Redlands Threshold Days by Year

4 fixed thresholds counted per year at Redlands (ASN00010634): 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 97 years, most in 1955 with 27.
Redlands: days with 25 mm (0.98 in) or more of precipitation in 90 years, most in 1917 with 10.
Redlands: days with 50 mm (1.97 in) or more of precipitation in 25 years, most in 1934 with 3.
Redlands: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1955 with 1.
4 fixed thresholds have at least one qualifying day at Redlands.

Days with 10 mm (0.39 in) or more of precipitation

97 years with a qualifying day

Days per year at Redlands with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 27 in 1955.

Days with 10 mm (0.39 in) or more of precipitation per year at Redlands
Year	Days	Decade average
1912	16	15.6
1913	17	15.6
1914	3	15.6
1915	17	15.6
1916	16	15.6
1917	25	15.6
1918	20	15.6
1919	11	15.6
1920	16	16.6
1921	18	16.6
1922	15	16.6
1923	24	16.6
1924	15	16.6
1925	10	16.6
1926	21	16.6
1927	14	16.6
1928	16	16.6
1931	17	15
1933	17	15
1934	18	15
1935	9	15
1936	10	15
1937	12	15
1938	11	15
1939	26	15
1940	10	15
1941	11	15
1942	18	15
1943	17	15
1944	8	15
1945	23	15
1946	23	15
1947	13	15
1948	12	15
1949	15	15
1950	12	16.6
1951	17	16.6
1952	16	16.6
1953	21	16.6
1954	12	16.6
1955	27	16.6
1956	17	16.6
1957	16	16.6
1958	18	16.6
1959	10	16.6
1960	25	17.8
1961	14	17.8
1962	15	17.8
1963	27	17.8
1964	20	17.8
1965	21	17.8
1966	14	17.8
1967	14	17.8
1968	17	17.8
1969	11	17.8
1970	13	14.1
1971	18	14.1
1972	8	14.1
1973	12	14.1
1974	22	14.1
1975	13	14.1
1976	19	14.1
1977	6	14.1
1978	20	14.1
1979	10	14.1
1980	14	14.7
1981	15	14.7
1982	18	14.7
1983	19	14.7
1984	13	14.7
1985	14	14.7
1986	18	14.7
1987	11	14.7
1988	14	14.7
1989	11	14.7
1990	14	14.5
1991	15	14.5
1992	20	14.5
1993	14	14.5
1994	10	14.5
1995	13	14.5
1996	17	14.5
1997	11	14.5
1998	11	14.5
1999	20	14.5
2000	11	12
2001	10	12
2002	7	12
2003	14	12
2004	9	12
2005	18	12
2006	10	12
2007	16	12
2008	13	12
2017	14	14
2024	15	10
2026	5	10

For each year, a bar from the first to the last day at Redlands meeting 10 mm (0.39 in).

First to last qualifying date each year at Redlands
Year	First date	Last date
1912	1912-05-06	1912-09-28
1913	1913-04-11	1913-12-20
1914	1914-02-18	1914-07-27
1915	1915-01-15	1915-10-10
1916	1916-01-29	1916-11-23
1917	1917-04-08	1917-12-09
1918	1918-02-15	1918-11-26
1919	1919-04-16	1919-08-28
1920	1920-04-09	1920-09-11
1921	1921-02-14	1921-12-14
1922	1922-02-24	1922-09-17
1923	1923-01-20	1923-12-17
1924	1924-05-12	1924-10-18
1925	1925-01-24	1925-09-25
1926	1926-03-11	1926-11-19
1927	1927-03-13	1927-10-07
1928	1928-05-30	1928-10-21
1931	1931-05-04	1931-09-08
1933	1933-01-16	1933-10-03
1934	1934-03-09	1934-11-04
1935	1935-05-15	1935-08-11
1936	1936-04-15	1936-11-01
1937	1937-04-19	1937-11-24
1938	1938-03-16	1938-11-02
1939	1939-01-21	1939-11-10
1940	1940-01-23	1940-12-03
1941	1941-04-27	1941-10-24
1942	1942-03-17	1942-12-21
1943	1943-01-31	1943-10-10
1944	1944-05-15	1944-12-07
1945	1945-03-26	1945-08-22
1946	1946-04-20	1946-11-12
1947	1947-02-27	1947-10-25
1948	1948-06-05	1948-11-15
1949	1949-04-29	1949-10-14
1950	1950-05-05	1950-09-13
1951	1951-02-12	1951-12-01
1952	1952-03-29	1952-12-18
1953	1953-04-25	1953-10-18
1954	1954-05-23	1954-09-29
1955	1955-02-06	1955-10-20
1956	1956-05-06	1956-11-29
1957	1957-01-21	1957-09-05
1958	1958-02-14	1958-12-21
1959	1959-03-01	1959-10-07
1960	1960-01-01	1960-09-22
1961	1961-01-28	1961-08-30
1962	1962-05-13	1962-11-09
1963	1963-01-30	1963-10-31
1964	1964-04-02	1964-12-20
1965	1965-05-05	1965-11-02
1966	1966-06-03	1966-10-23
1967	1967-04-21	1967-09-02
1968	1968-03-07	1968-09-10
1969	1969-03-19	1969-08-01
1970	1970-02-16	1970-10-04
1971	1971-01-01	1971-11-26
1972	1972-04-20	1972-08-17
1973	1973-06-06	1973-10-15
1974	1974-04-03	1974-11-19
1975	1975-05-05	1975-09-20
1976	1976-01-07	1976-11-11
1977	1977-05-16	1977-10-30
1978	1978-02-18	1978-12-16
1979	1979-03-14	1979-10-02
1980	1980-02-11	1980-12-31
1981	1981-02-18	1981-09-08
1982	1982-01-21	1982-12-20
1983	1983-05-03	1983-12-31
1984	1984-03-04	1984-11-08
1985	1985-03-09	1985-09-18
1986	1986-02-21	1986-11-09
1987	1987-04-08	1987-12-24
1988	1988-03-24	1988-09-29
1989	1989-01-12	1989-08-30
1990	1990-01-29	1990-08-02
1991	1991-02-26	1991-11-05
1992	1992-02-09	1992-11-19
1993	1993-02-07	1993-09-08
1994	1994-05-23	1994-09-11
1995	1995-05-10	1995-10-18
1996	1996-05-31	1996-11-07
1997	1997-02-21	1997-10-09
1998	1998-03-11	1998-09-22
1999	1999-01-23	1999-11-04
2000	2000-01-15	2000-09-06
2001	2001-05-07	2001-11-19
2002	2002-04-17	2002-08-05
2003	2003-04-12	2003-09-22
2004	2004-02-18	2004-10-21
2005	2005-03-28	2005-10-06
2006	2006-01-08	2006-12-21
2007	2007-03-18	2007-12-21
2008	2008-04-01	2008-11-23
2017	2017-01-31	2017-10-22
2024	2024-01-17	2024-10-03
2026	2026-03-28	2026-08-27

Every Fixed Threshold

Fixed thresholds at Redlands
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	97	27	1955	5
25 mm (0.98 in): Days with 25 mm or more rain	90	10	1917	1
50 mm (1.97 in): Days with 50 mm or more rain	25	3	1934	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1955	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Redlands Threshold Days by Year

Key Facts for Redlands Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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