Daily records
Page built 2026-10-16
Data as of 2025-12-31
Search
Built 2026-10-16 (16 October 2026)

Porto Alegre Weather Records (BR001645007)

Record envelope, standing records and threshold days for Porto Alegre (BR001645007), Brazil, with 48 years of record.

Key Facts for Porto Alegre

  • Porto Alegre (BR001645007) is a weather station in Brazil at -16.91 latitude and -45.38 longitude, 499 m (1,637 ft) above sea level.
  • The station reports from 1953 to 2000, 48 years of record.
  • 0 records set at Porto Alegre still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Porto Alegre set a daily record precipitation of 39.9 mm (1.6 in) on 7 September 2000.

About the Station

  • Location: Brazil, -16.91 latitude, -45.38 longitude.
  • Elevation: 499 m (1,637 ft).
  • Period of record: 1953 to 2000, 48 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Porto Alegre, with 2026 drawn through them The band shows the record high and record low for each calendar day at Porto Alegre. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Porto Alegre. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Porto Alegre, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
Febn/an/an/an/a
Marn/an/an/an/a
Aprn/an/an/an/a
Mayn/an/an/an/a
Junn/an/an/an/a
Juln/an/an/an/a
Augn/an/an/an/a
Sepn/an/an/an/a
Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Porto Alegre by the year they were set 0 records at Porto Alegre still stand. 00000000000
0 records at Porto Alegre still stand.
Standing records at Porto Alegre by the year they were set
Year setStanding records

Wettest Day of Each Month

Jan: 140.8 mm (5.5 in)
Record daily precipitation for each month at Porto Alegre The wettest day on record for each calendar month at Porto Alegre. The most was 140.8 mm (5.5 in) on 3 January 1961. 050100150 Jan: 140.8 mm (5.5 in), 3 January 1961 Jan Feb: 90.0 mm (3.5 in), 2 February 1992 Feb Mar: 135.0 mm (5.3 in), 4 March 1999 Mar Apr: 90.0 mm (3.5 in), 7 April 1984 Apr May: 45.0 mm (1.8 in), 30 May 1981 May Jun: 50.8 mm (2.0 in), 12 June 1956 Jun Jul: 42.0 mm (1.7 in), 11 July 1965 Jul Aug: 34.6 mm (1.4 in), 30 August 2000 Aug Sep: 61.2 mm (2.4 in), 24 September 1985 Sep Oct: 93.2 mm (3.7 in), 6 October 1977 Oct Nov: 128.4 mm (5.1 in), 7 November 1971 Nov Dec: 95.3 mm (3.8 in), 13 December 1961 Dec
The wettest day on record for each calendar month at Porto Alegre. The most was 140.8 mm (5.5 in) on 3 January 1961.
Record daily precipitation for each month at Porto Alegre
MonthRecord daily precipitation (mm)Date
Jan140.8 mm (5.5 in)3 January 1961
Feb90.0 mm (3.5 in)2 February 1992
Mar135.0 mm (5.3 in)4 March 1999
Apr90.0 mm (3.5 in)7 April 1984
May45.0 mm (1.8 in)30 May 1981
Jun50.8 mm (2.0 in)12 June 1956
Jul42.0 mm (1.7 in)11 July 1965
Aug34.6 mm (1.4 in)30 August 2000
Sep61.2 mm (2.4 in)24 September 1985
Oct93.2 mm (3.7 in)6 October 1977
Nov128.4 mm (5.1 in)7 November 1971
Dec95.3 mm (3.8 in)13 December 1961

Latest Records

20
Latest records at Porto Alegre
DateStationRecordValueBeat old record byOld record stoodSignificance
7 September 2000Porto Alegre, BRdaily rain39.9 mm (1.6 in)36.4 mm (1.4 in)8 years40 of 100 (Notable)
4 September 2000Porto Alegre, BRdaily rain13.5 mm (0.5 in)8.5 mm (0.33 in)11 years15 of 100 (Routine)
30 August 2000Porto Alegre, BRmonthly rain34.6 mm (1.4 in)9.6 mm (0.38 in)19 years28 of 100 (Routine)
29 February 2000Porto Alegre, BRdaily rain (Tie)49.9 mm (2.0 in)tie44 years4 of 100 (Routine)
20 January 2000Porto Alegre, BRdaily rain52.8 mm (2.1 in)12.8 mm (0.5 in)32 years20 of 100 (Routine)
2 January 2000Porto Alegre, BRdaily rain55.1 mm (2.2 in)26.4 mm (1.0 in)4 years19 of 100 (Routine)
6 December 1999Porto Alegre, BRdaily rain45.8 mm (1.8 in)8.1 mm (0.32 in)34 years18 of 100 (Routine)
9 November 1999Porto Alegre, BRdaily rain50.0 mm (2.0 in)18.5 mm (0.7 in)8 years15 of 100 (Routine)
8 November 1999Porto Alegre, BRdaily rain26.4 mm (1.0 in)7.8 mm (0.31 in)28 years16 of 100 (Routine)
16 September 1999Porto Alegre, BRdaily rain21.2 mm (0.8 in)17.2 mm (0.7 in)22 years20 of 100 (Routine)
17 March 1999Porto Alegre, BRdaily rain39.3 mm (1.5 in)19.3 mm (0.8 in)33 years25 of 100 (Routine)
5 March 1999Porto Alegre, BRdaily rain72.5 mm (2.9 in)30.3 mm (1.2 in)42 years34 of 100 (Routine)
4 March 1999Porto Alegre, BRmonthly rain135.0 mm (5.3 in)35.0 mm (1.4 in)2 years35 of 100 (Notable)
28 February 1999Porto Alegre, BRdaily rain57.6 mm (2.3 in)32.6 mm (1.3 in)1 year24 of 100 (Routine)
22 February 1999Porto Alegre, BRdaily rain43.6 mm (1.7 in)0.2 mm (0.01 in)43 years16 of 100 (Routine)
27 January 1999Porto Alegre, BRdaily rain86.0 mm (3.4 in)19.7 mm (0.8 in)35 years25 of 100 (Routine)
1 January 1999Porto Alegre, BRdaily rain66.5 mm (2.6 in)30.5 mm (1.2 in)17 years26 of 100 (Routine)
2 December 1998Porto Alegre, BRdaily rain72.0 mm (2.8 in)20.9 mm (0.8 in)28 years24 of 100 (Routine)
8 October 1998Porto Alegre, BRdaily rain13.3 mm (0.5 in)0.9 mm (0.04 in)40 years16 of 100 (Routine)
29 April 1998Porto Alegre, BRdaily rain13.1 mm (0.5 in)3.1 mm (0.12 in)21 years12 of 100 (Routine)

Extremes by Year

1953 to 2000
Yearly extremes at Porto Alegre: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)140.8 mm (5.5 in)196175.8 mm (3.0 in)47
Wettest five days (Rx5day)278.0 mm (10.9 in)1992146.2 mm (5.8 in)47
Longest dry spell (CDD)198 days1963103 days47

Wettest day (Rx1day)

Wettest day (Rx1day) at Porto Alegre by year The wettest day of the year at Porto Alegre, 1953 to 2000. The record is 140.8 mm (5.5 in) in 1961, marked on the chart; the median year is 75.8 mm (3.0 in). 05010015019601970198019902000Record: 140.8 mm (5.5 in) in 1961
The wettest day of the year at Porto Alegre, 1953 to 2000. The record is 140.8 mm (5.5 in) in 1961, marked on the chart; the median year is 75.8 mm (3.0 in).
Wettest day (Rx1day) at Porto Alegre by year
YearWettest day (Rx1day)
195364.4 mm (2.5 in)
195446.0 mm (1.8 in)
195562.0 mm (2.4 in)
195675.8 mm (3.0 in)
195766.5 mm (2.6 in)
195889.0 mm (3.5 in)
195958.9 mm (2.3 in)
196058.7 mm (2.3 in)
1961140.8 mm (5.5 in)
196248.0 mm (1.9 in)
196380.5 mm (3.2 in)
196466.3 mm (2.6 in)
1965105.8 mm (4.2 in)
196777.2 mm (3.0 in)
196864.3 mm (2.5 in)
196951.1 mm (2.0 in)
197037.2 mm (1.5 in)
1971128.4 mm (5.1 in)
197277.0 mm (3.0 in)
197373.2 mm (2.9 in)
197466.0 mm (2.6 in)
197574.2 mm (2.9 in)
197676.0 mm (3.0 in)
197793.2 mm (3.7 in)
197870.0 mm (2.8 in)
197988.0 mm (3.5 in)
198078.0 mm (3.1 in)
198189.0 mm (3.5 in)
198250.0 mm (2.0 in)
198375.0 mm (3.0 in)
198490.0 mm (3.5 in)
198561.2 mm (2.4 in)
1986132.3 mm (5.2 in)
198789.0 mm (3.5 in)
198861.7 mm (2.4 in)
19897.9 mm (0.31 in)
199079.0 mm (3.1 in)
1991106.7 mm (4.2 in)
199290.0 mm (3.5 in)
199343.2 mm (1.7 in)
199480.0 mm (3.1 in)
199584.3 mm (3.3 in)
199677.7 mm (3.1 in)
1997100.0 mm (3.9 in)
199872.0 mm (2.8 in)
1999135.0 mm (5.3 in)
200074.1 mm (2.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Porto Alegre by year The wettest five days of the year at Porto Alegre, 1953 to 2000. The record is 278.0 mm (10.9 in) in 1992, marked on the chart; the median year is 146.2 mm (5.8 in). 010020030019601970198019902000Record: 278.0 mm (10.9 in) in 1992
The wettest five days of the year at Porto Alegre, 1953 to 2000. The record is 278.0 mm (10.9 in) in 1992, marked on the chart; the median year is 146.2 mm (5.8 in).
Wettest five days (Rx5day) at Porto Alegre by year
YearWettest five days (Rx5day)
1953168.2 mm (6.6 in)
195490.0 mm (3.5 in)
1955161.2 mm (6.3 in)
1956146.9 mm (5.8 in)
1957177.2 mm (7.0 in)
1958131.8 mm (5.2 in)
1959137.1 mm (5.4 in)
1960112.4 mm (4.4 in)
1961197.5 mm (7.8 in)
1962130.0 mm (5.1 in)
196384.8 mm (3.3 in)
1964165.2 mm (6.5 in)
1965230.5 mm (9.1 in)
1967175.2 mm (6.9 in)
1968198.2 mm (7.8 in)
1969110.9 mm (4.4 in)
197079.2 mm (3.1 in)
1971162.8 mm (6.4 in)
1972134.0 mm (5.3 in)
1973139.4 mm (5.5 in)
1974112.8 mm (4.4 in)
1975135.0 mm (5.3 in)
1976152.4 mm (6.0 in)
1977149.8 mm (5.9 in)
1978136.8 mm (5.4 in)
1979149.6 mm (5.9 in)
1980128.6 mm (5.1 in)
1981166.0 mm (6.5 in)
198296.0 mm (3.8 in)
1983175.0 mm (6.9 in)
1984138.8 mm (5.5 in)
1985121.7 mm (4.8 in)
1986150.5 mm (5.9 in)
1987160.8 mm (6.3 in)
198861.7 mm (2.4 in)
198912.9 mm (0.5 in)
199087.3 mm (3.4 in)
1991168.2 mm (6.6 in)
1992278.0 mm (10.9 in)
199396.5 mm (3.8 in)
1994180.4 mm (7.1 in)
1995173.8 mm (6.8 in)
1996105.1 mm (4.1 in)
1997197.0 mm (7.8 in)
1998146.2 mm (5.8 in)
1999268.8 mm (10.6 in)
2000141.4 mm (5.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Porto Alegre by year The longest dry spell of the year at Porto Alegre, 1953 to 2000. The record is 198 days in 1963, marked on the chart; the median year is 103 days. 05010015020019601970198019902000Record: 198 days in 1963
The longest dry spell of the year at Porto Alegre, 1953 to 2000. The record is 198 days in 1963, marked on the chart; the median year is 103 days.
Longest dry spell (CDD) at Porto Alegre by year
YearLongest dry spell (CDD)
195318 days
195492 days
195538 days
1956139 days
1957145 days
195842 days
195976 days
1960169 days
196173 days
1962120 days
1963198 days
196475 days
196556 days
1967150 days
196886 days
1969138 days
1970133 days
1971155 days
197260 days
197391 days
1974130 days
197577 days
197651 days
1977109 days
197847 days
197976 days
198080 days
198147 days
1982117 days
198354 days
1984140 days
1985121 days
198637 days
1987118 days
1988153 days
198943 days
199057 days
1991145 days
1992166 days
1993101 days
1994103 days
1995140 days
1996117 days
199791 days
1998129 days
1999182 days
2000130 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

33 years, 1956 to 2000

A day with at least 76.6 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 161.0 mm (6.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Porto Alegre: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years76.6 mm (3.0 in)
5 years99.2 mm (3.9 in)
10 years114.2 mm (4.5 in)
25 years133.1 mm (5.2 in)
50 years147.1 mm (5.8 in)Longer than the 33 years of record
100 years161.0 mm (6.3 in)Longer than the 33 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 33 years of values from 1956 to 2000.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 140.8 mm (5.5 in) in 1961; 135.0 mm (5.3 in) in 1999; 132.3 mm (5.2 in) in 1986.

Download the Data

  • Data for Porto Alegre standing records by year: CSV or JSON. Field meanings are on the data page.
  • 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).