Pomona/Fairplex Threshold Days by Year (USC00047050)

15 fixed thresholds counted per year at Pomona/Fairplex (USC00047050): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Pomona/Fairplex Thresholds

Pomona/Fairplex: nights with a minimum temperature at or below 0 C (32 F) in 85 years, most in 1919 with 74.
Pomona/Fairplex: days with 10 mm (0.39 in) or more of precipitation in 84 years, most in 1941 with 29.
Pomona/Fairplex: days with a maximum temperature at or above 30 C (86 F) in 83 years, most in 1949 with 137.
Pomona/Fairplex: days with a maximum temperature at or above 35 C (95 F) in 83 years, most in 2003 with 59.
15 fixed thresholds have at least one qualifying day at Pomona/Fairplex.

Days at or above 30 C (86 F)

83 years with a qualifying day

Days per year at Pomona/Fairplex with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 137 in 1949.

Days at or above 30 C (86 F) per year at Pomona/Fairplex
Year	Days	Decade average
1894	110	112.2
1896	116	112.2
1897	97	112.2
1898	125	112.2
1899	113	112.2
1900	93	103.7
1901	112	103.7
1902	106	103.7
1913	98	109.6
1914	105	109.6
1915	103	109.6
1916	101	109.6
1917	132	109.6
1918	115	109.6
1919	113	109.6
1920	90	103.6
1921	109	103.6
1922	117	103.6
1923	100	103.6
1924	116	103.6
1925	100	103.6
1926	105	103.6
1927	104	103.6
1928	96	103.6
1929	99	103.6
1930	92	104.3
1931	110	104.3
1932	83	104.3
1933	86	104.3
1934	98	104.3
1935	88	104.3
1936	116	104.3
1937	126	104.3
1938	118	104.3
1939	126	104.3
1940	123	108.9
1941	97	108.9
1942	107	108.9
1943	120	108.9
1944	73	108.9
1945	95	108.9
1946	115	108.9
1947	102	108.9
1948	120	108.9
1949	137	108.9
1950	114	109.8
1951	109	109.8
1952	111	109.8
1953	102	109.8
1954	97	109.8
1955	100	109.8
1956	114	109.8
1957	102	109.8
1958	137	109.8
1959	112	109.8
1960	124	114
1961	102	114
1962	115	114
1963	97	114
1964	116	114
1965	114	114
1966	127	114
1967	125	114
1968	119	114
1969	101	114
1970	96	90.6
1971	102	90.6
1972	76	90.6
1973	74	90.6
1974	91	90.6
1975	73	90.6
1976	87	90.6
1977	96	90.6
1978	111	90.6
1979	100	90.6
1980	106	106.3
1981	122	106.3
1989	91	106.3
2003	129	110
2004	100	110
2005	105	110
2007	106	110
2011	100	100

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

First to last qualifying date each year at Pomona/Fairplex
Year	First date	Last date
1894	1894-05-01	1894-11-13
1896	1896-03-24	1896-10-31
1897	1897-04-08	1897-11-19
1898	1898-04-06	1898-11-04
1899	1899-03-06	1899-10-09
1900	1900-02-22	1900-11-13
1901	1901-02-26	1901-10-22
1902	1902-01-03	1902-10-16
1913	1913-03-06	1913-11-09
1914	1914-03-06	1914-11-08
1915	1915-03-16	1915-10-28
1916	1916-02-15	1916-11-01
1917	1917-03-26	1917-11-21
1918	1918-03-30	1918-11-01
1919	1919-04-15	1919-11-16
1920	1920-04-26	1920-09-30
1921	1921-02-24	1921-11-10
1922	1922-04-19	1922-10-25
1923	1923-01-08	1923-10-20
1924	1924-02-13	1924-11-22
1925	1925-03-04	1925-10-25
1926	1926-03-13	1926-11-07
1927	1927-03-23	1927-10-22
1928	1928-04-26	1928-10-22
1929	1929-05-01	1929-11-04
1930	1930-03-25	1930-11-07
1931	1931-03-20	1931-11-04
1932	1932-03-26	1932-11-18
1933	1933-04-14	1933-11-25
1934	1934-03-10	1934-10-26
1935	1935-04-25	1935-10-27
1936	1936-03-19	1936-11-18
1937	1937-04-14	1937-11-27
1938	1938-04-08	1938-12-08
1939	1939-04-06	1939-12-04
1940	1940-03-06	1940-12-07
1941	1941-05-06	1941-11-08
1942	1942-03-29	1942-11-13
1943	1943-02-12	1943-10-25
1944	1944-01-19	1944-10-27
1945	1945-03-31	1945-11-04
1946	1946-03-01	1946-10-25
1947	1947-03-14	1947-10-31
1948	1948-04-14	1948-10-24
1949	1949-04-04	1949-11-24
1950	1950-04-02	1950-11-05
1951	1951-02-09	1951-11-06
1952	1952-04-03	1952-11-05
1953	1953-02-06	1953-11-29
1954	1954-01-31	1954-11-22
1955	1955-03-25	1955-11-10
1956	1956-04-20	1956-11-25
1957	1957-02-12	1957-10-25
1958	1958-04-14	1958-12-11
1959	1959-01-17	1959-12-01
1960	1960-03-19	1960-10-22
1961	1961-04-02	1961-11-05
1962	1962-01-07	1962-11-08
1963	1963-02-03	1963-11-11
1964	1964-01-01	1964-11-30
1965	1965-04-19	1965-12-05
1966	1966-03-30	1966-11-02
1967	1967-02-28	1967-11-13
1968	1968-02-24	1968-11-10
1969	1969-03-26	1969-11-03
1970	1970-05-03	1970-11-02
1971	1971-01-19	1971-11-05
1972	1972-03-05	1972-10-07
1973	1973-05-03	1973-11-01
1974	1974-04-15	1974-11-14
1975	1975-01-15	1975-12-10
1976	1976-01-17	1976-11-18
1977	1977-02-13	1977-11-27
1978	1978-03-17	1978-11-08
1979	1979-03-07	1979-12-17
1980	1980-04-08	1980-12-29
1981	1981-02-18	1981-11-09
1989	1989-02-22	1989-11-18
2003	2003-01-29	2003-10-27
2004	2004-03-07	2004-10-14
2005	2005-04-05	2005-12-24
2007	2007-02-18	2007-11-15
2011	2011-03-30	2011-10-30

Every Fixed Threshold

Fixed thresholds at Pomona/Fairplex
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	83	137	1949	100
35 C (95 F): Days	83	59	2003	27
40 C (104 F): Days	66	11	1898	2
45 C (113 F): Days	2	2	1917	1
90 F (32.2 C): Days	83	101	1917	68
100 F (37.8 C): Days	83	25	1898	5
110 F (43.3 C): Days	11	4	1917	3
0 C (32 F): Frost days (min	85	74	1919	1
20 C (68 F): Tropical nights (min	46	12	1967	8
25 C (77 F): Days with min	3	1	1971	1
10 mm (0.39 in): Days with 10 mm or more rain	84	29	1941	1
25 mm (0.98 in): Days with 25 mm or more rain	82	16	1978	1
50 mm (1.97 in): Days with 50 mm or more rain	57	7	1980	2
100 mm (3.94 in): Days with 100 mm or more rain	10	1	1914	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1934	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

Data for Pomona/Fairplex 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).

Pomona/Fairplex Threshold Days by Year (USC00047050)

Key Facts for Pomona/Fairplex Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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