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Built 2026-10-19 (19 October 2026)

Porto Alegre Threshold Days by Year (BR047787670)

4 fixed thresholds counted per year at Porto Alegre (BR047787670): 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 38 years, most in 1964 with 26.
  • Porto Alegre: days with 25 mm (0.98 in) or more of precipitation in 38 years, most in 1964 with 14.
  • Porto Alegre: days with 50 mm (1.97 in) or more of precipitation in 31 years, most in 1972 with 5.
  • Porto Alegre: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1972 with 2.
  • 4 fixed thresholds have at least one qualifying day at Porto Alegre.
38 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 26 in 1964. 01020301943: 141944: 151945: 191946: 111947: 161948: 171949: 81951: 41952: 71953: 81954: 171955: 121956: 121957: 131958: 131959: 141960: 201961: 51962: 111963: 221964: 261965: 91966: 131967: 161968: 221969: 211970: 221971: 131972: 181975: 121976: 121977: 231978: 211979: 181980: 231981: 81982: 81983: 151943194719521956196019641968197219781982
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 26 in 1964.
Days with 10 mm (0.39 in) or more of precipitation per year at Porto Alegre
YearDaysDecade average
19431414.3
19441514.3
19451914.3
19461114.3
19471614.3
19481714.3
1949814.3
1951411.1
1952711.1
1953811.1
19541711.1
19551211.1
19561211.1
19571311.1
19581311.1
19591411.1
19602016.5
1961516.5
19621116.5
19632216.5
19642616.5
1965916.5
19661316.5
19671616.5
19682216.5
19692116.5
19702217.4
19711317.4
19721817.4
19751217.4
19761217.4
19772317.4
19782117.4
19791817.4
19802313.5
1981813.5
1982813.5
19831513.5
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). 1943: 12 January 1943 to 23 December 19431944: 19 January 1944 to 31 December 19441945: 10 January 1945 to 26 December 19451946: 13 February 1946 to 12 November 19461947: 22 January 1947 to 4 December 19471948: 8 March 1948 to 29 December 19481949: 4 April 1949 to 28 December 19491951: 20 March 1951 to 13 December 19511952: 4 March 1952 to 22 December 19521953: 15 February 1953 to 19 December 19531954: 1 January 1954 to 29 December 19541955: 23 January 1955 to 22 December 19551956: 1 January 1956 to 22 December 19561957: 12 January 1957 to 22 December 19571958: 12 January 1958 to 28 December 19581959: 1 January 1959 to 27 December 19591960: 2 January 1960 to 4 December 19601961: 22 January 1961 to 9 December 19611962: 5 January 1962 to 15 December 19621963: 3 January 1963 to 30 December 19631964: 13 January 1964 to 7 December 19641965: 2 October 1965 to 26 November 19651966: 4 January 1966 to 8 December 19661967: 15 February 1967 to 27 December 19671968: 1 February 1968 to 12 December 19681969: 9 February 1969 to 28 December 19691970: 13 January 1970 to 25 November 19701971: 17 January 1971 to 22 December 19711972: 20 January 1972 to 25 December 19721975: 21 January 1975 to 16 December 19751976: 3 February 1976 to 20 December 19761977: 7 January 1977 to 28 December 19771978: 3 January 1978 to 20 December 19781979: 8 January 1979 to 7 December 19791980: 1 January 1980 to 22 December 19801981: 22 January 1981 to 31 December 19811982: 14 January 1982 to 24 December 19821983: 1 January 1983 to 5 December 198319431948195419591964196919761981JanFebMarAprMayJunJulAugSepOctNovDec
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
19431943-01-121943-12-23
19441944-01-191944-12-31
19451945-01-101945-12-26
19461946-02-131946-11-12
19471947-01-221947-12-04
19481948-03-081948-12-29
19491949-04-041949-12-28
19511951-03-201951-12-13
19521952-03-041952-12-22
19531953-02-151953-12-19
19541954-01-011954-12-29
19551955-01-231955-12-22
19561956-01-011956-12-22
19571957-01-121957-12-22
19581958-01-121958-12-28
19591959-01-011959-12-27
19601960-01-021960-12-04
19611961-01-221961-12-09
19621962-01-051962-12-15
19631963-01-031963-12-30
19641964-01-131964-12-07
19651965-10-021965-11-26
19661966-01-041966-12-08
19671967-02-151967-12-27
19681968-02-011968-12-12
19691969-02-091969-12-28
19701970-01-131970-11-25
19711971-01-171971-12-22
19721972-01-201972-12-25
19751975-01-211975-12-16
19761976-02-031976-12-20
19771977-01-071977-12-28
19781978-01-031978-12-20
19791979-01-081979-12-07
19801980-01-011980-12-22
19811981-01-221981-12-31
19821982-01-141982-12-24
19831983-01-011983-12-05

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 rain3826196415
25 mm (0.98 in): Days with 25 mm or more rain381419646
50 mm (1.97 in): Days with 50 mm or more rain31519723
100 mm (3.94 in): Days with 100 mm or more rain3219722

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1943.

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).