Iawakia Threshold Days by Year

4 fixed thresholds counted per year at Iawakia (ASN00009558): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Iawakia Thresholds

Iawakia: days with 10 mm (0.39 in) or more of precipitation in 58 years, most in 1979 with 39.
Iawakia: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1961 with 8.
Iawakia: days with 50 mm (1.97 in) or more of precipitation in 10 years, most in 1947 with 3.
Iawakia: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 2005 with 1.
4 fixed thresholds have at least one qualifying day at Iawakia.

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

58 years with a qualifying day

Days per year at Iawakia with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 39 in 1979.

Days with 10 mm (0.39 in) or more of precipitation per year at Iawakia
Year	Days	Decade average
1938	17	17
1940	12	22.3
1941	22	22.3
1942	30	22.3
1943	28	22.3
1944	15	22.3
1945	32	22.3
1946	18	22.3
1947	23	22.3
1948	17	22.3
1949	26	22.3
1950	22	21
1951	26	21
1952	22	21
1953	23	21
1954	10	21
1955	34	21
1956	13	21
1958	21	21
1959	18	21
1960	26	24.8
1961	30	24.8
1962	25	24.8
1963	26	24.8
1964	23	24.8
1965	26	24.8
1966	19	24.8
1967	26	24.8
1968	25	24.8
1969	22	24.8
1970	27	28.7
1971	33	28.7
1972	21	28.7
1973	24	28.7
1974	24	28.7
1975	24	28.7
1976	32	28.7
1977	30	28.7
1978	33	28.7
1979	39	28.7
1980	31	25
1982	20	25
1983	21	25
1987	20	25
1988	30	25
1989	28	25
1990	22	24.1
1991	23	24.1
1992	22	24.1
1993	24	24.1
1994	20	24.1
1995	26	24.1
1996	33	24.1
1997	18	24.1
1998	26	24.1
1999	27	24.1
2001	19	21.5
2005	24	21.5

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

First to last qualifying date each year at Iawakia
Year	First date	Last date
1938	1938-04-21	1938-12-04
1940	1940-04-11	1940-12-18
1941	1941-03-16	1941-10-19
1942	1942-03-15	1942-12-04
1943	1943-01-31	1943-12-14
1944	1944-05-06	1944-12-08
1945	1945-03-26	1945-12-25
1946	1946-05-27	1946-12-04
1947	1947-04-07	1947-11-27
1948	1948-06-05	1948-11-16
1949	1949-01-26	1949-11-19
1950	1950-05-09	1950-11-29
1951	1951-01-17	1951-12-05
1952	1952-01-23	1952-10-27
1953	1953-02-02	1953-12-21
1954	1954-04-23	1954-11-11
1955	1955-02-13	1955-12-10
1956	1956-03-05	1956-12-05
1958	1958-01-27	1958-12-22
1959	1959-02-09	1959-12-31
1960	1960-01-08	1960-10-16
1961	1961-01-26	1961-12-16
1962	1962-05-26	1962-12-27
1963	1963-01-30	1963-11-01
1964	1964-06-09	1964-12-19
1965	1965-01-14	1965-12-19
1966	1966-04-12	1966-10-23
1967	1967-02-18	1967-10-05
1968	1968-01-27	1968-10-31
1969	1969-03-13	1969-12-10
1970	1970-02-05	1970-12-03
1971	1971-01-31	1971-12-08
1972	1972-04-07	1972-10-08
1973	1973-04-10	1973-12-01
1974	1974-01-28	1974-11-24
1975	1975-04-02	1975-11-17
1976	1976-02-23	1976-11-28
1977	1977-04-27	1977-12-22
1978	1978-01-02	1978-11-03
1979	1979-01-13	1979-11-13
1980	1980-04-03	1980-11-26
1982	1982-01-21	1982-12-11
1983	1983-02-05	1983-12-31
1987	1987-03-17	1987-11-15
1988	1988-01-13	1988-11-08
1989	1989-01-03	1989-12-24
1990	1990-01-29	1990-11-17
1991	1991-02-27	1991-12-26
1992	1992-02-13	1992-12-10
1993	1993-03-18	1993-12-31
1994	1994-05-12	1994-10-15
1995	1995-03-25	1995-12-24
1996	1996-01-30	1996-12-13
1997	1997-02-26	1997-12-03
1998	1998-03-11	1998-12-02
1999	1999-03-20	1999-12-02
2001	2001-03-08	2001-12-19
2005	2005-02-15	2005-11-28

Every Fixed Threshold

Fixed thresholds at Iawakia
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	58	39	1979	24
25 mm (0.98 in): Days with 25 mm or more rain	56	8	1961	6
50 mm (1.97 in): Days with 50 mm or more rain	10	3	1947	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	2005	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.

Download the Data

Data for Iawakia 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).

Iawakia Threshold Days by Year

Key Facts for Iawakia Thresholds

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

Every Fixed Threshold

Download the Data

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