Chatsu Threshold Days by Year (IN019130200)

5 fixed thresholds counted per year at Chatsu (IN019130200): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chatsu Thresholds

Chatsu: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1961 with 35.
Chatsu: days with 25 mm (0.98 in) or more of precipitation in 66 years, most in 1959 with 17.
Chatsu: days with 50 mm (1.97 in) or more of precipitation in 58 years, most in 1961 with 8.
Chatsu: days with 100 mm (3.94 in) or more of precipitation in 21 years, most in 1912 with 2.
5 fixed thresholds have at least one qualifying day at Chatsu.

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

68 years with a qualifying day

Days per year at Chatsu with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 1961.

Days with 10 mm (0.39 in) or more of precipitation per year at Chatsu
Year	Days	Decade average
1901	9	15.9
1902	13	15.9
1903	15	15.9
1904	24	15.9
1905	6	15.9
1906	8	15.9
1907	17	15.9
1908	25	15.9
1909	26	15.9
1910	11	15.8
1911	8	15.8
1912	15	15.8
1913	12	15.8
1914	18	15.8
1915	11	15.8
1916	20	15.8
1917	33	15.8
1918	10	15.8
1919	20	15.8
1920	18	15.6
1921	16	15.6
1922	13	15.6
1923	16	15.6
1924	24	15.6
1925	6	15.6
1926	23	15.6
1927	12	15.6
1928	14	15.6
1929	14	15.6
1930	14	14.9
1931	16	14.9
1932	14	14.9
1933	27	14.9
1934	18	14.9
1935	17	14.9
1936	15	14.9
1937	13	14.9
1938	9	14.9
1939	6	14.9
1940	19	18.4
1941	5	18.4
1942	19	18.4
1943	21	18.4
1944	17	18.4
1945	30	18.4
1946	22	18.4
1947	21	18.4
1948	16	18.4
1949	14	18.4
1950	19	21.1
1951	12	21.1
1952	16	21.1
1953	15	21.1
1954	18	21.1
1955	23	21.1
1956	25	21.1
1957	25	21.1
1958	29	21.1
1959	29	21.1
1960	19	19.5
1961	35	19.5
1962	16	19.5
1963	20	19.5
1964	21	19.5
1966	13	19.5
1968	12	19.5
1969	20	19.5
1970	18	18

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

First to last qualifying date each year at Chatsu
Year	First date	Last date
1901	1901-01-08	1901-10-18
1902	1902-07-04	1902-09-21
1903	1903-07-15	1903-09-12
1904	1904-05-15	1904-12-17
1905	1905-02-16	1905-09-13
1906	1906-07-02	1906-09-12
1907	1907-02-18	1907-08-19
1908	1908-01-11	1908-09-02
1909	1909-01-11	1909-12-14
1910	1910-06-15	1910-10-01
1911	1911-06-14	1911-10-31
1912	1912-06-11	1912-09-06
1913	1913-05-17	1913-12-04
1914	1914-06-24	1914-09-17
1915	1915-02-02	1915-08-22
1916	1916-06-11	1916-09-26
1917	1917-05-06	1917-10-24
1918	1918-01-22	1918-09-03
1919	1919-01-18	1919-11-21
1920	1920-05-24	1920-08-27
1921	1921-01-20	1921-09-20
1922	1922-05-24	1922-09-14
1923	1923-05-16	1923-12-02
1924	1924-07-02	1924-12-09
1925	1925-05-29	1925-07-21
1926	1926-03-06	1926-09-17
1927	1927-02-20	1927-12-18
1928	1928-02-02	1928-12-01
1929	1929-07-04	1929-12-19
1930	1930-01-13	1930-10-29
1931	1931-07-02	1931-08-26
1932	1932-03-24	1932-09-06
1933	1933-04-16	1933-09-25
1934	1934-06-04	1934-08-26
1935	1935-04-05	1935-12-11
1936	1936-03-30	1936-09-10
1937	1937-06-24	1937-12-31
1938	1938-06-11	1938-08-24
1939	1939-06-13	1939-09-08
1940	1940-01-18	1940-08-27
1941	1941-06-18	1941-09-11
1942	1942-06-30	1942-09-04
1943	1943-06-14	1943-09-14
1944	1944-01-24	1944-09-17
1945	1945-01-01	1945-09-25
1946	1946-06-09	1946-09-13
1947	1947-01-04	1947-09-16
1948	1948-01-19	1948-09-24
1949	1949-06-26	1949-09-18
1950	1950-06-12	1950-09-19
1951	1951-06-14	1951-11-26
1952	1952-06-20	1952-08-26
1953	1953-01-12	1953-09-18
1954	1954-06-14	1954-10-01
1955	1955-06-30	1955-10-05
1956	1956-07-04	1956-10-04
1957	1957-01-09	1957-09-13
1958	1958-06-09	1958-11-29
1959	1959-01-20	1959-11-06
1960	1960-03-10	1960-08-19
1961	1961-02-01	1961-10-08
1962	1962-07-08	1962-09-20
1963	1963-04-30	1963-09-05
1964	1964-05-26	1964-09-12
1966	1966-05-12	1966-09-08
1968	1968-07-07	1968-08-19
1969	1969-07-15	1969-09-13
1970	1970-02-19	1970-09-11

Every Fixed Threshold

Fixed thresholds at Chatsu
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	68	35	1961	18
25 mm (0.98 in): Days with 25 mm or more rain	66	17	1959	10
50 mm (1.97 in): Days with 50 mm or more rain	58	8	1961	3
100 mm (3.94 in): Days with 100 mm or more rain	21	2	1912	2
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1959	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

Data for Chatsu 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).

Chatsu Threshold Days by Year (IN019130200)

Key Facts for Chatsu Thresholds

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

Every Fixed Threshold

Download the Data

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