Ico Threshold Days by Year (BR000638014)

4 fixed thresholds counted per year at Ico (BR000638014): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ico Thresholds

Ico: days with 10 mm (0.39 in) or more of precipitation in 80 years, most in 1985 with 52.
Ico: days with 25 mm (0.98 in) or more of precipitation in 80 years, most in 1985 with 21.
Ico: days with 50 mm (1.97 in) or more of precipitation in 74 years, most in 1985 with 9.
Ico: days with 100 mm (3.94 in) or more of precipitation in 14 years, most in 1922 with 2.
4 fixed thresholds have at least one qualifying day at Ico.

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

80 years with a qualifying day

Days per year at Ico with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 52 in 1985.

Days with 10 mm (0.39 in) or more of precipitation per year at Ico
Year	Days	Decade average
1912	24	24.5
1913	27	24.5
1914	31	24.5
1915	11	24.5
1916	26	24.5
1917	45	24.5
1918	29	24.5
1919	3	24.5
1920	27	29.3
1921	32	29.3
1922	31	29.3
1923	27	29.3
1930	13	20.5
1931	19	20.5
1932	10	20.5
1933	29	20.5
1934	33	20.5
1935	20	20.5
1936	22	20.5
1937	20	20.5
1938	14	20.5
1939	25	20.5
1940	32	24.7
1941	22	24.7
1942	11	24.7
1943	22	24.7
1944	24	24.7
1945	27	24.7
1946	29	24.7
1947	37	24.7
1948	21	24.7
1949	22	24.7
1950	20	19.8
1951	13	19.8
1952	21	19.8
1953	18	19.8
1954	24	19.8
1955	20	19.8
1956	23	19.8
1957	24	19.8
1958	13	19.8
1959	22	19.8
1960	23	23.9
1961	28	23.9
1962	23	23.9
1964	33	23.9
1965	23	23.9
1966	13	23.9
1967	30	23.9
1968	22	23.9
1969	20	23.9
1970	18	28
1971	28	28
1972	23	28
1973	28	28
1974	44	28
1975	40	28
1976	20	28
1977	30	28
1979	21	28
1980	22	26.7
1982	9	26.7
1983	11	26.7
1984	27	26.7
1985	52	26.7
1986	37	26.7
1987	26	26.7
1988	23	26.7
1989	33	26.7
1990	16	21
1991	22	21
1992	19	21
1993	10	21
1994	18	21
1995	29	21
1996	26	21
1997	28	21
1998	17	21
1999	25	21
2000	29	29

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

First to last qualifying date each year at Ico
Year	First date	Last date
1912	1912-01-16	1912-09-29
1913	1913-01-06	1913-12-10
1914	1914-01-14	1914-10-30
1915	1915-02-01	1915-12-18
1916	1916-01-20	1916-12-31
1917	1917-01-02	1917-12-18
1918	1918-01-01	1918-12-31
1919	1919-02-15	1919-07-12
1920	1920-02-06	1920-12-31
1921	1921-01-04	1921-12-12
1922	1922-01-13	1922-12-02
1923	1923-01-04	1923-06-07
1930	1930-01-26	1930-10-27
1931	1931-01-09	1931-06-26
1932	1932-01-29	1932-05-16
1933	1933-01-15	1933-12-27
1934	1934-01-02	1934-12-17
1935	1935-01-26	1935-09-23
1936	1936-01-23	1936-09-23
1937	1937-01-07	1937-06-13
1938	1938-03-03	1938-04-25
1939	1939-01-03	1939-12-27
1940	1940-01-01	1940-06-13
1941	1941-01-07	1941-11-05
1942	1942-02-06	1942-12-11
1943	1943-01-23	1943-11-07
1944	1944-01-17	1944-12-24
1945	1945-01-13	1945-12-03
1946	1946-01-02	1946-12-21
1947	1947-01-22	1947-12-31
1948	1948-01-18	1948-12-01
1949	1949-02-02	1949-11-28
1950	1950-01-14	1950-04-25
1951	1951-01-11	1951-12-15
1952	1952-01-10	1952-12-16
1953	1953-01-16	1953-11-28
1954	1954-01-20	1954-11-27
1955	1955-01-19	1955-11-01
1956	1956-02-02	1956-05-13
1957	1957-01-06	1957-12-05
1958	1958-01-14	1958-12-06
1959	1959-01-12	1959-11-24
1960	1960-01-08	1960-05-20
1961	1961-01-16	1961-06-02
1962	1962-01-21	1962-12-17
1964	1964-01-09	1964-10-31
1965	1965-01-12	1965-10-05
1966	1966-01-31	1966-09-25
1967	1967-03-07	1967-12-30
1968	1968-01-25	1968-12-20
1969	1969-01-22	1969-09-25
1970	1970-01-19	1970-11-08
1971	1971-01-21	1971-09-13
1972	1972-01-08	1972-12-22
1973	1973-01-04	1973-12-12
1974	1974-01-13	1974-12-07
1975	1975-01-20	1975-12-06
1976	1976-01-28	1976-12-16
1977	1977-01-05	1977-12-31
1979	1979-01-15	1979-11-19
1980	1980-01-11	1980-06-10
1982	1982-01-08	1982-07-20
1983	1983-02-04	1983-04-05
1984	1984-02-05	1984-11-16
1985	1985-01-19	1985-12-26
1986	1986-02-06	1986-11-26
1987	1987-01-04	1987-07-29
1988	1988-01-22	1988-12-23
1989	1989-01-01	1989-12-25
1990	1990-02-11	1990-11-16
1991	1991-01-19	1991-05-19
1992	1992-01-25	1992-06-11
1993	1993-01-17	1993-08-01
1994	1994-01-05	1994-12-30
1995	1995-01-01	1995-11-24
1996	1996-01-06	1996-12-29
1997	1997-01-07	1997-12-22
1998	1998-01-02	1998-12-30
1999	1999-01-31	1999-12-31
2000	2000-01-08	2000-12-23

Every Fixed Threshold

Fixed thresholds at Ico
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	80	52	1985	29
25 mm (0.98 in): Days with 25 mm or more rain	80	21	1985	11
50 mm (1.97 in): Days with 50 mm or more rain	74	9	1985	5
100 mm (3.94 in): Days with 100 mm or more rain	14	2	1922	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.

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Data for Ico 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).

Ico Threshold Days by Year (BR000638014)

Key Facts for Ico Thresholds

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

Every Fixed Threshold

Download the Data

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