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Built 2026-10-19 (19 October 2026)

Porto Alegre Threshold Days by Year (BR001645007)

4 fixed thresholds counted per year at Porto Alegre (BR001645007): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Porto Alegre Thresholds

  • Porto Alegre: days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 1992 with 49.
  • Porto Alegre: days with 25 mm (0.98 in) or more of precipitation in 33 years, most in 1981 with 25.
  • Porto Alegre: days with 50 mm (1.97 in) or more of precipitation in 30 years, most in 1992 with 6.
  • Porto Alegre: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1961 with 1.
  • 4 fixed thresholds have at least one qualifying day at Porto Alegre.
33 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Porto Alegre Days per year at Porto Alegre with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 1992. 02040601956: 231957: 431959: 241960: 421961: 251962: 301963: 91964: 411965: 421967: 291968: 371969: 301970: 271971: 291972: 381973: 341974: 331975: 351976: 351977: 231978: 371981: 471984: 201986: 331987: 221992: 491993: 291995: 291996: 261997: 231998: 361999: 322000: 33195619611965197019741978198719962000
Days per year at Porto Alegre with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 1992.
Days with 10 mm (0.39 in) or more of precipitation per year at Porto Alegre
YearDaysDecade average
19562330
19574330
19592430
19604231.7
19612531.7
19623031.7
1963931.7
19644131.7
19654231.7
19672931.7
19683731.7
19693031.7
19702732.3
19712932.3
19723832.3
19733432.3
19743332.3
19753532.3
19763532.3
19772332.3
19783732.3
19814730.5
19842030.5
19863330.5
19872230.5
19924932
19932932
19952932
19962632
19972332
19983632
19993232
20003333
First to last qualifying date each year at Porto Alegre For each year, a bar from the first to the last day at Porto Alegre meeting 10 mm (0.39 in). 1956: 1 January 1956 to 26 November 19561957: 1 January 1957 to 25 December 19571959: 1 January 1959 to 30 December 19591960: 1 January 1960 to 22 December 19601961: 3 January 1961 to 29 December 19611962: 13 January 1962 to 29 December 19621963: 8 February 1963 to 22 December 19631964: 2 January 1964 to 31 December 19641965: 2 January 1965 to 23 December 19651967: 17 January 1967 to 30 December 19671968: 1 February 1968 to 20 December 19681969: 17 January 1969 to 31 December 19691970: 11 January 1970 to 18 December 19701971: 17 January 1971 to 23 December 19711972: 18 January 1972 to 24 December 19721973: 16 January 1973 to 29 December 19731974: 1 January 1974 to 27 December 19741975: 4 January 1975 to 17 December 19751976: 27 January 1976 to 23 December 19761977: 1 January 1977 to 25 December 19771978: 4 January 1978 to 30 December 19781981: 1 January 1981 to 30 December 19811984: 8 January 1984 to 28 November 19841986: 2 January 1986 to 31 December 19861987: 1 January 1987 to 30 November 19871992: 3 January 1992 to 28 December 19921993: 20 January 1993 to 27 December 19931995: 4 January 1995 to 31 December 19951996: 2 January 1996 to 31 December 19961997: 1 January 1997 to 30 November 19971998: 9 January 1998 to 24 December 19981999: 1 January 1999 to 25 December 19992000: 1 January 2000 to 30 December 20001956196219681973197819921998JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Porto Alegre meeting 10 mm (0.39 in).
First to last qualifying date each year at Porto Alegre
YearFirst dateLast date
19561956-01-011956-11-26
19571957-01-011957-12-25
19591959-01-011959-12-30
19601960-01-011960-12-22
19611961-01-031961-12-29
19621962-01-131962-12-29
19631963-02-081963-12-22
19641964-01-021964-12-31
19651965-01-021965-12-23
19671967-01-171967-12-30
19681968-02-011968-12-20
19691969-01-171969-12-31
19701970-01-111970-12-18
19711971-01-171971-12-23
19721972-01-181972-12-24
19731973-01-161973-12-29
19741974-01-011974-12-27
19751975-01-041975-12-17
19761976-01-271976-12-23
19771977-01-011977-12-25
19781978-01-041978-12-30
19811981-01-011981-12-30
19841984-01-081984-11-28
19861986-01-021986-12-31
19871987-01-011987-11-30
19921992-01-031992-12-28
19931993-01-201993-12-27
19951995-01-041995-12-31
19961996-01-021996-12-31
19971997-01-011997-11-30
19981998-01-091998-12-24
19991999-01-011999-12-25
20002000-01-012000-12-30

Every Fixed Threshold

Fixed thresholds at Porto Alegre
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3349199233
25 mm (0.98 in): Days with 25 mm or more rain3325198112
50 mm (1.97 in): Days with 50 mm or more rain30619925
100 mm (3.94 in): Days with 100 mm or more rain6119611

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1956.

Download the Data

  • Data for Porto Alegre 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).