Manamathurai Threshold Days by Year (IN020100600)

4 fixed thresholds counted per year at Manamathurai (IN020100600): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Manamathurai Thresholds

Manamathurai: days with 10 mm (0.39 in) or more of precipitation in 66 years, most in 1946 with 45.
Manamathurai: days with 25 mm (0.98 in) or more of precipitation in 66 years, most in 1946 with 31.
Manamathurai: days with 50 mm (1.97 in) or more of precipitation in 58 years, most in 1946 with 19.
Manamathurai: days with 100 mm (3.94 in) or more of precipitation in 20 years, most in 1946 with 8.
4 fixed thresholds have at least one qualifying day at Manamathurai.

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

66 years with a qualifying day

Days per year at Manamathurai with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 45 in 1946.

Days with 10 mm (0.39 in) or more of precipitation per year at Manamathurai
Year	Days	Decade average
1904	16	21.3
1905	23	21.3
1906	27	21.3
1907	18	21.3
1908	20	21.3
1909	24	21.3
1910	27	23.7
1911	18	23.7
1912	21	23.7
1913	20	23.7
1914	26	23.7
1915	26	23.7
1916	20	23.7
1917	24	23.7
1918	18	23.7
1919	37	23.7
1920	23	23.1
1921	23	23.1
1922	19	23.1
1923	24	23.1
1924	23	23.1
1925	24	23.1
1926	17	23.1
1927	22	23.1
1928	22	23.1
1929	34	23.1
1930	24	23.8
1931	24	23.8
1932	30	23.8
1933	22	23.8
1934	18	23.8
1935	19	23.8
1936	24	23.8
1937	23	23.8
1938	25	23.8
1939	29	23.8
1940	30	29.1
1941	29	29.1
1942	31	29.1
1943	27	29.1
1944	37	29.1
1945	26	29.1
1946	45	29.1
1947	27	29.1
1948	20	29.1
1949	19	29.1
1950	20	25
1951	29	25
1952	22	25
1953	25	25
1954	30	25
1955	34	25
1956	22	25
1957	27	25
1958	22	25
1959	19	25
1960	35	21.8
1961	17	21.8
1962	24	21.8
1963	29	21.8
1964	12	21.8
1965	23	21.8
1966	20	21.8
1968	15	21.8
1969	21	21.8
1970	17	17

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

First to last qualifying date each year at Manamathurai
Year	First date	Last date
1904	1904-01-09	1904-12-18
1905	1905-04-12	1905-11-23
1906	1906-01-18	1906-12-28
1907	1907-03-29	1907-12-17
1908	1908-01-18	1908-11-07
1909	1909-01-03	1909-12-30
1910	1910-04-16	1910-11-11
1911	1911-04-16	1911-12-24
1912	1912-04-25	1912-12-01
1913	1913-04-17	1913-12-18
1914	1914-04-11	1914-12-08
1915	1915-01-17	1915-12-26
1916	1916-04-21	1916-11-20
1917	1917-01-31	1917-12-09
1918	1918-01-02	1918-12-14
1919	1919-05-11	1919-12-15
1920	1920-01-01	1920-11-29
1921	1921-01-13	1921-12-30
1922	1922-05-09	1922-12-02
1923	1923-01-11	1923-12-17
1924	1924-01-09	1924-11-12
1925	1925-01-14	1925-12-28
1926	1926-01-15	1926-10-30
1927	1927-03-08	1927-12-07
1928	1928-02-08	1928-12-30
1929	1929-01-08	1929-12-25
1930	1930-01-04	1930-12-02
1931	1931-01-17	1931-12-24
1932	1932-02-24	1932-12-13
1933	1933-03-13	1933-11-25
1934	1934-01-10	1934-11-17
1935	1935-04-15	1935-12-25
1936	1936-03-18	1936-12-19
1937	1937-02-01	1937-11-21
1938	1938-02-04	1938-12-28
1939	1939-03-21	1939-11-22
1940	1940-04-25	1940-12-04
1941	1941-01-06	1941-12-16
1942	1942-03-02	1942-12-21
1943	1943-01-02	1943-12-06
1944	1944-01-13	1944-12-22
1945	1945-03-10	1945-12-08
1946	1946-03-17	1946-12-17
1947	1947-01-01	1947-10-25
1948	1948-01-01	1948-12-29
1949	1949-01-01	1949-11-23
1950	1950-02-20	1950-11-13
1951	1951-03-26	1951-11-30
1952	1952-02-21	1952-12-12
1953	1953-02-20	1953-12-26
1954	1954-01-05	1954-12-28
1955	1955-04-06	1955-12-05
1956	1956-06-14	1956-12-28
1957	1957-02-03	1957-12-31
1958	1958-02-01	1958-12-05
1959	1959-04-08	1959-12-02
1960	1960-02-23	1960-12-10
1961	1961-01-07	1961-12-05
1962	1962-01-31	1962-12-05
1963	1963-01-08	1963-12-10
1964	1964-03-21	1964-12-25
1965	1965-02-14	1965-12-04
1966	1966-06-02	1966-12-21
1968	1968-04-20	1968-12-06
1969	1969-04-05	1969-12-31
1970	1970-01-01	1970-11-06

Every Fixed Threshold

Fixed thresholds at Manamathurai
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	66	45	1946	17
25 mm (0.98 in): Days with 25 mm or more rain	66	31	1946	10
50 mm (1.97 in): Days with 50 mm or more rain	58	19	1946	1
100 mm (3.94 in): Days with 100 mm or more rain	20	8	1946	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

Data for Manamathurai 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).

Manamathurai Threshold Days by Year (IN020100600)

Key Facts for Manamathurai Thresholds

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

Every Fixed Threshold

Download the Data

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