Ponneri Threshold Days by Year

5 fixed thresholds counted per year at Ponneri (IN020040600): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ponneri Thresholds

Ponneri: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1930 with 50.
Ponneri: days with 25 mm (0.98 in) or more of precipitation in 68 years, most in 1930 with 30.
Ponneri: days with 50 mm (1.97 in) or more of precipitation in 68 years, most in 1946 with 15.
Ponneri: days with 100 mm (3.94 in) or more of precipitation in 50 years, most in 1946 with 6.
5 fixed thresholds have at least one qualifying day at Ponneri.

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

68 years with a qualifying day

Days per year at Ponneri with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 50 in 1930.

Days with 10 mm (0.39 in) or more of precipitation per year at Ponneri
Year	Days	Decade average
1901	32	27.8
1902	34	27.8
1903	40	27.8
1904	12	27.8
1905	27	27.8
1906	32	27.8
1907	22	27.8
1908	29	27.8
1909	22	27.8
1910	24	32
1911	25	32
1912	29	32
1913	33	32
1914	34	32
1915	28	32
1916	28	32
1917	42	32
1918	37	32
1919	40	32
1920	32	30.9
1921	33	30.9
1922	31	30.9
1923	24	30.9
1924	27	30.9
1925	40	30.9
1926	25	30.9
1927	29	30.9
1928	31	30.9
1929	37	30.9
1930	50	28.8
1931	32	28.8
1932	26	28.8
1933	24	28.8
1934	23	28.8
1935	19	28.8
1936	35	28.8
1937	30	28.8
1938	19	28.8
1939	30	28.8
1940	30	33.9
1941	35	33.9
1942	26	33.9
1943	40	33.9
1944	44	33.9
1945	30	33.9
1946	48	33.9
1947	35	33.9
1948	26	33.9
1949	25	33.9
1950	23	26.4
1951	21	26.4
1952	20	26.4
1953	31	26.4
1954	30	26.4
1957	32	26.4
1958	31	26.4
1959	23	26.4
1960	31	35.4
1961	40	35.4
1962	39	35.4
1963	37	35.4
1964	30	35.4
1965	41	35.4
1966	37	35.4
1967	35	35.4
1968	30	35.4
1969	34	35.4
1970	18	18

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

First to last qualifying date each year at Ponneri
Year	First date	Last date
1901	1901-02-14	1901-12-10
1902	1902-07-04	1902-12-15
1903	1903-01-04	1903-12-31
1904	1904-01-01	1904-12-21
1905	1905-01-06	1905-12-14
1906	1906-01-16	1906-12-27
1907	1907-04-12	1907-12-19
1908	1908-03-27	1908-12-31
1909	1909-01-01	1909-11-27
1910	1910-07-10	1910-11-24
1911	1911-06-04	1911-12-25
1912	1912-01-16	1912-11-23
1913	1913-04-15	1913-12-19
1914	1914-01-02	1914-11-07
1915	1915-01-15	1915-11-26
1916	1916-06-19	1916-12-04
1917	1917-05-04	1917-12-13
1918	1918-01-01	1918-12-12
1919	1919-01-05	1919-12-31
1920	1920-01-01	1920-11-28
1921	1921-01-12	1921-12-30
1922	1922-01-09	1922-11-30
1923	1923-01-10	1923-12-04
1924	1924-01-05	1924-11-30
1925	1925-01-13	1925-12-28
1926	1926-01-26	1926-12-09
1927	1927-05-31	1927-12-07
1928	1928-01-04	1928-12-25
1929	1929-01-07	1929-12-25
1930	1930-01-07	1930-12-28
1931	1931-04-13	1931-12-25
1932	1932-02-24	1932-12-15
1933	1933-03-13	1933-12-17
1934	1934-01-10	1934-12-21
1935	1935-01-07	1935-12-24
1936	1936-02-03	1936-12-19
1937	1937-04-17	1937-12-11
1938	1938-02-10	1938-10-30
1939	1939-01-10	1939-12-13
1940	1940-04-24	1940-12-17
1941	1941-06-04	1941-12-16
1942	1942-04-08	1942-12-20
1943	1943-01-03	1943-12-21
1944	1944-02-20	1944-12-21
1945	1945-04-01	1945-11-19
1946	1946-01-20	1946-12-31
1947	1947-01-02	1947-12-21
1948	1948-05-26	1948-12-19
1949	1949-05-21	1949-11-17
1950	1950-05-26	1950-11-16
1951	1951-04-12	1951-11-30
1952	1952-02-25	1952-12-09
1953	1953-06-25	1953-12-27
1954	1954-01-05	1954-12-24
1957	1957-05-25	1957-11-14
1958	1958-05-06	1958-12-14
1959	1959-05-31	1959-12-11
1960	1960-01-21	1960-12-10
1961	1961-01-11	1961-11-30
1962	1962-04-16	1962-12-27
1963	1963-01-10	1963-12-09
1964	1964-06-25	1964-12-29
1965	1965-02-09	1965-12-16
1966	1966-01-02	1966-12-06
1967	1967-01-11	1967-12-28
1968	1968-04-24	1968-12-19
1969	1969-05-18	1969-12-16
1970	1970-02-18	1970-11-22

Every Fixed Threshold

Fixed thresholds at Ponneri
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	50	1930	18
25 mm (0.98 in): Days with 25 mm or more rain	68	30	1930	12
50 mm (1.97 in): Days with 50 mm or more rain	68	15	1946	5
100 mm (3.94 in): Days with 100 mm or more rain	50	6	1946	1
200 mm (7.87 in): Days with 200 mm or more rain	9	2	1933	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 Ponneri 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Ponneri Threshold Days by Year

Key Facts for Ponneri Thresholds

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

Every Fixed Threshold

Download the Data

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