Chacon Threshold Days by Year (USC00291653)

6 fixed thresholds counted per year at Chacon (USC00291653): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chacon Thresholds

Chacon: days with 10 mm (0.39 in) or more of precipitation in 62 years, most in 1921 with 27.
Chacon: days with 10 cm (3.9 in) or more of snowfall in 54 years, most in 1920 with 15.
Chacon: days with 25 mm (0.98 in) or more of precipitation in 53 years, most in 1912 with 7.
Chacon: days with 25 cm (9.8 in) or more of snowfall in 30 years, most in 1912 with 3.
6 fixed thresholds have at least one qualifying day at Chacon.

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

62 years with a qualifying day

Days per year at Chacon with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 27 in 1921.

Days with 10 mm (0.39 in) or more of precipitation per year at Chacon
Year	Days	Decade average
1910	10	19.6
1911	18	19.6
1912	16	19.6
1913	19	19.6
1914	24	19.6
1915	15	19.6
1916	23	19.6
1917	20	19.6
1918	19	19.6
1919	32	19.6
1920	20	18.4
1921	27	18.4
1922	13	18.4
1923	22	18.4
1924	10	18.4
1930	17	12.5
1931	16	12.5
1932	13	12.5
1933	7	12.5
1934	6	12.5
1936	13	12.5
1937	13	12.5
1938	15	12.5
1940	16	17.3
1941	22	17.3
1943	13	17.3
1944	12	17.3
1945	16	17.3
1949	25	17.3
1950	13	14.6
1953	11	14.6
1954	19	14.6
1955	10	14.6
1956	7	14.6
1957	27	14.6
1958	14	14.6
1959	16	14.6
1960	17	16.2
1961	21	16.2
1962	8	16.2
1963	13	16.2
1964	10	16.2
1965	24	16.2
1966	18	16.2
1967	13	16.2
1968	11	16.2
1969	27	16.2
1970	11	16.8
1971	20	16.8
1972	16	16.8
1973	21	16.8
1974	17	16.8
1975	21	16.8
1976	18	16.8
1977	12	16.8
1978	17	16.8
1979	15	16.8
1980	18	15.4
1981	18	15.4
1982	20	15.4
1983	8	15.4
1984	13	15.4

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

First to last qualifying date each year at Chacon
Year	First date	Last date
1910	1910-02-21	1910-11-05
1911	1911-02-17	1911-11-11
1912	1912-01-08	1912-10-05
1913	1913-01-05	1913-12-16
1914	1914-03-21	1914-10-23
1915	1915-02-20	1915-12-27
1916	1916-01-09	1916-12-28
1917	1917-02-14	1917-11-15
1918	1918-01-27	1918-12-31
1919	1919-02-01	1919-11-09
1920	1920-02-09	1920-12-12
1921	1921-04-13	1921-10-24
1922	1922-02-05	1922-11-22
1923	1923-01-26	1923-12-11
1924	1924-03-09	1924-08-13
1930	1930-03-27	1930-10-11
1931	1931-03-06	1931-10-20
1932	1932-04-27	1932-12-15
1933	1933-06-21	1933-12-01
1934	1934-01-05	1934-10-11
1936	1936-05-07	1936-10-20
1937	1937-04-04	1937-09-06
1938	1938-05-06	1938-11-06
1940	1940-02-02	1940-11-24
1941	1941-01-29	1941-10-24
1943	1943-05-08	1943-12-10
1944	1944-01-25	1944-11-06
1945	1945-01-20	1945-09-30
1949	1949-04-02	1949-12-11
1950	1950-01-03	1950-11-15
1953	1953-04-07	1953-12-04
1954	1954-01-13	1954-12-11
1955	1955-05-11	1955-12-03
1956	1956-01-17	1956-08-19
1957	1957-01-08	1957-11-16
1958	1958-03-04	1958-11-26
1959	1959-04-07	1959-12-26
1960	1960-01-01	1960-12-08
1961	1961-01-26	1961-12-16
1962	1962-03-30	1962-11-16
1963	1963-01-11	1963-09-21
1964	1964-02-12	1964-11-18
1965	1965-01-08	1965-12-16
1966	1966-02-21	1966-12-07
1967	1967-05-28	1967-12-15
1968	1968-03-10	1968-11-01
1969	1969-01-26	1969-10-30
1970	1970-03-27	1970-11-03
1971	1971-01-03	1971-12-14
1972	1972-04-13	1972-11-21
1973	1973-02-14	1973-10-11
1974	1974-01-01	1974-12-26
1975	1975-01-09	1975-11-26
1976	1976-01-07	1976-11-27
1977	1977-01-06	1977-11-07
1978	1978-01-24	1978-11-25
1979	1979-01-13	1979-12-27
1980	1980-01-19	1980-09-10
1981	1981-03-03	1981-10-03
1982	1982-01-06	1982-12-24
1983	1983-07-06	1983-12-28
1984	1984-03-23	1984-12-15

Every Fixed Threshold

Fixed thresholds at Chacon
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	62	27	1921	13
25 mm (0.98 in): Days with 25 mm or more rain	53	7	1912	3
50 mm (1.97 in): Days with 50 mm or more rain	9	2	1921	1
10 cm (3.9 in): Days with 10 cm or more snowfall	54	15	1920	15
25 cm (9.8 in): Days with 25 cm or more snowfall	30	3	1912	1
50 cm (19.7 in): Days with 50 cm or more snowfall	3	1	1973	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1910.

Download the Data

Data for Chacon 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).

Chacon Threshold Days by Year (USC00291653)

Key Facts for Chacon Thresholds

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

Every Fixed Threshold

Download the Data

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