Porteiras Threshold Days by Year (BR038510750)

4 fixed thresholds counted per year at Porteiras (BR038510750): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Porteiras Thresholds

Porteiras: days with 10 mm (0.39 in) or more of precipitation in 61 years, most in 1924 with 61.
Porteiras: days with 25 mm (0.98 in) or more of precipitation in 61 years, most in 1924 with 32.
Porteiras: days with 50 mm (1.97 in) or more of precipitation in 58 years, most in 1924 with 11.
Porteiras: days with 100 mm (3.94 in) or more of precipitation in 14 years, most in 1939 with 2.
4 fixed thresholds have at least one qualifying day at Porteiras.

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

61 years with a qualifying day

Days per year at Porteiras with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 61 in 1924.

Days with 10 mm (0.39 in) or more of precipitation per year at Porteiras
Year	Days	Decade average
1912	32	28.8
1913	31	28.8
1914	32	28.8
1915	17	28.8
1916	32	28.8
1917	43	28.8
1918	29	28.8
1919	14	28.8
1920	28	34.1
1921	38	34.1
1922	42	34.1
1924	61	34.1
1925	30	34.1
1926	21	34.1
1927	25	34.1
1928	33	34.1
1929	29	34.1
1930	22	20.7
1936	17	20.7
1939	23	20.7
1940	40	27.9
1941	41	27.9
1942	11	27.9
1943	30	27.9
1944	27	27.9
1946	23	27.9
1947	30	27.9
1948	30	27.9
1949	19	27.9
1950	25	19.6
1951	9	19.6
1952	18	19.6
1953	13	19.6
1954	31	19.6
1955	27	19.6
1956	21	19.6
1957	24	19.6
1958	8	19.6
1960	28	29.3
1961	15	29.3
1962	28	29.3
1963	38	29.3
1964	31	29.3
1965	27	29.3
1966	27	29.3
1967	37	29.3
1968	30	29.3
1969	32	29.3
1970	20	31.4
1971	31	31.4
1972	23	31.4
1973	34	31.4
1974	39	31.4
1975	42	31.4
1976	28	31.4
1977	33	31.4
1978	36	31.4
1979	28	31.4
1980	36	22.7
1982	16	22.7
1983	16	22.7

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

First to last qualifying date each year at Porteiras
Year	First date	Last date
1912	1912-01-14	1912-11-03
1913	1913-01-04	1913-12-22
1914	1914-01-13	1914-10-28
1915	1915-01-24	1915-12-24
1916	1916-01-13	1916-12-27
1917	1917-01-10	1917-12-22
1918	1918-01-10	1918-12-31
1919	1919-01-12	1919-08-08
1920	1920-02-01	1920-12-30
1921	1921-01-02	1921-12-09
1922	1922-01-06	1922-12-01
1924	1924-01-11	1924-12-31
1925	1925-01-01	1925-12-31
1926	1926-01-09	1926-06-07
1927	1927-01-14	1927-12-12
1928	1928-01-06	1928-12-05
1929	1929-01-23	1929-12-31
1930	1930-01-27	1930-12-28
1936	1936-01-16	1936-12-24
1939	1939-01-21	1939-12-27
1940	1940-01-03	1940-12-27
1941	1941-01-03	1941-12-24
1942	1942-01-05	1942-12-26
1943	1943-01-25	1943-11-27
1944	1944-01-12	1944-12-26
1946	1946-01-04	1946-12-05
1947	1947-01-01	1947-12-23
1948	1948-01-01	1948-12-21
1949	1949-01-30	1949-11-24
1950	1950-02-07	1950-12-28
1951	1951-01-08	1951-12-27
1952	1952-01-11	1952-12-16
1953	1953-01-03	1953-11-26
1954	1954-01-05	1954-12-21
1955	1955-01-17	1955-12-12
1956	1956-02-03	1956-12-31
1957	1957-01-08	1957-12-17
1958	1958-01-17	1958-03-27
1960	1960-01-05	1960-12-28
1961	1961-01-18	1961-04-29
1962	1962-01-13	1962-12-16
1963	1963-01-10	1963-12-25
1964	1964-01-01	1964-12-20
1965	1965-01-07	1965-12-13
1966	1966-01-22	1966-12-26
1967	1967-01-02	1967-12-29
1968	1968-01-09	1968-12-27
1969	1969-01-21	1969-12-28
1970	1970-01-13	1970-10-08
1971	1971-01-12	1971-12-08
1972	1972-01-07	1972-12-22
1973	1973-01-03	1973-10-16
1974	1974-01-18	1974-07-07
1975	1975-01-07	1975-12-06
1976	1976-01-07	1976-12-30
1977	1977-01-05	1977-12-21
1978	1978-01-07	1978-12-24
1979	1979-01-14	1979-12-20
1980	1980-01-05	1980-12-28
1982	1982-01-10	1982-12-31
1983	1983-01-26	1983-12-02

Every Fixed Threshold

Fixed thresholds at Porteiras
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	61	61	1924	16
25 mm (0.98 in): Days with 25 mm or more rain	61	32	1924	4
50 mm (1.97 in): Days with 50 mm or more rain	58	11	1924	2
100 mm (3.94 in): Days with 100 mm or more rain	14	2	1939	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 Porteiras 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).

Porteiras Threshold Days by Year (BR038510750)

Key Facts for Porteiras Thresholds

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

Every Fixed Threshold

Download the Data

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