Riverside Fire STN 3 Threshold Days by Year (USC00047470)

14 fixed thresholds counted per year at Riverside Fire STN 3 (USC00047470): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Riverside Fire STN 3 Thresholds

Riverside Fire STN 3: days with a maximum temperature at or above 30 C (86 F) in 105 years, most in 2014 with 176.
Riverside Fire STN 3: days with a maximum temperature at or above 35 C (95 F) in 105 years, most in 1917 with 97.
Riverside Fire STN 3: days with a maximum temperature at or above 90 F (32.2 C) in 105 years, most in 1917 with 146.
Riverside Fire STN 3: days with a maximum temperature at or above 100 F (37.8 C) in 105 years, most in 1996 with 45.
14 fixed thresholds have at least one qualifying day at Riverside Fire STN 3.

Days at or above 30 C (86 F)

105 years with a qualifying day

Days per year at Riverside Fire STN 3 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 176 in 2014.

Days at or above 30 C (86 F) per year at Riverside Fire STN 3
Year	Days	Decade average
1893	90	117
1894	133	117
1895	128	117
1902	88	107.5
1903	105	107.5
1904	127	107.5
1905	99	107.5
1906	123	107.5
1907	99	107.5
1908	121	107.5
1909	98	107.5
1910	145	139.6
1911	130	139.6
1912	115	139.6
1913	134	139.6
1914	143	139.6
1915	157	139.6
1916	150	139.6
1917	166	139.6
1918	128	139.6
1919	128	139.6
1920	111	132
1921	145	132
1922	144	132
1923	121	132
1924	141	132
1925	134	132
1926	162	132
1927	130	132
1928	118	132
1929	114	132
1930	131	133.1
1931	136	133.1
1932	126	133.1
1933	128	133.1
1934	130	133.1
1935	115	133.1
1936	143	133.1
1937	138	133.1
1938	133	133.1
1939	151	133.1
1940	148	126.8
1941	108	126.8
1942	122	126.8
1943	144	126.8
1944	98	126.8
1945	106	126.8
1946	142	126.8
1947	130	126.8
1948	129	126.8
1949	141	126.8
1950	124	120.2
1951	113	120.2
1952	120	120.2
1953	97	120.2
1954	127	120.2
1955	115	120.2
1956	120	120.2
1957	113	120.2
1958	147	120.2
1959	126	120.2
1960	146	122.2
1961	116	122.2
1962	129	122.2
1963	104	122.2
1964	117	122.2
1965	118	122.2
1966	135	122.2
1967	132	122.2
1968	125	122.2
1969	100	122.2
1970	126	120.5
1971	128	120.5
1972	109	120.5
1973	106	120.5
1974	123	120.5
1975	115	120.5
1976	118	120.5
1977	123	120.5
1978	138	120.5
1979	119	120.5
1980	130	131.9
1981	134	131.9
1982	90	131.9
1983	110	131.9
1984	144	131.9
1985	136	131.9
1986	146	131.9
1987	142	131.9
1988	148	131.9
1989	139	131.9
1990	144	134
1991	140	134
1993	119	134
1994	130	134
1995	137	134
1996	142	134
1997	151	134
1998	106	134
1999	137	134
2000	129	130.5
2003	132	130.5
2013	143	154.7
2014	176	154.7
2015	145	154.7

For each year, a bar from the first to the last day at Riverside Fire STN 3 meeting 30 C (86 F).

First to last qualifying date each year at Riverside Fire STN 3
Year	First date	Last date
1893	1893-03-27	1893-10-27
1894	1894-03-25	1894-11-25
1895	1895-03-23	1895-11-19
1902	1902-03-17	1902-10-28
1903	1903-05-28	1903-11-27
1904	1904-03-05	1904-11-27
1905	1905-01-29	1905-10-27
1906	1906-03-08	1906-11-14
1907	1907-02-09	1907-10-14
1908	1908-02-26	1908-11-06
1909	1909-04-01	1909-11-03
1910	1910-03-01	1910-10-28
1911	1911-03-29	1911-12-01
1912	1912-01-14	1912-11-27
1913	1913-01-03	1913-11-10
1914	1914-01-06	1914-11-26
1915	1915-03-14	1915-12-01
1916	1916-02-12	1916-11-30
1917	1917-03-24	1917-12-31
1918	1918-01-01	1918-11-11
1919	1919-04-01	1919-12-24
1920	1920-01-17	1920-10-27
1921	1921-02-11	1921-12-10
1922	1922-04-19	1922-11-26
1923	1923-01-07	1923-11-23
1924	1924-02-13	1924-11-29
1925	1925-02-26	1925-10-27
1926	1926-02-08	1926-11-30
1927	1927-03-23	1927-11-17
1928	1928-03-18	1928-10-29
1929	1929-05-01	1929-11-18
1930	1930-02-15	1930-11-09
1931	1931-03-04	1931-11-07
1932	1932-02-28	1932-11-20
1933	1933-04-15	1933-11-27
1934	1934-03-10	1934-11-07
1935	1935-02-19	1935-10-29
1936	1936-03-03	1936-11-19
1937	1937-04-15	1937-11-28
1938	1938-04-09	1938-12-09
1939	1939-03-16	1939-12-20
1940	1940-04-11	1940-12-09
1941	1941-03-10	1941-11-15
1942	1942-03-04	1942-12-15
1943	1943-02-14	1943-11-15
1944	1944-05-03	1944-10-28
1945	1945-04-07	1945-12-31
1946	1946-01-23	1946-12-02
1947	1947-01-25	1947-12-27
1948	1948-01-07	1948-11-06
1949	1949-04-09	1949-12-01
1950	1950-03-04	1950-12-24
1951	1951-01-25	1951-11-05
1952	1952-03-25	1952-11-05
1953	1953-03-23	1953-10-31
1954	1954-02-23	1954-11-26
1955	1955-03-25	1955-11-10
1956	1956-03-17	1956-11-11
1957	1957-02-13	1957-10-25
1958	1958-04-14	1958-12-17
1959	1959-01-17	1959-12-01
1960	1960-03-18	1960-10-30
1961	1961-01-16	1961-11-06
1962	1962-01-07	1962-11-08
1963	1963-02-03	1963-11-11
1964	1964-03-29	1964-11-05
1965	1965-04-19	1965-11-04
1966	1966-03-30	1966-11-02
1967	1967-02-28	1967-11-13
1968	1968-02-23	1968-11-10
1969	1969-03-27	1969-11-03
1970	1970-04-05	1970-11-17
1971	1971-01-17	1971-11-04
1972	1972-02-27	1972-10-07
1973	1973-04-26	1973-10-31
1974	1974-04-07	1974-11-13
1975	1975-01-14	1975-11-04
1976	1976-01-17	1976-11-08
1977	1977-02-15	1977-11-26
1978	1978-03-17	1978-11-08
1979	1979-04-05	1979-12-04
1980	1980-04-08	1980-12-26
1981	1981-02-17	1981-11-03
1982	1982-04-19	1982-10-24
1983	1983-05-17	1983-11-04
1984	1984-03-20	1984-11-01
1985	1985-02-25	1985-11-06
1986	1986-01-18	1986-11-12
1987	1987-01-26	1987-11-11
1988	1988-02-09	1988-12-13
1989	1989-03-06	1989-11-19
1990	1990-01-09	1990-11-23
1991	1991-02-10	1991-11-26
1993	1993-03-07	1993-11-03
1994	1994-01-03	1994-11-01
1995	1995-02-01	1995-11-30
1996	1996-01-12	1996-11-12
1997	1997-03-09	1997-11-07
1998	1998-04-20	1998-10-23
1999	1999-04-14	1999-12-17
2000	2000-03-18	2000-10-17
2003	2003-01-25	2003-10-27
2013	2013-03-01	2013-12-17
2014	2014-01-02	2014-11-27
2015	2015-01-06	2015-11-20

Every Fixed Threshold

Fixed thresholds at Riverside Fire STN 3
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	105	176	2014	145
35 C (95 F): Days	105	97	1917	47
40 C (104 F): Days	103	20	1998	5
45 C (113 F): Days	8	3	1917	1
90 F (32.2 C): Days	105	146	1917	101
100 F (37.8 C): Days	105	45	1996	17
110 F (43.3 C): Days	34	4	1917	1
0 C (32 F): Frost days (min	98	63	1948	4
20 C (68 F): Tropical nights (min	72	47	2015	47
25 C (77 F): Days with min	8	2	2013	1
10 mm (0.39 in): Days with 10 mm or more rain	104	24	1978	10
25 mm (0.98 in): Days with 25 mm or more rain	84	7	1995	2
50 mm (1.97 in): Days with 50 mm or more rain	23	3	1969	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1938	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 Riverside Fire STN 3 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).

Riverside Fire STN 3 Threshold Days by Year (USC00047470)

Key Facts for Riverside Fire STN 3 Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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