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

Porto Weather Records (BR027748570)

Record envelope, standing records and threshold days for Porto (BR027748570), Brazil, with 60 years of record.

Key Facts for Porto

  • Porto (BR027748570) is a weather station in Brazil at -3.90 latitude and -42.72 longitude, 32 m (105 ft) above sea level.
  • The station reports from 1924 to 1983, 60 years of record.
  • 0 records set at Porto still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Porto set a daily record precipitation of 45.8 mm (1.8 in) on 28 December 1983.

About the Station

  • Location: Brazil, -3.90 latitude, -42.72 longitude.
  • Elevation: 32 m (105 ft).
  • Period of record: 1924 to 1983, 60 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Porto, with 2026 drawn through them The band shows the record high and record low for each calendar day at Porto. 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. 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, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

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

All-Time Record Progression

3 new records
When Porto set new all-time records 3 all-time records were set at Porto between 28 January 1960 and 15 December 1977. Each dot is a new record. Record daily precipitation28 January 1960: Record daily precipitation 96.4 mm (3.8 in)13 March 1960: Record daily precipitation 150.0 mm (5.9 in)15 December 1977: Record daily precipitation 218.4 mm (8.6 in)1960196519701975
3 all-time records were set at Porto between 28 January 1960 and 15 December 1977. Each dot is a new record.
When Porto set new all-time records
DateKindDetail
1960-01-28Record daily precipitationRecord daily precipitation 96.4 mm (3.8 in)
1960-03-13Record daily precipitationRecord daily precipitation 150.0 mm (5.9 in)
1977-12-15Record daily precipitationRecord daily precipitation 218.4 mm (8.6 in)

Wettest Day of Each Month

Dec: 218.4 mm (8.6 in)
Record daily precipitation for each month at Porto The wettest day on record for each calendar month at Porto. The most was 218.4 mm (8.6 in) on 15 December 1977. 0100200300 Jan: 138.4 mm (5.4 in), 27 January 1976 Jan Feb: 120.4 mm (4.7 in), 21 February 1977 Feb Mar: 150.0 mm (5.9 in), 13 March 1960 Mar Apr: 101.8 mm (4.0 in), 6 April 1971 Apr May: 110.5 mm (4.4 in), 9 May 1977 May Jun: 65.4 mm (2.6 in), 11 June 1959 Jun Jul: 70.3 mm (2.8 in), 25 July 1960 Jul Aug: 35.3 mm (1.4 in), 28 August 1932 Aug Sep: 50.0 mm (2.0 in), 30 September 1976 Sep Oct: 58.8 mm (2.3 in), 23 October 1955 Oct Nov: 81.2 mm (3.2 in), 25 November 1968 Nov Dec: 218.4 mm (8.6 in), 15 December 1977 Dec
The wettest day on record for each calendar month at Porto. The most was 218.4 mm (8.6 in) on 15 December 1977.
Record daily precipitation for each month at Porto
MonthRecord daily precipitation (mm)Date
Jan138.4 mm (5.4 in)27 January 1976
Feb120.4 mm (4.7 in)21 February 1977
Mar150.0 mm (5.9 in)13 March 1960
Apr101.8 mm (4.0 in)6 April 1971
May110.5 mm (4.4 in)9 May 1977
Jun65.4 mm (2.6 in)11 June 1959
Jul70.3 mm (2.8 in)25 July 1960
Aug35.3 mm (1.4 in)28 August 1932
Sep50.0 mm (2.0 in)30 September 1976
Oct58.8 mm (2.3 in)23 October 1955
Nov81.2 mm (3.2 in)25 November 1968
Dec218.4 mm (8.6 in)15 December 1977

Latest Records

20
Latest records at Porto
DateStationRecordValueBeat old record byOld record stoodSignificance
28 December 1983Porto, BRdaily rain45.8 mm (1.8 in)20.4 mm (0.8 in)8 years17 of 100 (Routine)
17 August 1983Porto, BRdaily rain3.6 mm (0.14 in)1.1 mm (0.04 in)34 years17 of 100 (Routine)
7 February 1983Porto, BRdaily rain73.8 mm (2.9 in)24.2 mm (1.0 in)20 years24 of 100 (Routine)
5 August 1982Porto, BRdaily rain3.5 mm (0.14 in)0.3 mm (0.01 in)13 years9 of 100 (Routine)
26 February 1982Porto, BRdaily rain96.9 mm (3.8 in)44.6 mm (1.8 in)10 years31 of 100 (Routine)
6 January 1982Porto, BRdaily rain64.2 mm (2.5 in)31.8 mm (1.3 in)28 years29 of 100 (Routine)
4 January 1982Porto, BRdaily rain51.6 mm (2.0 in)2.9 mm (0.11 in)22 years12 of 100 (Routine)
21 December 1981Porto, BRdaily rain75.6 mm (3.0 in)1.0 mm (0.04 in)19 years10 of 100 (Routine)
30 May 1981Porto, BRdaily rain62.2 mm (2.4 in)19.4 mm (0.8 in)16 years21 of 100 (Routine)
16 March 1981Porto, BRdaily rain72.6 mm (2.9 in)21.1 mm (0.8 in)0 years16 of 100 (Routine)
2 February 1981Porto, BRdaily rain66.8 mm (2.6 in)15.6 mm (0.6 in)14 years17 of 100 (Routine)
26 January 1981Porto, BRdaily rain85.6 mm (3.4 in)12.4 mm (0.5 in)13 years14 of 100 (Routine)
29 December 1980Porto, BRdaily rain31.9 mm (1.3 in)0.7 mm (0.03 in)55 years21 of 100 (Routine)
25 October 1980Porto, BRdaily rain1.1 mm (0.04 in)1.1 mm (0.04 in)56 years20 of 100 (Routine)
25 September 1980Porto, BRdaily rain23.1 mm (0.9 in)12.5 mm (0.5 in)41 years20 of 100 (Routine)
5 April 1980Porto, BRdaily rain80.6 mm (3.2 in)2.2 mm (0.09 in)14 years10 of 100 (Routine)
16 March 1980Porto, BRdaily rain51.5 mm (2.0 in)4.7 mm (0.19 in)21 years13 of 100 (Routine)
29 February 1980Porto, BRdaily rain62.9 mm (2.5 in)52.4 mm (2.1 in)20 years39 of 100 (Notable)
5 January 1980Porto, BRdaily rain28.3 mm (1.1 in)1.3 mm (0.05 in)41 years17 of 100 (Routine)
29 November 1979Porto, BRdaily rain11.2 mm (0.4 in)4.4 mm (0.17 in)22 years13 of 100 (Routine)

Extremes by Year

1924 to 1983
Yearly extremes at Porto: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)218.4 mm (8.6 in)197773.5 mm (2.9 in)58
Wettest five days (Rx5day)285.6 mm (11.2 in)1977168.6 mm (6.6 in)58
Longest dry spell (CDD)191 days198170 days58

Wettest day (Rx1day)

Wettest day (Rx1day) at Porto by year The wettest day of the year at Porto, 1924 to 1983. The record is 218.4 mm (8.6 in) in 1977, marked on the chart; the median year is 73.5 mm (2.9 in). 050100150200250193019401950196019701980Record: 218.4 mm (8.6 in) in 1977
The wettest day of the year at Porto, 1924 to 1983. The record is 218.4 mm (8.6 in) in 1977, marked on the chart; the median year is 73.5 mm (2.9 in).
Wettest day (Rx1day) at Porto by year
YearWettest day (Rx1day)
192473.7 mm (2.9 in)
192573.7 mm (2.9 in)
192666.2 mm (2.6 in)
192774.1 mm (2.9 in)
192861.8 mm (2.4 in)
192973.7 mm (2.9 in)
193066.2 mm (2.6 in)
193168.6 mm (2.7 in)
193278.6 mm (3.1 in)
193375.6 mm (3.0 in)
193465.5 mm (2.6 in)
193772.2 mm (2.8 in)
193866.0 mm (2.6 in)
193962.2 mm (2.4 in)
194037.5 mm (1.5 in)
194150.3 mm (2.0 in)
194247.8 mm (1.9 in)
194328.4 mm (1.1 in)
194456.0 mm (2.2 in)
194536.3 mm (1.4 in)
194630.5 mm (1.2 in)
194731.2 mm (1.2 in)
194838.0 mm (1.5 in)
194958.9 mm (2.3 in)
195081.4 mm (3.2 in)
195175.5 mm (3.0 in)
195270.6 mm (2.8 in)
195365.4 mm (2.6 in)
195468.8 mm (2.7 in)
195575.7 mm (3.0 in)
195668.8 mm (2.7 in)
195764.6 mm (2.5 in)
195858.8 mm (2.3 in)
195965.4 mm (2.6 in)
1960150.0 mm (5.9 in)
196190.2 mm (3.6 in)
196289.6 mm (3.5 in)
1963127.6 mm (5.0 in)
196484.4 mm (3.3 in)
196570.8 mm (2.8 in)
1966122.1 mm (4.8 in)
196771.0 mm (2.8 in)
196881.2 mm (3.2 in)
1969115.2 mm (4.5 in)
1970113.1 mm (4.5 in)
1971101.8 mm (4.0 in)
197268.6 mm (2.7 in)
197373.2 mm (2.9 in)
197488.9 mm (3.5 in)
1975117.5 mm (4.6 in)
1976138.4 mm (5.4 in)
1977218.4 mm (8.6 in)
197881.8 mm (3.2 in)
197975.8 mm (3.0 in)
198090.9 mm (3.6 in)
198185.6 mm (3.4 in)
198296.9 mm (3.8 in)
198373.8 mm (2.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Porto by year The wettest five days of the year at Porto, 1924 to 1983. The record is 285.6 mm (11.2 in) in 1977, marked on the chart; the median year is 168.6 mm (6.6 in). 0100200300193019401950196019701980Record: 285.6 mm (11.2 in) in 1977
The wettest five days of the year at Porto, 1924 to 1983. The record is 285.6 mm (11.2 in) in 1977, marked on the chart; the median year is 168.6 mm (6.6 in).
Wettest five days (Rx5day) at Porto by year
YearWettest five days (Rx5day)
1924254.2 mm (10.0 in)
1925168.6 mm (6.6 in)
1926127.4 mm (5.0 in)
1927177.3 mm (7.0 in)
1928138.9 mm (5.5 in)
1929167.4 mm (6.6 in)
1930180.7 mm (7.1 in)
1931139.9 mm (5.5 in)
1932146.3 mm (5.8 in)
1933178.5 mm (7.0 in)
1934187.8 mm (7.4 in)
1937168.6 mm (6.6 in)
1938171.0 mm (6.7 in)
1939180.7 mm (7.1 in)
194092.0 mm (3.6 in)
1941129.6 mm (5.1 in)
194292.6 mm (3.6 in)
194373.4 mm (2.9 in)
194493.9 mm (3.7 in)
1945125.0 mm (4.9 in)
1946103.8 mm (4.1 in)
1947116.2 mm (4.6 in)
1948138.6 mm (5.5 in)
1949167.2 mm (6.6 in)
1950197.0 mm (7.8 in)
1951102.1 mm (4.0 in)
1952225.4 mm (8.9 in)
1953152.2 mm (6.0 in)
1954159.5 mm (6.3 in)
1955178.1 mm (7.0 in)
1956244.5 mm (9.6 in)
1957190.0 mm (7.5 in)
1958123.4 mm (4.9 in)
1959217.7 mm (8.6 in)
1960205.5 mm (8.1 in)
1961195.5 mm (7.7 in)
1962232.2 mm (9.1 in)
1963208.3 mm (8.2 in)
1964219.2 mm (8.6 in)
1965147.4 mm (5.8 in)
1966226.9 mm (8.9 in)
1967187.8 mm (7.4 in)
1968191.1 mm (7.5 in)
1969230.1 mm (9.1 in)
1970227.4 mm (9.0 in)
1971138.5 mm (5.5 in)
1972151.1 mm (5.9 in)
1973151.4 mm (6.0 in)
1974215.2 mm (8.5 in)
1975215.3 mm (8.5 in)
1976166.2 mm (6.5 in)
1977285.6 mm (11.2 in)
1978148.5 mm (5.8 in)
1979183.5 mm (7.2 in)
1980221.0 mm (8.7 in)
1981140.2 mm (5.5 in)
1982154.6 mm (6.1 in)
1983128.3 mm (5.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Porto by year The longest dry spell of the year at Porto, 1924 to 1983. The record is 191 days in 1981, marked on the chart; the median year is 70 days. 050100150200193019401950196019701980Record: 191 days in 1981
The longest dry spell of the year at Porto, 1924 to 1983. The record is 191 days in 1981, marked on the chart; the median year is 70 days.
Longest dry spell (CDD) at Porto by year
YearLongest dry spell (CDD)
192478 days
192549 days
192698 days
192750 days
192887 days
192930 days
193059 days
193176 days
193270 days
193358 days
193436 days
193769 days
193883 days
193931 days
194085 days
1941104 days
194267 days
194334 days
194467 days
194549 days
194663 days
194751 days
194859 days
194964 days
195068 days
1951100 days
195284 days
1953147 days
1954146 days
195586 days
195668 days
195780 days
1958131 days
1959123 days
1960113 days
1961165 days
1962129 days
196355 days
196494 days
196596 days
196680 days
196742 days
196897 days
1969159 days
197071 days
197139 days
197294 days
197337 days
197440 days
19759 days
197662 days
1977135 days
197837 days
197936 days
198046 days
1981191 days
1982142 days
198360 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

55 years, 1925 to 1983

A day with at least 71.3 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 179.2 mm (7.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Porto: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years71.3 mm (2.8 in)
5 years96.8 mm (3.8 in)
10 years115.0 mm (4.5 in)
25 years139.5 mm (5.5 in)
50 years158.9 mm (6.3 in)
100 years179.2 mm (7.1 in)Longer than the 55 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, 55 years of values from 1925 to 1983.

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: 218.4 mm (8.6 in) in 1977; 150.0 mm (5.9 in) in 1960; 138.4 mm (5.4 in) in 1976.

Download the Data

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

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