Iluppur Threshold Days by Year (IN020131000)

5 fixed thresholds counted per year at Iluppur (IN020131000): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Iluppur Thresholds

Iluppur: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1902 with 43.
Iluppur: days with 25 mm (0.98 in) or more of precipitation in 67 years, most in 1920 with 18.
Iluppur: days with 50 mm (1.97 in) or more of precipitation in 64 years, most in 1933 with 8.
Iluppur: days with 100 mm (3.94 in) or more of precipitation in 14 years, most in 1930 with 4.
5 fixed thresholds have at least one qualifying day at Iluppur.

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

68 years with a qualifying day

Days per year at Iluppur with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 43 in 1902.

Days with 10 mm (0.39 in) or more of precipitation per year at Iluppur
Year	Days	Decade average
1901	29	28.2
1902	43	28.2
1903	41	28.2
1904	19	28.2
1905	29	28.2
1906	21	28.2
1907	19	28.2
1908	26	28.2
1909	27	28.2
1910	29	27.6
1911	22	27.6
1912	29	27.6
1913	28	27.6
1914	30	27.6
1915	31	27.6
1916	16	27.6
1917	34	27.6
1918	29	27.6
1919	28	27.6
1920	42	28.4
1921	29	28.4
1922	32	28.4
1923	24	28.4
1924	36	28.4
1925	28	28.4
1926	18	28.4
1927	21	28.4
1928	24	28.4
1929	30	28.4
1930	29	28.5
1931	36	28.5
1932	27	28.5
1933	30	28.5
1934	21	28.5
1935	29	28.5
1936	27	28.5
1937	32	28.5
1938	22	28.5
1939	32	28.5
1940	24	20
1941	25	20
1942	22	20
1943	27	20
1944	16	20
1945	10	20
1946	12	20
1947	17	20
1948	19	20
1949	28	20
1950	26	23.3
1951	17	23.3
1952	19	23.3
1953	33	23.3
1954	29	23.3
1955	16	23.3
1956	23	23.3
1957	24	23.3
1958	27	23.3
1959	19	23.3
1960	24	26.8
1961	26	26.8
1962	28	26.8
1963	35	26.8
1966	32	26.8
1967	21	26.8
1968	33	26.8
1969	15	26.8
1970	27	27

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

First to last qualifying date each year at Iluppur
Year	First date	Last date
1901	1901-03-18	1901-12-12
1902	1902-01-04	1902-12-15
1903	1903-01-06	1903-12-31
1904	1904-01-02	1904-12-19
1905	1905-04-11	1905-11-25
1906	1906-02-28	1906-12-06
1907	1907-04-04	1907-11-08
1908	1908-02-24	1908-10-29
1909	1909-01-01	1909-11-17
1910	1910-02-19	1910-11-17
1911	1911-04-16	1911-12-24
1912	1912-01-15	1912-12-01
1913	1913-04-17	1913-12-19
1914	1914-01-03	1914-12-06
1915	1915-03-03	1915-12-27
1916	1916-04-21	1916-12-03
1917	1917-03-08	1917-12-08
1918	1918-01-02	1918-12-19
1919	1919-05-23	1919-12-30
1920	1920-01-01	1920-11-30
1921	1921-01-10	1921-12-31
1922	1922-03-05	1922-12-02
1923	1923-01-11	1923-12-16
1924	1924-01-08	1924-12-08
1925	1925-03-14	1925-12-28
1926	1926-01-26	1926-12-16
1927	1927-02-10	1927-11-11
1928	1928-02-04	1928-12-28
1929	1929-04-25	1929-12-24
1930	1930-01-09	1930-12-02
1931	1931-01-13	1931-12-25
1932	1932-03-04	1932-12-03
1933	1933-04-09	1933-12-17
1934	1934-01-25	1934-11-28
1935	1935-01-22	1935-12-25
1936	1936-02-23	1936-12-20
1937	1937-01-13	1937-11-19
1938	1938-02-06	1938-12-28
1939	1939-01-11	1939-11-17
1940	1940-05-07	1940-11-26
1941	1941-04-02	1941-12-17
1942	1942-05-29	1942-12-17
1943	1943-01-03	1943-12-22
1944	1944-02-22	1944-12-13
1945	1945-08-03	1945-11-13
1946	1946-05-07	1946-12-05
1947	1947-03-02	1947-10-07
1948	1948-01-17	1948-11-17
1949	1949-04-08	1949-11-27
1950	1950-02-20	1950-12-13
1951	1951-07-05	1951-11-29
1952	1952-02-20	1952-12-06
1953	1953-02-20	1953-12-16
1954	1954-01-05	1954-12-12
1955	1955-04-18	1955-12-02
1956	1956-01-11	1956-12-26
1957	1957-02-02	1957-12-29
1958	1958-04-13	1958-12-04
1959	1959-02-02	1959-12-02
1960	1960-02-22	1960-11-22
1961	1961-01-09	1961-12-05
1962	1962-04-06	1962-12-02
1963	1963-01-08	1963-12-07
1966	1966-04-30	1966-12-21
1967	1967-05-14	1967-11-11
1968	1968-03-27	1968-12-20
1969	1969-04-11	1969-12-31
1970	1970-03-05	1970-11-23

Every Fixed Threshold

Fixed thresholds at Iluppur
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	43	1902	27
25 mm (0.98 in): Days with 25 mm or more rain	67	18	1920	15
50 mm (1.97 in): Days with 50 mm or more rain	64	8	1933	4
100 mm (3.94 in): Days with 100 mm or more rain	14	4	1930	1
200 mm (7.87 in): Days with 200 mm or more rain	3	1	1930	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 Iluppur 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).

Iluppur Threshold Days by Year (IN020131000)

Key Facts for Iluppur Thresholds

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

Every Fixed Threshold

Download the Data

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