Fortaleza Threshold Days by Year (BR028724960)

5 fixed thresholds counted per year at Fortaleza (BR028724960): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Fortaleza Thresholds

Fortaleza: days with 10 mm (0.39 in) or more of precipitation in 54 years, most in 1964 with 68.
Fortaleza: days with 25 mm (0.98 in) or more of precipitation in 54 years, most in 1964 with 31.
Fortaleza: days with 50 mm (1.97 in) or more of precipitation in 54 years, most in 1920 with 11.
Fortaleza: days with 100 mm (3.94 in) or more of precipitation in 18 years, most in 1957 with 2.
5 fixed thresholds have at least one qualifying day at Fortaleza.

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

54 years with a qualifying day

Days per year at Fortaleza 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 Fortaleza
Year	Days	Decade average
1920	34	39.9
1921	60	39.9
1922	57	39.9
1923	41	39.9
1925	28	39.9
1926	34	39.9
1927	37	39.9
1928	24	39.9
1929	44	39.9
1930	32	38.9
1931	32	38.9
1932	24	38.9
1933	34	38.9
1934	61	38.9
1935	53	38.9
1936	28	38.9
1937	32	38.9
1938	42	38.9
1939	51	38.9
1940	46	38.4
1941	21	38.4
1942	20	38.4
1943	24	38.4
1944	35	38.4
1945	55	38.4
1946	44	38.4
1947	49	38.4
1948	38	38.4
1949	52	38.4
1950	41	30.5
1951	22	30.5
1952	37	30.5
1953	30	30.5
1954	31	30.5
1955	31	30.5
1956	23	30.5
1957	27	30.5
1958	18	30.5
1959	45	30.5
1960	26	45.8
1962	36	45.8
1963	42	45.8
1964	68	45.8
1966	35	45.8
1967	63	45.8
1968	37	45.8
1969	59	45.8
1970	29	48.1
1971	52	48.1
1972	35	48.1
1973	41	48.1
1974	80	48.1
1975	59	48.1
1976	41	48.1

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

First to last qualifying date each year at Fortaleza
Year	First date	Last date
1920	1920-02-18	1920-12-30
1921	1921-01-03	1921-12-17
1922	1922-01-06	1922-11-30
1923	1923-01-22	1923-10-19
1925	1925-01-07	1925-06-11
1926	1926-01-08	1926-06-11
1927	1927-01-23	1927-12-07
1928	1928-01-05	1928-06-26
1929	1929-02-04	1929-06-22
1930	1930-01-20	1930-12-24
1931	1931-01-09	1931-07-29
1932	1932-01-20	1932-10-03
1933	1933-01-16	1933-08-02
1934	1934-01-03	1934-12-23
1935	1935-01-03	1935-10-06
1936	1936-01-01	1936-09-04
1937	1937-02-19	1937-09-28
1938	1938-01-05	1938-08-15
1939	1939-01-04	1939-11-19
1940	1940-01-12	1940-12-29
1941	1941-02-11	1941-12-17
1942	1942-01-30	1942-06-08
1943	1943-02-16	1943-12-22
1944	1944-01-03	1944-12-22
1945	1945-01-14	1945-07-05
1946	1946-01-01	1946-12-23
1947	1947-01-21	1947-12-21
1948	1948-01-27	1948-07-13
1949	1949-01-10	1949-08-22
1950	1950-01-06	1950-07-22
1951	1951-02-12	1951-12-16
1952	1952-01-06	1952-05-26
1953	1953-01-05	1953-06-09
1954	1954-02-14	1954-06-29
1955	1955-01-22	1955-12-07
1956	1956-01-10	1956-08-15
1957	1957-01-23	1957-09-01
1958	1958-02-12	1958-07-27
1959	1959-01-20	1959-06-25
1960	1960-01-08	1960-06-14
1962	1962-01-22	1962-09-19
1963	1963-01-13	1963-12-28
1964	1964-01-08	1964-09-17
1966	1966-01-21	1966-09-15
1967	1967-02-03	1967-09-04
1968	1968-01-25	1968-12-27
1969	1969-01-23	1969-08-04
1970	1970-01-21	1970-08-16
1971	1971-01-21	1971-10-16
1972	1972-02-11	1972-12-23
1973	1973-01-28	1973-10-18
1974	1974-01-15	1974-11-30
1975	1975-01-23	1975-12-11
1976	1976-01-12	1976-11-19

Every Fixed Threshold

Fixed thresholds at Fortaleza
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	54	68	1964	41
25 mm (0.98 in): Days with 25 mm or more rain	54	31	1964	18
50 mm (1.97 in): Days with 50 mm or more rain	54	11	1920	9
100 mm (3.94 in): Days with 100 mm or more rain	18	2	1957	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1949	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.

Download the Data

Data for Fortaleza 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).

Fortaleza Threshold Days by Year (BR028724960)

Key Facts for Fortaleza Thresholds

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

Every Fixed Threshold

Download the Data

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