Cheyyar Threshold Days by Year

5 fixed thresholds counted per year at Cheyyar (IN020040200): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cheyyar Thresholds

Cheyyar: days with 10 mm (0.39 in) or more of precipitation in 70 years, most in 1944 with 47.
Cheyyar: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1931 with 26.
Cheyyar: days with 50 mm (1.97 in) or more of precipitation in 70 years, most in 1929 with 12.
Cheyyar: days with 100 mm (3.94 in) or more of precipitation in 53 years, most in 1969 with 6.
5 fixed thresholds have at least one qualifying day at Cheyyar.

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

70 years with a qualifying day

Days per year at Cheyyar with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 47 in 1944.

Days with 10 mm (0.39 in) or more of precipitation per year at Cheyyar
Year	Days	Decade average
1901	39	33.6
1902	39	33.6
1903	39	33.6
1904	24	33.6
1905	33	33.6
1906	35	33.6
1907	29	33.6
1908	28	33.6
1909	36	33.6
1910	23	31.9
1911	28	31.9
1912	30	31.9
1913	38	31.9
1914	42	31.9
1915	30	31.9
1916	32	31.9
1917	30	31.9
1918	34	31.9
1919	32	31.9
1920	38	32.9
1921	32	32.9
1922	33	32.9
1923	35	32.9
1924	27	32.9
1925	37	32.9
1926	20	32.9
1927	27	32.9
1928	43	32.9
1929	37	32.9
1930	36	29
1931	46	29
1932	33	29
1933	22	29
1934	22	29
1935	18	29
1936	26	29
1937	34	29
1938	26	29
1939	27	29
1940	35	31.6
1941	29	31.6
1942	21	31.6
1943	46	31.6
1944	47	31.6
1945	27	31.6
1946	42	31.6
1947	21	31.6
1948	26	31.6
1949	22	31.6
1950	19	25.6
1951	19	25.6
1952	22	25.6
1953	24	25.6
1954	34	25.6
1955	30	25.6
1956	27	25.6
1957	32	25.6
1958	28	25.6
1959	21	25.6
1960	47	31.1
1961	33	31.1
1962	25	31.1
1963	30	31.1
1964	27	31.1
1965	35	31.1
1966	39	31.1
1967	20	31.1
1968	23	31.1
1969	32	31.1
1970	31	31

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

First to last qualifying date each year at Cheyyar
Year	First date	Last date
1901	1901-01-09	1901-12-11
1902	1902-01-06	1902-12-15
1903	1903-02-22	1903-12-31
1904	1904-07-24	1904-12-20
1905	1905-01-06	1905-11-25
1906	1906-01-16	1906-12-27
1907	1907-06-22	1907-12-20
1908	1908-02-24	1908-12-31
1909	1909-01-01	1909-11-28
1910	1910-07-08	1910-11-21
1911	1911-06-01	1911-12-25
1912	1912-07-20	1912-12-14
1913	1913-05-19	1913-12-20
1914	1914-04-04	1914-12-06
1915	1915-01-15	1915-12-26
1916	1916-07-04	1916-12-08
1917	1917-05-29	1917-12-11
1918	1918-01-02	1918-12-12
1919	1919-05-02	1919-12-31
1920	1920-01-01	1920-11-29
1921	1921-01-10	1921-12-30
1922	1922-01-01	1922-12-02
1923	1923-01-11	1923-12-05
1924	1924-01-05	1924-12-16
1925	1925-01-13	1925-12-28
1926	1926-01-25	1926-11-09
1927	1927-02-10	1927-12-23
1928	1928-01-04	1928-12-28
1929	1929-01-08	1929-12-25
1930	1930-01-06	1930-12-05
1931	1931-01-06	1931-12-27
1932	1932-04-13	1932-12-15
1933	1933-03-11	1933-12-22
1934	1934-01-10	1934-12-16
1935	1935-01-08	1935-12-23
1936	1936-02-02	1936-12-11
1937	1937-01-13	1937-12-11
1938	1938-02-07	1938-11-01
1939	1939-03-21	1939-12-13
1940	1940-05-19	1940-12-16
1941	1941-04-13	1941-12-03
1942	1942-04-24	1942-12-19
1943	1943-01-03	1943-12-23
1944	1944-01-11	1944-12-21
1945	1945-03-14	1945-11-18
1946	1946-01-20	1946-12-31
1947	1947-01-02	1947-11-27
1948	1948-01-17	1948-12-21
1949	1949-04-09	1949-11-21
1950	1950-02-24	1950-11-16
1951	1951-01-01	1951-12-08
1952	1952-01-29	1952-12-08
1953	1953-01-09	1953-12-26
1954	1954-01-04	1954-12-26
1955	1955-01-09	1955-11-30
1956	1956-01-29	1956-11-30
1957	1957-06-03	1957-12-02
1958	1958-05-05	1958-12-14
1959	1959-05-31	1959-12-19
1960	1960-01-21	1960-12-30
1961	1961-01-11	1961-12-04
1962	1962-06-13	1962-12-27
1963	1963-01-09	1963-10-28
1964	1964-07-19	1964-12-29
1965	1965-04-18	1965-12-27
1966	1966-01-30	1966-12-21
1967	1967-04-22	1967-12-15
1968	1968-04-27	1968-12-18
1969	1969-05-18	1969-12-31
1970	1970-02-19	1970-12-27

Every Fixed Threshold

Fixed thresholds at Cheyyar
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	70	47	1944	31
25 mm (0.98 in): Days with 25 mm or more rain	70	26	1931	10
50 mm (1.97 in): Days with 50 mm or more rain	70	12	1929	6
100 mm (3.94 in): Days with 100 mm or more rain	53	6	1969	4
200 mm (7.87 in): Days with 200 mm or more rain	9	2	1969	2

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 Cheyyar 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).

Cheyyar Threshold Days by Year

Key Facts for Cheyyar Thresholds

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

Every Fixed Threshold

Download the Data

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