Mercanam Threshold Days by Year

5 fixed thresholds counted per year at Mercanam (IN020021500): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mercanam Thresholds

Mercanam: days with 10 mm (0.39 in) or more of precipitation in 63 years, most in 1944 with 50.
Mercanam: days with 25 mm (0.98 in) or more of precipitation in 63 years, most in 1963 with 26.
Mercanam: days with 50 mm (1.97 in) or more of precipitation in 63 years, most in 1913 with 15.
Mercanam: days with 100 mm (3.94 in) or more of precipitation in 39 years, most in 1954 with 4.
5 fixed thresholds have at least one qualifying day at Mercanam.

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

63 years with a qualifying day

Days per year at Mercanam with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 50 in 1944.

Days with 10 mm (0.39 in) or more of precipitation per year at Mercanam
Year	Days	Decade average
1901	36	32.2
1902	41	32.2
1903	37	32.2
1904	23	32.2
1905	33	32.2
1906	44	32.2
1907	26	32.2
1908	23	32.2
1909	27	32.2
1910	33	29.2
1911	31	29.2
1912	30	29.2
1913	32	29.2
1915	25	29.2
1916	27	29.2
1917	24	29.2
1918	35	29.2
1919	26	29.2
1920	33	31
1921	35	31
1922	38	31
1923	32	31
1924	19	31
1925	39	31
1926	22	31
1927	27	31
1928	39	31
1929	26	31
1930	33	28.8
1931	39	28.8
1932	32	28.8
1933	24	28.8
1934	23	28.8
1935	28	28.8
1936	27	28.8
1937	32	28.8
1938	23	28.8
1939	27	28.8
1940	38	32.4
1941	31	32.4
1942	22	32.4
1943	40	32.4
1944	50	32.4
1945	24	32.4
1946	44	32.4
1947	24	32.4
1948	28	32.4
1949	23	32.4
1950	19	26.1
1951	26	26.1
1952	23	26.1
1953	21	26.1
1954	34	26.1
1955	33	26.1
1956	32	26.1
1957	33	26.1
1958	29	26.1
1959	11	26.1
1960	38	42.8
1961	34	42.8
1962	48	42.8
1963	46	42.8
1965	48	42.8

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

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

Every Fixed Threshold

Fixed thresholds at Mercanam
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	63	50	1944	48
25 mm (0.98 in): Days with 25 mm or more rain	63	26	1963	24
50 mm (1.97 in): Days with 50 mm or more rain	63	15	1913	11
100 mm (3.94 in): Days with 100 mm or more rain	39	4	1954	2
200 mm (7.87 in): Days with 200 mm or more rain	6	1	1906	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 Mercanam 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

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

Mercanam Threshold Days by Year

Key Facts for Mercanam Thresholds

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

Every Fixed Threshold

Download the Data

Related