Oeiras Threshold Days by Year (BR037450750)

4 fixed thresholds counted per year at Oeiras (BR037450750): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Oeiras Thresholds

Oeiras: days with 10 mm (0.39 in) or more of precipitation in 55 years, most in 1978 with 44.
Oeiras: days with 25 mm (0.98 in) or more of precipitation in 55 years, most in 1964 with 20.
Oeiras: days with 50 mm (1.97 in) or more of precipitation in 51 years, most in 1934 with 7.
Oeiras: days with 100 mm (3.94 in) or more of precipitation in 7 years, most in 1960 with 2.
4 fixed thresholds have at least one qualifying day at Oeiras.

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

55 years with a qualifying day

Days per year at Oeiras with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 44 in 1978.

Days with 10 mm (0.39 in) or more of precipitation per year at Oeiras
Year	Days	Decade average
1914	21	23.3
1915	15	23.3
1916	34	23.3
1921	31	28.7
1922	30	28.7
1923	25	28.7
1930	21	27.2
1932	17	27.2
1933	37	27.2
1934	35	27.2
1935	27	27.2
1936	22	27.2
1937	32	27.2
1938	25	27.2
1939	29	27.2
1940	34	27.6
1943	31	27.6
1944	29	27.6
1945	26	27.6
1946	23	27.6
1947	32	27.6
1948	23	27.6
1949	23	27.6
1950	21	22.6
1951	26	22.6
1952	27	22.6
1953	20	22.6
1954	15	22.6
1955	18	22.6
1956	22	22.6
1957	33	22.6
1958	21	22.6
1959	23	22.6
1960	34	29.5
1961	29	29.5
1962	34	29.5
1963	27	29.5
1964	26	29.5
1965	27	29.5
1966	35	29.5
1967	28	29.5
1968	31	29.5
1969	24	29.5
1970	16	28.5
1971	25	28.5
1972	21	28.5
1974	36	28.5
1976	29	28.5
1977	28	28.5
1978	44	28.5
1979	29	28.5
1980	32	24.8
1981	28	24.8
1982	20	24.8
1983	19	24.8

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

First to last qualifying date each year at Oeiras
Year	First date	Last date
1914	1914-01-05	1914-12-27
1915	1915-01-13	1915-12-19
1916	1916-01-11	1916-12-27
1921	1921-01-03	1921-12-11
1922	1922-01-07	1922-12-24
1923	1923-01-08	1923-12-31
1930	1930-01-07	1930-10-26
1932	1932-01-20	1932-12-20
1933	1933-01-09	1933-12-31
1934	1934-01-01	1934-12-22
1935	1935-01-02	1935-12-27
1936	1936-01-13	1936-12-11
1937	1937-01-12	1937-12-26
1938	1938-01-12	1938-12-30
1939	1939-01-03	1939-12-23
1940	1940-01-02	1940-12-20
1943	1943-01-11	1943-12-24
1944	1944-01-20	1944-12-30
1945	1945-01-01	1945-12-20
1946	1946-01-02	1946-12-18
1947	1947-01-08	1947-12-30
1948	1948-01-19	1948-12-22
1949	1949-01-10	1949-12-24
1950	1950-01-10	1950-12-28
1951	1951-01-10	1951-12-27
1952	1952-01-10	1952-12-16
1953	1953-01-03	1953-12-17
1954	1954-01-22	1954-12-07
1955	1955-02-01	1955-12-27
1956	1956-01-03	1956-12-31
1957	1957-01-10	1957-12-24
1958	1958-01-10	1958-12-31
1959	1959-01-06	1959-12-27
1960	1960-01-03	1960-12-20
1961	1961-01-03	1961-12-14
1962	1962-01-04	1962-12-25
1963	1963-01-06	1963-12-27
1964	1964-01-01	1964-12-05
1965	1965-01-02	1965-12-23
1966	1966-01-03	1966-12-27
1967	1967-01-25	1967-12-29
1968	1968-01-09	1968-12-28
1969	1969-01-18	1969-12-29
1970	1970-01-18	1970-11-28
1971	1971-01-07	1971-12-23
1972	1972-01-14	1972-12-22
1974	1974-01-12	1974-12-28
1976	1976-01-08	1976-12-20
1977	1977-01-03	1977-12-28
1978	1978-01-01	1978-12-30
1979	1979-01-06	1979-12-20
1980	1980-01-05	1980-12-29
1981	1981-01-01	1981-12-23
1982	1982-01-08	1982-12-26
1983	1983-01-01	1983-12-26

Every Fixed Threshold

Fixed thresholds at Oeiras
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	44	1978	19
25 mm (0.98 in): Days with 25 mm or more rain	55	20	1964	8
50 mm (1.97 in): Days with 50 mm or more rain	51	7	1934	3
100 mm (3.94 in): Days with 100 mm or more rain	7	2	1960	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.

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Data for Oeiras 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).

Oeiras Threshold Days by Year (BR037450750)

Key Facts for Oeiras Thresholds

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

Every Fixed Threshold

Download the Data

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