Patna Obsy Threshold Days by Year (IN004100100)

5 fixed thresholds counted per year at Patna Obsy (IN004100100): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Patna Obsy Thresholds

Patna Obsy: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1949 with 43.
Patna Obsy: days with 25 mm (0.98 in) or more of precipitation in 67 years, most in 1913 with 27.
Patna Obsy: days with 50 mm (1.97 in) or more of precipitation in 66 years, most in 1904 with 14.
Patna Obsy: days with 100 mm (3.94 in) or more of precipitation in 39 years, most in 1918 with 4.
5 fixed thresholds have at least one qualifying day at Patna Obsy.

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

67 years with a qualifying day

Days per year at Patna Obsy with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 43 in 1949.

Days with 10 mm (0.39 in) or more of precipitation per year at Patna Obsy
Year	Days	Decade average
1901	20	27.3
1902	32	27.3
1903	20	27.3
1904	32	27.3
1905	38	27.3
1906	28	27.3
1907	21	27.3
1908	21	27.3
1909	34	27.3
1910	37	33
1911	34	33
1912	27	33
1913	40	33
1914	30	33
1915	32	33
1916	34	33
1917	34	33
1918	31	33
1919	31	33
1920	22	28.4
1921	32	28.4
1922	40	28.4
1923	23	28.4
1924	34	28.4
1925	28	28.4
1926	25	28.4
1927	22	28.4
1928	23	28.4
1929	35	28.4
1930	25	29.6
1931	22	29.6
1932	23	29.6
1933	35	29.6
1934	24	29.6
1935	24	29.6
1936	41	29.6
1937	33	29.6
1938	35	29.6
1939	34	29.6
1940	26	30.4
1941	23	30.4
1942	34	30.4
1943	29	30.4
1944	32	30.4
1945	27	30.4
1946	32	30.4
1947	29	30.4
1948	29	30.4
1949	43	30.4
1950	20	27.3
1951	23	27.3
1952	31	27.3
1953	33	27.3
1954	27	27.3
1955	29	27.3
1956	35	27.3
1957	23	27.3
1958	22	27.3
1959	30	27.3
1960	27	24.9
1961	21	24.9
1962	25	24.9
1963	29	24.9
1964	32	24.9
1965	24	24.9
1966	19	24.9
1967	22	24.9

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

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

Every Fixed Threshold

Fixed thresholds at Patna Obsy
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	67	43	1949	22
25 mm (0.98 in): Days with 25 mm or more rain	67	27	1913	9
50 mm (1.97 in): Days with 50 mm or more rain	66	14	1904	6
100 mm (3.94 in): Days with 100 mm or more rain	39	4	1918	4
200 mm (7.87 in): Days with 200 mm or more rain	5	1	1902	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 Patna Obsy 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).

Patna Obsy Threshold Days by Year (IN004100100)

Key Facts for Patna Obsy Thresholds

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

Every Fixed Threshold

Download the Data

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