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Built 2026-10-19 (19 October 2026)

Hilsa Threshold Days by Year

4 fixed thresholds counted per year at Hilsa (IN004100600): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hilsa Thresholds

  • Hilsa: days with 10 mm (0.39 in) or more of precipitation in 39 years, most in 1911 with 50.
  • Hilsa: days with 25 mm (0.98 in) or more of precipitation in 39 years, most in 1909 with 23.
  • Hilsa: days with 50 mm (1.97 in) or more of precipitation in 36 years, most in 1948 with 15.
  • Hilsa: days with 100 mm (3.94 in) or more of precipitation in 19 years, most in 1948 with 4.
  • 4 fixed thresholds have at least one qualifying day at Hilsa.
39 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Hilsa Days per year at Hilsa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 50 in 1911. 02040601906: 321907: 261908: 221909: 351910: 431911: 501912: 341913: 391914: 291915: 321916: 431917: 481918: 361920: 261921: 191922: 361923: 241924: 311925: 211926: 231927: 281928: 331929: 281930: 271932: 141933: 391934: 241935: 141936: 261937: 241938: 221939: 271940: 211943: 291948: 221949: 161950: 151952: 261953: 301906191019141918192319271932193619401950
Days per year at Hilsa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 50 in 1911.
Days with 10 mm (0.39 in) or more of precipitation per year at Hilsa
YearDaysDecade average
19063228.8
19072628.8
19082228.8
19093528.8
19104339.3
19115039.3
19123439.3
19133939.3
19142939.3
19153239.3
19164339.3
19174839.3
19183639.3
19202626.9
19211926.9
19223626.9
19232426.9
19243126.9
19252126.9
19262326.9
19272826.9
19283326.9
19292826.9
19302724.1
19321424.1
19333924.1
19342424.1
19351424.1
19362624.1
19372424.1
19382224.1
19392724.1
19402122
19432922
19482222
19491622
19501523.7
19522623.7
19533023.7
First to last qualifying date each year at Hilsa For each year, a bar from the first to the last day at Hilsa meeting 10 mm (0.39 in). 1906: 15 February 1906 to 1 October 19061907: 5 February 1907 to 21 September 19071908: 12 January 1908 to 30 September 19081909: 17 April 1909 to 30 September 19091910: 2 June 1910 to 13 November 19101911: 27 January 1911 to 20 November 19111912: 28 March 1912 to 24 November 19121913: 16 February 1913 to 13 December 19131914: 18 February 1914 to 26 September 19141915: 28 January 1915 to 20 November 19151916: 18 February 1916 to 4 November 19161917: 5 February 1917 to 7 October 19171918: 2 April 1918 to 9 September 19181920: 3 February 1920 to 25 September 19201921: 3 February 1921 to 11 October 19211922: 4 February 1922 to 22 September 19221923: 20 May 1923 to 4 October 19231924: 26 February 1924 to 8 November 19241925: 18 January 1925 to 10 November 19251926: 7 January 1926 to 25 September 19261927: 13 January 1927 to 14 November 19271928: 24 January 1928 to 31 December 19281929: 27 January 1929 to 21 December 19291930: 1 June 1930 to 18 October 19301932: 19 July 1932 to 5 November 19321933: 19 January 1933 to 20 October 19331934: 28 January 1934 to 6 November 19341935: 1 July 1935 to 20 September 19351936: 4 June 1936 to 22 October 19361937: 12 February 1937 to 7 October 19371938: 10 May 1938 to 18 September 19381939: 21 February 1939 to 25 September 19391940: 9 January 1940 to 24 September 19401943: 13 January 1943 to 11 September 19431948: 21 June 1948 to 16 September 19481949: 5 February 1949 to 30 October 19491950: 14 June 1950 to 16 September 19501952: 3 June 1952 to 23 September 19521953: 22 June 1953 to 30 September 195319061911191619221927193319381949JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hilsa meeting 10 mm (0.39 in).
First to last qualifying date each year at Hilsa
YearFirst dateLast date
19061906-02-151906-10-01
19071907-02-051907-09-21
19081908-01-121908-09-30
19091909-04-171909-09-30
19101910-06-021910-11-13
19111911-01-271911-11-20
19121912-03-281912-11-24
19131913-02-161913-12-13
19141914-02-181914-09-26
19151915-01-281915-11-20
19161916-02-181916-11-04
19171917-02-051917-10-07
19181918-04-021918-09-09
19201920-02-031920-09-25
19211921-02-031921-10-11
19221922-02-041922-09-22
19231923-05-201923-10-04
19241924-02-261924-11-08
19251925-01-181925-11-10
19261926-01-071926-09-25
19271927-01-131927-11-14
19281928-01-241928-12-31
19291929-01-271929-12-21
19301930-06-011930-10-18
19321932-07-191932-11-05
19331933-01-191933-10-20
19341934-01-281934-11-06
19351935-07-011935-09-20
19361936-06-041936-10-22
19371937-02-121937-10-07
19381938-05-101938-09-18
19391939-02-211939-09-25
19401940-01-091940-09-24
19431943-01-131943-09-11
19481948-06-211948-09-16
19491949-02-051949-10-30
19501950-06-141950-09-16
19521952-06-031952-09-23
19531953-06-221953-09-30

Every Fixed Threshold

Fixed thresholds at Hilsa
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3950191130
25 mm (0.98 in): Days with 25 mm or more rain3923190915
50 mm (1.97 in): Days with 50 mm or more rain361519484
100 mm (3.94 in): Days with 100 mm or more rain19419483

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1906.

Download the Data

  • Data for Hilsa 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).