Redlands Threshold Days by Year (USC00047306)

14 fixed thresholds counted per year at Redlands (USC00047306): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Redlands Thresholds

Redlands: days with 10 mm (0.39 in) or more of precipitation in 113 years, most in 1978 with 29.
Redlands: days with a maximum temperature at or above 30 C (86 F) in 108 years, most in 2012 with 165.
Redlands: days with a maximum temperature at or above 35 C (95 F) in 108 years, most in 1960 with 92.
Redlands: days with a maximum temperature at or above 90 F (32.2 C) in 108 years, most in 2008 with 137.
14 fixed thresholds have at least one qualifying day at Redlands.

Days at or above 30 C (86 F)

108 years with a qualifying day

Days per year at Redlands with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 165 in 2012.

Days at or above 30 C (86 F) per year at Redlands
Year	Days	Decade average
1899	121	121
1900	117	116.7
1905	117	116.7
1906	134	116.7
1907	92	116.7
1908	125	116.7
1909	115	116.7
1910	142	114.9
1911	105	114.9
1912	91	114.9
1913	95	114.9
1914	118	114.9
1915	116	114.9
1916	114	114.9
1917	138	114.9
1918	112	114.9
1919	118	114.9
1920	98	120.5
1921	121	120.5
1922	126	120.5
1923	102	120.5
1924	122	120.5
1925	115	120.5
1926	137	120.5
1927	135	120.5
1928	123	120.5
1929	126	120.5
1930	114	113.8
1931	125	113.8
1932	92	113.8
1933	114	113.8
1934	123	113.8
1935	104	113.8
1936	127	113.8
1937	122	113.8
1938	105	113.8
1939	112	113.8
1940	107	102.6
1941	81	102.6
1942	101	102.6
1943	118	102.6
1944	76	102.6
1945	98	102.6
1946	115	102.6
1947	104	102.6
1948	104	102.6
1949	122	102.6
1950	104	114.7
1951	100	114.7
1952	118	114.7
1953	98	114.7
1954	103	114.7
1955	104	114.7
1956	119	114.7
1957	114	114.7
1958	152	114.7
1959	135	114.7
1960	155	129.5
1961	129	129.5
1962	143	129.5
1963	117	129.5
1964	126	129.5
1965	123	129.5
1966	136	129.5
1967	132	129.5
1968	124	129.5
1969	110	129.5
1970	130	118.3
1971	129	118.3
1972	117	118.3
1973	110	118.3
1974	123	118.3
1975	91	118.3
1976	103	118.3
1978	143	118.3
1979	119	118.3
1980	131	133.6
1981	133	133.6
1983	109	133.6
1984	138	133.6
1985	133	133.6
1986	132	133.6
1987	146	133.6
1988	142	133.6
1989	138	133.6
1990	131	121.7
1991	121	121.7
1992	123	121.7
1993	112	121.7
1994	121	121.7
1995	118	121.7
1996	131	121.7
1998	102	121.7
1999	136	121.7
2000	127	138.7
2001	143	138.7
2002	126	138.7
2003	143	138.7
2004	146	138.7
2005	100	138.7
2007	155	138.7
2008	164	138.7
2009	144	138.7
2010	120	136.8
2011	128	136.8
2012	165	136.8
2013	130	136.8
2014	141	136.8

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

First to last qualifying date each year at Redlands
Year	First date	Last date
1899	1899-02-19	1899-10-09
1900	1900-02-22	1900-11-14
1905	1905-04-04	1905-10-28
1906	1906-04-18	1906-11-15
1907	1907-04-08	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	1911-05-20	1911-11-27
1912	1912-05-13	1912-11-08
1913	1913-04-05	1913-11-08
1914	1914-03-08	1914-11-05
1915	1915-03-15	1915-10-29
1916	1916-03-08	1916-11-01
1917	1917-04-05	1917-12-31
1918	1918-03-30	1918-11-10
1919	1919-04-01	1919-11-16
1920	1920-01-17	1920-10-09
1921	1921-02-24	1921-11-05
1922	1922-04-20	1922-10-25
1923	1923-01-08	1923-10-20
1924	1924-04-18	1924-11-22
1925	1925-03-03	1925-10-21
1926	1926-03-14	1926-11-16
1927	1927-03-23	1927-12-03
1928	1928-01-12	1928-10-23
1929	1929-03-04	1929-11-18
1930	1930-02-07	1930-11-07
1931	1931-03-20	1931-11-06
1932	1932-04-09	1932-11-18
1933	1933-05-24	1933-11-26
1934	1934-03-10	1934-11-06
1935	1935-05-05	1935-10-27
1936	1936-03-19	1936-11-18
1937	1937-04-14	1937-10-25
1938	1938-04-17	1938-12-06
1939	1939-03-16	1939-10-31
1940	1940-04-11	1940-10-20
1941	1941-05-06	1941-11-06
1942	1942-04-19	1942-11-13
1943	1943-04-01	1943-10-16
1944	1944-05-03	1944-10-27
1945	1945-04-28	1945-11-04
1946	1946-04-11	1946-10-25
1947	1947-04-11	1947-10-25
1948	1948-04-15	1948-10-25
1949	1949-04-10	1949-11-16
1950	1950-04-17	1950-11-03
1951	1951-04-11	1951-10-19
1952	1952-04-04	1952-10-28
1953	1953-05-05	1953-10-31
1954	1954-02-24	1954-10-21
1955	1955-03-25	1955-11-10
1956	1956-03-24	1956-11-11
1957	1957-02-12	1957-10-25
1958	1958-04-15	1958-12-11
1959	1959-01-17	1959-11-24
1960	1960-03-18	1960-11-01
1961	1961-04-01	1961-11-04
1962	1962-01-07	1962-11-08
1963	1963-02-03	1963-11-11
1964	1964-03-29	1964-11-06
1965	1965-04-19	1965-11-04
1966	1966-03-30	1966-11-02
1967	1967-03-01	1967-11-13
1968	1968-02-24	1968-11-10
1969	1969-03-27	1969-11-03
1970	1970-04-05	1970-11-02
1971	1971-01-17	1971-11-04
1972	1972-02-27	1972-10-07
1973	1973-04-27	1973-11-12
1974	1974-04-07	1974-11-13
1975	1975-01-14	1975-11-04
1976	1976-01-16	1976-10-17
1978	1978-03-17	1978-11-08
1979	1979-04-13	1979-12-06
1980	1980-04-08	1980-11-28
1981	1981-04-05	1981-11-03
1983	1983-04-17	1983-11-06
1984	1984-03-19	1984-11-04
1985	1985-02-15	1985-11-07
1986	1986-01-27	1986-11-12
1987	1987-01-26	1987-11-11
1988	1988-02-09	1988-11-05
1989	1989-03-06	1989-12-05
1990	1990-01-09	1990-11-13
1991	1991-02-14	1991-11-12
1992	1992-02-25	1992-10-12
1993	1993-04-20	1993-11-03
1994	1994-03-02	1994-10-31
1995	1995-02-02	1995-11-24
1996	1996-02-07	1996-10-12
1998	1998-04-20	1998-12-13
1999	1999-04-14	1999-11-14
2000	2000-04-04	2000-10-20
2001	2001-03-19	2001-11-08
2002	2002-02-12	2002-11-21
2003	2003-01-25	2003-10-28
2004	2004-03-07	2004-10-15
2005	2005-03-10	2005-12-24
2007	2007-02-04	2007-12-04
2008	2008-03-22	2008-11-19
2009	2009-01-14	2009-11-10
2010	2010-05-04	2010-11-05
2011	2011-03-30	2011-12-31
2012	2012-01-02	2012-11-24
2013	2013-03-12	2013-11-14
2014	2014-03-15	2014-11-27

Every Fixed Threshold

Fixed thresholds at Redlands
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	108	165	2012	141
35 C (95 F): Days	108	92	1960	47
40 C (104 F): Days	99	20	1960	4
45 C (113 F): Days	6	2	1917	1
90 F (32.2 C): Days	108	137	2008	93
100 F (37.8 C): Days	108	46	1960	7
110 F (43.3 C): Days	26	4	1960	1
0 C (32 F): Frost days (min	107	30	1937	10
20 C (68 F): Tropical nights (min	107	36	1984	26
25 C (77 F): Days with min	6	2	2007	1
10 mm (0.39 in): Days with 10 mm or more rain	113	29	1978	10
25 mm (0.98 in): Days with 25 mm or more rain	101	8	1998	1
50 mm (1.97 in): Days with 50 mm or more rain	32	4	1943	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	2010	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

Download the Data

Data for Redlands 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Redlands Threshold Days by Year (USC00047306)

Key Facts for Redlands Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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