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

Coonoor Threshold Days by Year (IN020091800)

5 fixed thresholds counted per year at Coonoor (IN020091800): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Coonoor Thresholds

  • Coonoor: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 1929 with 56.
  • Coonoor: days with 25 mm (0.98 in) or more of precipitation in 32 years, most in 1944 with 29.
  • Coonoor: days with 50 mm (1.97 in) or more of precipitation in 32 years, most in 1960 with 12.
  • Coonoor: days with 100 mm (3.94 in) or more of precipitation in 21 years, most in 1948 with 4.
  • 5 fixed thresholds have at least one qualifying day at Coonoor.
32 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Coonoor Days per year at Coonoor with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 56 in 1929. 02040601929: 561930: 431933: 381934: 371935: 431936: 511937: 441938: 451939: 461940: 421941: 431942: 391943: 461944: 561945: 411946: 501947: 441948: 401949: 321950: 341951: 381952: 281953: 441954: 421955: 321956: 411957: 451958: 391959: 411960: 511967: 301968: 5019291935193919431947195119551959
Days per year at Coonoor with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 56 in 1929.
Days with 10 mm (0.39 in) or more of precipitation per year at Coonoor
YearDaysDecade average
19295656
19304343.4
19333843.4
19343743.4
19354343.4
19365143.4
19374443.4
19384543.4
19394643.4
19404243.3
19414343.3
19423943.3
19434643.3
19445643.3
19454143.3
19465043.3
19474443.3
19484043.3
19493243.3
19503438.4
19513838.4
19522838.4
19534438.4
19544238.4
19553238.4
19564138.4
19574538.4
19583938.4
19594138.4
19605143.7
19673043.7
19685043.7
First to last qualifying date each year at Coonoor For each year, a bar from the first to the last day at Coonoor meeting 10 mm (0.39 in). 1929: 9 January 1929 to 23 December 19291930: 8 January 1930 to 26 December 19301933: 27 January 1933 to 20 November 19331934: 9 January 1934 to 13 December 19341935: 8 January 1935 to 27 December 19351936: 21 January 1936 to 19 December 19361937: 13 January 1937 to 14 December 19371938: 2 February 1938 to 28 December 19381939: 12 January 1939 to 13 December 19391940: 25 February 1940 to 6 December 19401941: 7 January 1941 to 17 December 19411942: 5 April 1942 to 23 December 19421943: 3 January 1943 to 24 December 19431944: 10 January 1944 to 23 December 19441945: 22 January 1945 to 21 November 19451946: 21 January 1946 to 31 December 19461947: 1 January 1947 to 22 December 19471948: 18 January 1948 to 29 December 19481949: 3 April 1949 to 28 November 19491950: 19 February 1950 to 14 December 19501951: 1 January 1951 to 29 November 19511952: 3 January 1952 to 13 December 19521953: 10 January 1953 to 27 December 19531954: 5 January 1954 to 16 December 19541955: 9 January 1955 to 7 December 19551956: 11 January 1956 to 28 December 19561957: 2 February 1957 to 30 December 19571958: 2 January 1958 to 5 December 19581959: 3 February 1959 to 29 December 19591960: 23 January 1960 to 5 December 19601967: 12 January 1967 to 22 December 19671968: 24 January 1968 to 20 December 196819291935193919431947195119551959JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Coonoor meeting 10 mm (0.39 in).
First to last qualifying date each year at Coonoor
YearFirst dateLast date
19291929-01-091929-12-23
19301930-01-081930-12-26
19331933-01-271933-11-20
19341934-01-091934-12-13
19351935-01-081935-12-27
19361936-01-211936-12-19
19371937-01-131937-12-14
19381938-02-021938-12-28
19391939-01-121939-12-13
19401940-02-251940-12-06
19411941-01-071941-12-17
19421942-04-051942-12-23
19431943-01-031943-12-24
19441944-01-101944-12-23
19451945-01-221945-11-21
19461946-01-211946-12-31
19471947-01-011947-12-22
19481948-01-181948-12-29
19491949-04-031949-11-28
19501950-02-191950-12-14
19511951-01-011951-11-29
19521952-01-031952-12-13
19531953-01-101953-12-27
19541954-01-051954-12-16
19551955-01-091955-12-07
19561956-01-111956-12-28
19571957-02-021957-12-30
19581958-01-021958-12-05
19591959-02-031959-12-29
19601960-01-231960-12-05
19671967-01-121967-12-22
19681968-01-241968-12-20

Every Fixed Threshold

Fixed thresholds at Coonoor
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3256192950
25 mm (0.98 in): Days with 25 mm or more rain3229194418
50 mm (1.97 in): Days with 50 mm or more rain321219605
100 mm (3.94 in): Days with 100 mm or more rain21419481
200 mm (7.87 in): Days with 200 mm or more rain2119361

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1929.

Download the Data

  • Data for Coonoor 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).