Acude Riachao Threshold Days by Year (BR028821880)

5 fixed thresholds counted per year at Acude Riachao (BR028821880): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Acude Riachao Thresholds

Acude Riachao: days with 10 mm (0.39 in) or more of precipitation in 55 years, most in 1964 with 68.
Acude Riachao: days with 25 mm (0.98 in) or more of precipitation in 55 years, most in 1974 with 29.
Acude Riachao: days with 50 mm (1.97 in) or more of precipitation in 51 years, most in 1921 with 10.
Acude Riachao: days with 100 mm (3.94 in) or more of precipitation in 7 years, most in 1936 with 1.
5 fixed thresholds have at least one qualifying day at Acude Riachao.

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

55 years with a qualifying day

Days per year at Acude Riachao with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 68 in 1964.

Days with 10 mm (0.39 in) or more of precipitation per year at Acude Riachao
Year	Days	Decade average
1921	57	39.3
1922	46	39.3
1923	30	39.3
1924	57	39.3
1925	34	39.3
1926	34	39.3
1927	35	39.3
1928	17	39.3
1929	44	39.3
1930	23	36.5
1931	29	36.5
1932	16	36.5
1933	34	36.5
1934	58	36.5
1935	54	36.5
1936	16	36.5
1937	36	36.5
1938	45	36.5
1939	54	36.5
1940	49	35.5
1941	18	35.5
1948	27	35.5
1949	48	35.5
1950	40	24.7
1951	24	24.7
1952	32	24.7
1953	19	24.7
1954	20	24.7
1955	30	24.7
1956	24	24.7
1957	26	24.7
1958	4	24.7
1959	28	24.7
1960	20	39.6
1961	48	39.6
1962	35	39.6
1963	50	39.6
1964	68	39.6
1965	47	39.6
1966	20	39.6
1967	42	39.6
1968	35	39.6
1969	31	39.6
1970	20	40.6
1971	40	40.6
1972	24	40.6
1973	55	40.6
1974	62	40.6
1975	51	40.6
1976	32	40.6
1977	55	40.6
1978	34	40.6
1979	33	40.6
1980	25	27
1981	29	27

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

First to last qualifying date each year at Acude Riachao
Year	First date	Last date
1921	1921-01-04	1921-12-16
1922	1922-01-25	1922-12-27
1923	1923-01-16	1923-11-23
1924	1924-01-24	1924-12-30
1925	1925-01-25	1925-10-31
1926	1926-01-09	1926-06-05
1927	1927-01-28	1927-07-25
1928	1928-01-07	1928-06-03
1929	1929-01-22	1929-12-11
1930	1930-01-20	1930-06-16
1931	1931-01-01	1931-08-22
1932	1932-01-26	1932-06-28
1933	1933-01-15	1933-12-31
1934	1934-01-01	1934-12-20
1935	1935-01-20	1935-06-23
1936	1936-01-01	1936-06-16
1937	1937-02-06	1937-12-01
1938	1938-01-07	1938-06-10
1939	1939-01-04	1939-12-05
1940	1940-01-09	1940-07-25
1941	1941-02-09	1941-12-17
1948	1948-01-26	1948-12-15
1949	1949-02-02	1949-07-12
1950	1950-01-14	1950-12-06
1951	1951-01-16	1951-12-27
1952	1952-01-09	1952-05-18
1953	1953-02-18	1953-06-09
1954	1954-02-14	1954-05-15
1955	1955-01-23	1955-12-28
1956	1956-01-05	1956-05-17
1957	1957-01-11	1957-12-24
1958	1958-02-21	1958-05-14
1959	1959-01-21	1959-06-03
1960	1960-03-07	1960-12-16
1961	1961-01-22	1961-12-13
1962	1962-01-23	1962-12-30
1963	1963-01-12	1963-12-27
1964	1964-01-09	1964-09-16
1965	1965-01-09	1965-12-24
1966	1966-02-09	1966-12-04
1967	1967-02-03	1967-07-20
1968	1968-01-24	1968-07-06
1969	1969-01-03	1969-06-26
1970	1970-02-02	1970-07-02
1971	1971-01-11	1971-10-14
1972	1972-01-23	1972-12-22
1973	1973-01-02	1973-08-03
1974	1974-01-14	1974-12-23
1975	1975-01-23	1975-12-06
1976	1976-01-31	1976-11-18
1977	1977-01-10	1977-08-26
1978	1978-01-15	1978-12-06
1979	1979-01-19	1979-09-06
1980	1980-01-14	1980-11-17
1981	1981-01-17	1981-12-24

Every Fixed Threshold

Fixed thresholds at Acude Riachao
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	55	68	1964	29
25 mm (0.98 in): Days with 25 mm or more rain	55	29	1974	10
50 mm (1.97 in): Days with 50 mm or more rain	51	10	1921	2
100 mm (3.94 in): Days with 100 mm or more rain	7	1	1936	1
200 mm (7.87 in): Days with 200 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 1921.

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Data for Acude Riachao 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).

Acude Riachao Threshold Days by Year (BR028821880)

Key Facts for Acude Riachao Thresholds

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

Every Fixed Threshold

Download the Data

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