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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Islampur Threshold Days by Year (IN004100700)

5 fixed thresholds counted per year at Islampur (IN004100700): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Islampur Thresholds

  • Islampur: days with 10 mm (0.39 in) or more of precipitation in 58 years, most in 1961 with 49.
  • Islampur: days with 25 mm (0.98 in) or more of precipitation in 58 years, most in 1962 with 28.
  • Islampur: days with 50 mm (1.97 in) or more of precipitation in 56 years, most in 1962 with 14.
  • Islampur: days with 100 mm (3.94 in) or more of precipitation in 21 years, most in 1960 with 5.
  • 5 fixed thresholds have at least one qualifying day at Islampur.
58 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Islampur Days per year at Islampur with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 1961. 02040601904: 291905: 291906: 271907: 231908: 191909: 341910: 101911: 341912: 201913: 231916: 381917: 401918: 281919: 341920: 271921: 261922: 391923: 331924: 331925: 361926: 361927: 171929: 301930: 201931: 271932: 361933: 341934: 261935: 191936: 311937: 251938: 411939: 371940: 291941: 341942: 301943: 271944: 351945: 301946: 311947: 141948: 221949: 311950: 171951: 161952: 271953: 361954: 321955: 291956: 281960: 401961: 491962: 431964: 251967: 251968: 301969: 271970: 211904191019181924193119371943194919551967
Days per year at Islampur with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 1961.
Days with 10 mm (0.39 in) or more of precipitation per year at Islampur
YearDaysDecade average
19042926.8
19052926.8
19062726.8
19072326.8
19081926.8
19093426.8
19101028.4
19113428.4
19122028.4
19132328.4
19163828.4
19174028.4
19182828.4
19193428.4
19202730.8
19212630.8
19223930.8
19233330.8
19243330.8
19253630.8
19263630.8
19271730.8
19293030.8
19302029.6
19312729.6
19323629.6
19333429.6
19342629.6
19351929.6
19363129.6
19372529.6
19384129.6
19393729.6
19402928.3
19413428.3
19423028.3
19432728.3
19443528.3
19453028.3
19463128.3
19471428.3
19482228.3
19493128.3
19501726.4
19511626.4
19522726.4
19533626.4
19543226.4
19552926.4
19562826.4
19604034.1
19614934.1
19624334.1
19642534.1
19672534.1
19683034.1
19692734.1
19702121
First to last qualifying date each year at Islampur For each year, a bar from the first to the last day at Islampur meeting 10 mm (0.39 in). 1904: 27 May 1904 to 18 October 19041905: 9 March 1905 to 29 September 19051906: 15 February 1906 to 30 September 19061907: 3 February 1907 to 25 September 19071908: 11 January 1908 to 30 September 19081909: 24 April 1909 to 4 October 19091910: 14 June 1910 to 12 November 19101911: 11 June 1911 to 12 November 19111912: 21 June 1912 to 24 November 19121913: 18 May 1913 to 13 December 19131916: 6 June 1916 to 22 November 19161917: 4 February 1917 to 7 October 19171918: 14 May 1918 to 8 September 19181919: 22 January 1919 to 3 October 19191920: 3 February 1920 to 20 September 19201921: 22 January 1921 to 12 October 19211922: 11 January 1922 to 22 September 19221923: 11 February 1923 to 4 October 19231924: 25 February 1924 to 9 November 19241925: 7 January 1925 to 9 November 19251926: 9 January 1926 to 1 October 19261927: 24 February 1927 to 16 November 19271929: 26 January 1929 to 9 October 19291930: 12 June 1930 to 20 November 19301931: 8 February 1931 to 5 November 19311932: 19 February 1932 to 4 November 19321933: 21 January 1933 to 25 October 19331934: 29 January 1934 to 6 November 19341935: 17 January 1935 to 21 September 19351936: 24 January 1936 to 5 October 19361937: 12 February 1937 to 5 October 19371938: 9 May 1938 to 18 September 19381939: 21 February 1939 to 2 October 19391940: 4 February 1940 to 22 December 19401941: 28 January 1941 to 10 October 19411942: 20 February 1942 to 17 October 19421943: 23 January 1943 to 23 September 19431944: 24 January 1944 to 6 October 19441945: 6 January 1945 to 22 October 19451946: 9 April 1946 to 20 November 19461947: 6 May 1947 to 27 August 19471948: 5 January 1948 to 14 October 19481949: 6 February 1949 to 1 November 19491950: 10 February 1950 to 17 August 19501951: 31 May 1951 to 1 October 19511952: 3 June 1952 to 22 September 19521953: 15 January 1953 to 30 September 19531954: 21 June 1954 to 24 October 19541955: 2 May 1955 to 11 October 19551956: 12 May 1956 to 31 October 19561960: 7 March 1960 to 2 October 19601961: 3 January 1961 to 19 December 19611962: 26 January 1962 to 5 October 19621964: 20 June 1964 to 28 August 19641967: 21 March 1967 to 20 September 19671968: 7 January 1968 to 27 December 19681969: 1 May 1969 to 27 September 19691970: 21 January 1970 to 6 October 197019041912192219311939194719551969JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Islampur meeting 10 mm (0.39 in).
First to last qualifying date each year at Islampur
YearFirst dateLast date
19041904-05-271904-10-18
19051905-03-091905-09-29
19061906-02-151906-09-30
19071907-02-031907-09-25
19081908-01-111908-09-30
19091909-04-241909-10-04
19101910-06-141910-11-12
19111911-06-111911-11-12
19121912-06-211912-11-24
19131913-05-181913-12-13
19161916-06-061916-11-22
19171917-02-041917-10-07
19181918-05-141918-09-08
19191919-01-221919-10-03
19201920-02-031920-09-20
19211921-01-221921-10-12
19221922-01-111922-09-22
19231923-02-111923-10-04
19241924-02-251924-11-09
19251925-01-071925-11-09
19261926-01-091926-10-01
19271927-02-241927-11-16
19291929-01-261929-10-09
19301930-06-121930-11-20
19311931-02-081931-11-05
19321932-02-191932-11-04
19331933-01-211933-10-25
19341934-01-291934-11-06
19351935-01-171935-09-21
19361936-01-241936-10-05
19371937-02-121937-10-05
19381938-05-091938-09-18
19391939-02-211939-10-02
19401940-02-041940-12-22
19411941-01-281941-10-10
19421942-02-201942-10-17
19431943-01-231943-09-23
19441944-01-241944-10-06
19451945-01-061945-10-22
19461946-04-091946-11-20
19471947-05-061947-08-27
19481948-01-051948-10-14
19491949-02-061949-11-01
19501950-02-101950-08-17
19511951-05-311951-10-01
19521952-06-031952-09-22
19531953-01-151953-09-30
19541954-06-211954-10-24
19551955-05-021955-10-11
19561956-05-121956-10-31
19601960-03-071960-10-02
19611961-01-031961-12-19
19621962-01-261962-10-05
19641964-06-201964-08-28
19671967-03-211967-09-20
19681968-01-071968-12-27
19691969-05-011969-09-27
19701970-01-211970-10-06

Every Fixed Threshold

Fixed thresholds at Islampur
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain5849196121
25 mm (0.98 in): Days with 25 mm or more rain582819627
50 mm (1.97 in): Days with 50 mm or more rain561419622
100 mm (3.94 in): Days with 100 mm or more rain21519603
200 mm (7.87 in): Days with 200 mm or more rain2119601

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

  • Data for Islampur 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 . Last revised (2025-12-31).