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Built 2026-10-19 (19 October 2026)

Jaso Threshold Days by Year (IN011340400)

5 fixed thresholds counted per year at Jaso (IN011340400): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Jaso Thresholds

  • Jaso: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1942 with 45.
  • Jaso: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1951 with 21.
  • Jaso: days with 50 mm (1.97 in) or more of precipitation in 41 years, most in 1919 with 8.
  • Jaso: days with 100 mm (3.94 in) or more of precipitation in 23 years, most in 1919 with 3.
  • 5 fixed thresholds have at least one qualifying day at Jaso.
42 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Jaso Days per year at Jaso with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 45 in 1942. 02040601918: 181919: 391920: 181921: 261922: 341923: 351930: 361931: 301932: 261933: 291934: 351935: 311936: 341937: 291938: 361939: 271940: 271941: 231942: 451943: 351944: 251945: 351946: 311947: 351948: 341949: 301951: 341952: 301953: 271954: 211955: 361956: 311957: 251958: 311959: 381960: 321961: 331962: 281963: 321964: 311965: 211966: 22191819231934193919441949195519601965
Days per year at Jaso with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 45 in 1942.
Days with 10 mm (0.39 in) or more of precipitation per year at Jaso
YearDaysDecade average
19181828.5
19193928.5
19201828.3
19212628.3
19223428.3
19233528.3
19303631.3
19313031.3
19322631.3
19332931.3
19343531.3
19353131.3
19363431.3
19372931.3
19383631.3
19392731.3
19402732
19412332
19424532
19433532
19442532
19453532
19463132
19473532
19483432
19493032
19513430.3
19523030.3
19532730.3
19542130.3
19553630.3
19563130.3
19572530.3
19583130.3
19593830.3
19603228.4
19613328.4
19622828.4
19633228.4
19643128.4
19652128.4
19662228.4
First to last qualifying date each year at Jaso For each year, a bar from the first to the last day at Jaso meeting 10 mm (0.39 in). 1918: 7 June 1918 to 30 November 19181919: 18 January 1919 to 4 October 19191920: 4 July 1920 to 11 September 19201921: 21 January 1921 to 14 September 19211922: 11 January 1922 to 13 November 19221923: 11 February 1923 to 4 December 19231930: 31 January 1930 to 28 December 19301931: 30 January 1931 to 15 October 19311932: 19 February 1932 to 23 October 19321933: 22 April 1933 to 20 October 19331934: 28 January 1934 to 5 November 19341935: 3 February 1935 to 10 December 19351936: 22 January 1936 to 11 November 19361937: 17 February 1937 to 5 October 19371938: 24 January 1938 to 11 October 19381939: 24 January 1939 to 11 September 19391940: 10 March 1940 to 22 September 19401941: 16 January 1941 to 18 September 19411942: 15 January 1942 to 23 December 19421943: 7 January 1943 to 19 October 19431944: 18 February 1944 to 3 November 19441945: 4 January 1945 to 21 October 19451946: 24 February 1946 to 13 December 19461947: 4 January 1947 to 19 September 19471948: 4 January 1948 to 26 November 19481949: 18 May 1949 to 30 October 19491951: 15 January 1951 to 15 October 19511952: 23 May 1952 to 14 September 19521953: 30 June 1953 to 29 September 19531954: 10 January 1954 to 23 September 19541955: 23 January 1955 to 3 October 19551956: 28 January 1956 to 1 November 19561957: 18 January 1957 to 11 September 19571958: 29 January 1958 to 12 October 19581959: 18 January 1959 to 20 October 19591960: 1 January 1960 to 3 October 19601961: 29 January 1961 to 17 December 19611962: 25 January 1962 to 24 September 19621963: 16 January 1963 to 15 September 19631964: 30 June 1964 to 3 October 19641965: 1 April 1965 to 13 December 19651966: 18 June 1966 to 1 December 19661918193019361942194819551961JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Jaso meeting 10 mm (0.39 in).
First to last qualifying date each year at Jaso
YearFirst dateLast date
19181918-06-071918-11-30
19191919-01-181919-10-04
19201920-07-041920-09-11
19211921-01-211921-09-14
19221922-01-111922-11-13
19231923-02-111923-12-04
19301930-01-311930-12-28
19311931-01-301931-10-15
19321932-02-191932-10-23
19331933-04-221933-10-20
19341934-01-281934-11-05
19351935-02-031935-12-10
19361936-01-221936-11-11
19371937-02-171937-10-05
19381938-01-241938-10-11
19391939-01-241939-09-11
19401940-03-101940-09-22
19411941-01-161941-09-18
19421942-01-151942-12-23
19431943-01-071943-10-19
19441944-02-181944-11-03
19451945-01-041945-10-21
19461946-02-241946-12-13
19471947-01-041947-09-19
19481948-01-041948-11-26
19491949-05-181949-10-30
19511951-01-151951-10-15
19521952-05-231952-09-14
19531953-06-301953-09-29
19541954-01-101954-09-23
19551955-01-231955-10-03
19561956-01-281956-11-01
19571957-01-181957-09-11
19581958-01-291958-10-12
19591959-01-181959-10-20
19601960-01-011960-10-03
19611961-01-291961-12-17
19621962-01-251962-09-24
19631963-01-161963-09-15
19641964-06-301964-10-03
19651965-04-011965-12-13
19661966-06-181966-12-01

Every Fixed Threshold

Fixed thresholds at Jaso
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4245194222
25 mm (0.98 in): Days with 25 mm or more rain4221195111
50 mm (1.97 in): Days with 50 mm or more rain41819193
100 mm (3.94 in): Days with 100 mm or more rain23319191
200 mm (7.87 in): Days with 200 mm or more rain2119341

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1918.

Download the Data

  • Data for Jaso 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).