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

Iapi Threshold Days by Year (BR037192180)

4 fixed thresholds counted per year at Iapi (BR037192180): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Iapi Thresholds

  • Iapi: days with 10 mm (0.39 in) or more of precipitation in 43 years, most in 1974 with 40.
  • Iapi: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1944 with 15.
  • Iapi: days with 50 mm (1.97 in) or more of precipitation in 33 years, most in 1944 with 5.
  • Iapi: days with 100 mm (3.94 in) or more of precipitation in 5 years, most in 1940 with 1.
  • 4 fixed thresholds have at least one qualifying day at Iapi.
43 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Iapi Days per year at Iapi with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1974. 0102030401934: 171935: 241936: 141937: 161938: 111939: 251940: 301941: 181942: 111943: 221944: 261946: 251949: 151950: 231951: 81952: 81953: 101954: 101955: 121956: 151957: 221958: 71959: 131960: 191961: 231962: 171963: 261964: 311965: 201966: 141967: 291968: 241969: 231970: 101973: 251974: 401975: 221976: 111977: 171978: 141979: 121980: 121982: 10193419391944195219571962196719741979
Days per year at Iapi with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1974.
Days with 10 mm (0.39 in) or more of precipitation per year at Iapi
YearDaysDecade average
19341717.8
19352417.8
19361417.8
19371617.8
19381117.8
19392517.8
19403021
19411821
19421121
19432221
19442621
19462521
19491521
19502312.8
1951812.8
1952812.8
19531012.8
19541012.8
19551212.8
19561512.8
19572212.8
1958712.8
19591312.8
19601922.6
19612322.6
19621722.6
19632622.6
19643122.6
19652022.6
19661422.6
19672922.6
19682422.6
19692322.6
19701018.9
19732518.9
19744018.9
19752218.9
19761118.9
19771718.9
19781418.9
19791218.9
19801211
19821011
First to last qualifying date each year at Iapi For each year, a bar from the first to the last day at Iapi meeting 10 mm (0.39 in). 1934: 3 February 1934 to 15 November 19341935: 4 January 1935 to 7 May 19351936: 1 January 1936 to 17 November 19361937: 19 February 1937 to 27 December 19371938: 26 January 1938 to 25 May 19381939: 31 January 1939 to 7 September 19391940: 26 January 1940 to 13 June 19401941: 9 January 1941 to 1 May 19411942: 10 February 1942 to 5 December 19421943: 24 January 1943 to 27 December 19431944: 18 January 1944 to 30 December 19441946: 2 January 1946 to 21 December 19461949: 9 February 1949 to 22 November 19491950: 12 January 1950 to 17 May 19501951: 9 January 1951 to 15 December 19511952: 7 February 1952 to 15 December 19521953: 16 February 1953 to 26 November 19531954: 7 March 1954 to 24 November 19541955: 21 January 1955 to 24 May 19551956: 2 February 1956 to 21 October 19561957: 14 January 1957 to 24 April 19571958: 15 January 1958 to 12 May 19581959: 20 January 1959 to 29 May 19591960: 2 January 1960 to 15 June 19601961: 18 January 1961 to 27 December 19611962: 21 January 1962 to 16 December 19621963: 14 January 1963 to 27 December 19631964: 1 January 1964 to 28 May 19641965: 18 February 1965 to 5 October 19651966: 6 February 1966 to 26 May 19661967: 26 January 1967 to 29 December 19671968: 29 January 1968 to 28 December 19681969: 21 January 1969 to 19 July 19691970: 20 January 1970 to 10 November 19701973: 11 January 1973 to 2 October 19731974: 15 January 1974 to 29 December 19741975: 20 January 1975 to 31 December 19751976: 3 February 1976 to 4 December 19761977: 21 January 1977 to 30 December 19771978: 14 January 1978 to 9 May 19781979: 23 January 1979 to 19 November 19791980: 3 January 1980 to 21 March 19801982: 26 January 1982 to 19 April 198219341940194919551961196719751982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Iapi meeting 10 mm (0.39 in).
First to last qualifying date each year at Iapi
YearFirst dateLast date
19341934-02-031934-11-15
19351935-01-041935-05-07
19361936-01-011936-11-17
19371937-02-191937-12-27
19381938-01-261938-05-25
19391939-01-311939-09-07
19401940-01-261940-06-13
19411941-01-091941-05-01
19421942-02-101942-12-05
19431943-01-241943-12-27
19441944-01-181944-12-30
19461946-01-021946-12-21
19491949-02-091949-11-22
19501950-01-121950-05-17
19511951-01-091951-12-15
19521952-02-071952-12-15
19531953-02-161953-11-26
19541954-03-071954-11-24
19551955-01-211955-05-24
19561956-02-021956-10-21
19571957-01-141957-04-24
19581958-01-151958-05-12
19591959-01-201959-05-29
19601960-01-021960-06-15
19611961-01-181961-12-27
19621962-01-211962-12-16
19631963-01-141963-12-27
19641964-01-011964-05-28
19651965-02-181965-10-05
19661966-02-061966-05-26
19671967-01-261967-12-29
19681968-01-291968-12-28
19691969-01-211969-07-19
19701970-01-201970-11-10
19731973-01-111973-10-02
19741974-01-151974-12-29
19751975-01-201975-12-31
19761976-02-031976-12-04
19771977-01-211977-12-30
19781978-01-141978-05-09
19791979-01-231979-11-19
19801980-01-031980-03-21
19821982-01-261982-04-19

Every Fixed Threshold

Fixed thresholds at Iapi
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4340197410
25 mm (0.98 in): Days with 25 mm or more rain421519443
50 mm (1.97 in): Days with 50 mm or more rain33519443
100 mm (3.94 in): Days with 100 mm or more rain5119401

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1934.

Download the Data

  • Data for Iapi 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).