Lanka Threshold Days by Year (IN003070100)

5 fixed thresholds counted per year at Lanka (IN003070100): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lanka Thresholds

Lanka: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1940 with 60.
Lanka: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1912 with 36.
Lanka: days with 50 mm (1.97 in) or more of precipitation in 32 years, most in 1913 with 11.
Lanka: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1913 with 3.
5 fixed thresholds have at least one qualifying day at Lanka.

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

42 years with a qualifying day

Days per year at Lanka with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 60 in 1940.

Days with 10 mm (0.39 in) or more of precipitation per year at Lanka
Year	Days	Decade average
1901	39	42.3
1902	40	42.3
1903	58	42.3
1904	47	42.3
1905	42	42.3
1906	54	42.3
1907	34	42.3
1908	24	42.3
1910	38	39.6
1911	36	39.6
1912	41	39.6
1913	46	39.6
1914	29	39.6
1915	47	39.6
1916	29	39.6
1917	37	39.6
1918	55	39.6
1919	38	39.6
1920	49	37.7
1921	50	37.7
1922	27	37.7
1923	34	37.7
1924	42	37.7
1925	44	37.7
1926	38	37.7
1927	39	37.7
1928	26	37.7
1929	28	37.7
1930	47	38
1931	44	38
1932	37	38
1933	33	38
1934	44	38
1935	26	38
1936	34	38
1937	35	38
1938	31	38
1939	49	38
1940	60	40.3
1942	47	40.3
1944	22	40.3
1945	32	40.3

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

First to last qualifying date each year at Lanka
Year	First date	Last date
1901	1901-04-03	1901-11-26
1902	1902-03-03	1902-10-16
1903	1903-02-16	1903-10-31
1904	1904-01-31	1904-11-25
1905	1905-02-16	1905-10-26
1906	1906-02-10	1906-10-31
1907	1907-03-07	1907-09-27
1908	1908-04-26	1908-10-18
1910	1910-02-18	1910-10-20
1911	1911-02-24	1911-10-16
1912	1912-02-02	1912-11-02
1913	1913-02-12	1913-12-13
1914	1914-02-18	1914-11-11
1915	1915-02-21	1915-10-20
1916	1916-02-18	1916-11-11
1917	1917-02-05	1917-10-31
1918	1918-03-18	1918-10-11
1919	1919-04-04	1919-10-26
1920	1920-02-28	1920-10-12
1921	1921-01-24	1921-10-16
1922	1922-01-30	1922-09-25
1923	1923-02-25	1923-10-12
1924	1924-04-10	1924-11-29
1925	1925-03-22	1925-10-28
1926	1926-03-01	1926-12-28
1927	1927-01-13	1927-11-17
1928	1928-02-08	1928-11-20
1929	1929-01-26	1929-10-25
1930	1930-01-26	1930-11-20
1931	1931-02-11	1931-10-24
1932	1932-02-06	1932-11-16
1933	1933-04-14	1933-11-10
1934	1934-02-23	1934-11-07
1935	1935-02-08	1935-10-08
1936	1936-02-15	1936-10-07
1937	1937-04-04	1937-10-15
1938	1938-03-17	1938-11-11
1939	1939-02-14	1939-10-24
1940	1940-02-04	1940-10-22
1942	1942-02-21	1942-10-13
1944	1944-01-25	1944-09-30
1945	1945-03-21	1945-09-29

Every Fixed Threshold

Fixed thresholds at Lanka
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	42	60	1940	32
25 mm (0.98 in): Days with 25 mm or more rain	42	36	1912	12
50 mm (1.97 in): Days with 50 mm or more rain	32	11	1913	3
100 mm (3.94 in): Days with 100 mm or more rain	6	3	1913	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1904	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 Lanka 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).

Lanka Threshold Days by Year (IN003070100)

Key Facts for Lanka Thresholds

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

Every Fixed Threshold

Download the Data

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