18
1950	1950-03-29	1950-12-10
1951	1951-01-24	1951-11-06
1952	1952-03-27	1952-11-05
1953	1953-01-23	1953-12-15
1954	1954-02-03	1954-11-22
1955	1955-05-18	1955-11-08
1956	1956-05-14	1956-12-28
1957	1957-06-02	1957-12-09
1958	1958-04-11	1958-12-11
1959	1959-03-11	1959-12-06
1960	1960-03-18	1960-10-22
1961	1961-01-16	1961-11-07
1962	1962-04-06	1962-10-31
1963	1963-02-03	1963-11-01
1964	1964-03-17	1964-11-06
1965	1965-01-17	1965-10-29
1966	1966-03-31	1966-11-02
1967	1967-02-28	1967-11-11
1968	1968-03-04	1968-11-08
1969	1969-01-03	1969-11-02
1970	1970-04-05	1970-10-28
1971	1971-02-12	1971-11-03
1972	1972-05-27	1972-10-06
1973	1973-04-23	1973-11-01
1974	1974-05-26	1974-11-25
1975	1975-07-07	1975-11-25
1976	1976-01-16	1976-11-18
1977	1977-02-13	1977-11-30
1978	1978-03-17	1978-11-07
1979	1979-03-05	1979-12-06
1981	1981-01-10	1981-11-02
1983	1983-01-09	1983-10-27
1984	1984-01-29	1984-10-13
1985	1985-04-01	1985-11-02
1986	1986-02-24	1986-10-26
1987	1987-02-07	1987-11-10
1988	1988-02-12	1988-10-16
1989	1989-04-04	1989-11-19
1990	1990-03-20	1990-12-06
1991	1991-04-04	1991-11-13
1992	1992-02-24	1992-10-23
1993	1993-04-20	1993-11-03
1994	1994-03-13	1994-10-11
1996	1996-01-11	1996-11-12
1997	1997-03-10	1997-12-31
1998	1998-03-10	1998-12-17
1999	1999-04-15	1999-11-01
2000	2000-04-26	2000-09-18
2002	2002-05-12	2002-11-21

Every Fixed Threshold

Fixed thresholds at Tustin Irvine Rch
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	83	137	1997	45
35 C (95 F): Days	83	57	1997	8
40 C (104 F): Days	38	14	1997	1
90 F (32.2 C): Days	83	92	1997	17
100 F (37.8 C): Days	65	28	1997	1
110 F (43.3 C): Days	5	1	1939	1
0 C (32 F): Frost days (min	71	36	1936	1
20 C (68 F): Tropical nights (min	37	18	1997	1
25 C (77 F): Days with min	1	1	1923	1
10 mm (0.39 in): Days with 10 mm or more rain	82	28	1978	6
25 mm (0.98 in): Days with 25 mm or more rain	74	11	1978	2
50 mm (1.97 in): Days with 50 mm or more rain	28	2	1927	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1937	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

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Data for Tustin Irvine Rch 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).

Tustin Irvine Rch Threshold Days by Year (USC00049087)

Key Facts for Tustin Irvine Rch Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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