Colorado Threshold Days by Year (ASN00010534)

4 fixed thresholds counted per year at Colorado (ASN00010534): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Colorado Thresholds

Colorado: days with 10 mm (0.39 in) or more of precipitation in 113 years, most in 1917 with 21.
Colorado: days with 25 mm (0.98 in) or more of precipitation in 87 years, most in 1915 with 6.
Colorado: days with 50 mm (1.97 in) or more of precipitation in 18 years, most in 1955 with 2.
Colorado: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1990 with 1.
4 fixed thresholds have at least one qualifying day at Colorado.

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

113 years with a qualifying day

Days per year at Colorado with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1917.

Days with 10 mm (0.39 in) or more of precipitation per year at Colorado
Year	Days	Decade average
1914	6	14.5
1915	16	14.5
1916	17	14.5
1917	21	14.5
1918	14	14.5
1919	13	14.5
1920	12	11.6
1921	16	11.6
1922	9	11.6
1923	14	11.6
1924	9	11.6
1925	8	11.6
1926	18	11.6
1927	10	11.6
1928	8	11.6
1929	12	11.6
1930	13	11.1
1931	10	11.1
1932	16	11.1
1933	10	11.1
1934	7	11.1
1935	11	11.1
1936	9	11.1
1937	9	11.1
1938	6	11.1
1939	20	11.1
1940	6	10.2
1941	8	10.2
1942	11	10.2
1943	12	10.2
1944	5	10.2
1945	13	10.2
1946	20	10.2
1947	9	10.2
1948	8	10.2
1949	10	10.2
1950	11	11.1
1951	13	11.1
1952	11	11.1
1953	15	11.1
1954	7	11.1
1955	10	11.1
1956	11	11.1
1957	8	11.1
1958	16	11.1
1959	9	11.1
1960	14	11.7
1961	11	11.7
1962	9	11.7
1963	15	11.7
1964	12	11.7
1965	18	11.7
1966	7	11.7
1967	8	11.7
1968	14	11.7
1969	9	11.7
1970	9	10.3
1971	9	10.3
1972	3	10.3
1973	15	10.3
1974	17	10.3
1975	7	10.3
1976	13	10.3
1977	10	10.3
1978	12	10.3
1979	8	10.3
1980	6	10.1
1981	9	10.1
1982	14	10.1
1983	19	10.1
1984	12	10.1
1985	6	10.1
1986	7	10.1
1987	9	10.1
1988	10	10.1
1989	9	10.1
1990	7	9.8
1991	11	9.8
1992	10	9.8
1993	13	9.8
1994	8	9.8
1995	11	9.8
1996	9	9.8
1997	9	9.8
1998	7	9.8
1999	13	9.8
2000	4	7.1
2001	5	7.1
2002	4	7.1
2003	8	7.1
2004	8	7.1
2005	10	7.1
2006	10	7.1
2007	4	7.1
2008	11	7.1
2009	7	7.1
2010	5	9.1
2011	10	9.1
2012	9	9.1
2013	9	9.1
2014	11	9.1
2015	8	9.1
2016	11	9.1
2017	13	9.1
2018	9	9.1
2019	6	9.1
2020	7	9.9
2021	14	9.9
2022	11	9.9
2023	11	9.9
2024	10	9.9
2025	12	9.9
2026	4	9.9

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

First to last qualifying date each year at Colorado
Year	First date	Last date
1914	1914-01-17	1914-11-11
1915	1915-02-01	1915-10-10
1916	1916-01-29	1916-11-23
1917	1917-04-08	1917-12-21
1918	1918-02-15	1918-10-17
1919	1919-01-07	1919-11-04
1920	1920-03-12	1920-08-15
1921	1921-01-17	1921-12-13
1922	1922-02-24	1922-12-16
1923	1923-01-19	1923-09-17
1924	1924-05-12	1924-10-17
1925	1925-01-24	1925-09-25
1926	1926-03-10	1926-11-19
1927	1927-03-12	1927-10-07
1928	1928-01-24	1928-10-21
1929	1929-03-17	1929-11-15
1930	1930-04-15	1930-09-30
1931	1931-05-04	1931-12-28
1932	1932-04-08	1932-10-23
1933	1933-03-07	1933-10-16
1934	1934-01-16	1934-10-13
1935	1935-01-06	1935-12-31
1936	1936-03-05	1936-08-23
1937	1937-03-05	1937-11-13
1938	1938-03-14	1938-11-02
1939	1939-02-13	1939-11-01
1940	1940-01-23	1940-12-03
1941	1941-06-11	1941-10-03
1942	1942-03-14	1942-11-30
1943	1943-01-31	1943-09-19
1944	1944-05-18	1944-08-11
1945	1945-03-26	1945-08-23
1946	1946-04-20	1946-11-12
1947	1947-04-16	1947-11-19
1948	1948-06-05	1948-09-28
1949	1949-04-29	1949-09-01
1950	1950-01-26	1950-09-13
1951	1951-02-13	1951-12-03
1952	1952-03-29	1952-12-18
1953	1953-03-25	1953-10-11
1954	1954-05-23	1954-09-10
1955	1955-02-15	1955-08-31
1956	1956-04-12	1956-11-28
1957	1957-04-22	1957-06-26
1958	1958-05-23	1958-12-21
1959	1959-02-07	1959-08-19
1960	1960-01-03	1960-09-23
1961	1961-01-26	1961-08-31
1962	1962-05-13	1962-12-22
1963	1963-02-20	1963-11-20
1964	1964-04-02	1964-09-27
1965	1965-05-05	1965-12-27
1966	1966-04-05	1966-10-23
1967	1967-05-09	1967-07-27
1968	1968-01-27	1968-09-10
1969	1969-03-20	1969-09-27
1970	1970-02-17	1970-10-04
1971	1971-01-31	1971-11-11
1972	1972-05-31	1972-07-02
1973	1973-04-10	1973-11-15
1974	1974-03-07	1974-11-19
1975	1975-04-01	1975-08-17
1976	1976-01-07	1976-11-11
1977	1977-05-16	1977-12-23
1978	1978-02-24	1978-12-15
1979	1979-01-12	1979-08-19
1980	1980-02-25	1980-12-31
1981	1981-02-18	1981-11-06
1982	1982-01-18	1982-11-13
1983	1983-03-31	1983-12-31
1984	1984-03-02	1984-09-14
1985	1985-02-01	1985-09-21
1986	1986-02-22	1986-11-09
1987	1987-04-21	1987-12-24
1988	1988-03-24	1988-12-03
1989	1989-04-24	1989-08-30
1990	1990-01-29	1990-07-21
1991	1991-02-25	1991-11-05
1992	1992-02-09	1992-11-15
1993	1993-02-06	1993-11-16
1994	1994-05-23	1994-09-11
1995	1995-01-13	1995-10-18
1996	1996-05-31	1996-11-05
1997	1997-02-20	1997-10-09
1998	1998-03-11	1998-08-29
1999	1999-01-23	1999-12-20
2000	2000-01-15	2000-07-11
2001	2001-06-01	2001-12-01
2002	2002-05-01	2002-12-07
2003	2003-03-23	2003-08-11
2004	2004-02-18	2004-10-21
2005	2005-03-28	2005-08-18
2006	2006-01-13	2006-11-29
2007	2007-04-16	2007-10-09
2008	2008-02-08	2008-09-26
2009	2009-03-02	2009-12-20
2010	2010-03-23	2010-12-21
2011	2011-01-06	2011-12-13
2012	2012-02-03	2012-11-29
2013	2013-01-07	2013-10-20
2014	2014-04-27	2014-10-20
2015	2015-03-27	2015-12-06
2016	2016-01-19	2016-08-27
2017	2017-01-31	2017-10-22
2018	2018-01-16	2018-08-09
2019	2019-06-07	2019-08-17
2020	2020-02-28	2020-08-10
2021	2021-02-07	2021-10-27
2022	2022-03-27	2022-10-24
2023	2023-01-31	2023-09-14
2024	2024-03-03	2024-11-21
2025	2025-03-14	2025-11-06
2026	2026-03-28	2026-08-27

Every Fixed Threshold

Fixed thresholds at Colorado
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	113	21	1917	4
25 mm (0.98 in): Days with 25 mm or more rain	87	6	1915	2
50 mm (1.97 in): Days with 50 mm or more rain	18	2	1955	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1990	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.

Download the Data

Data for Colorado 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).

Colorado Threshold Days by Year (ASN00010534)

Key Facts for Colorado Thresholds

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

Every Fixed Threshold

Download the Data

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