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Built 2026-10-19 (19 October 2026)

Acude Riachao Weather Records (BR028821880)

Record envelope, standing records and threshold days for Acude Riachao (BR028821880), Brazil, with 63 years of record.

Key Facts for Acude Riachao

  • Acude Riachao (BR028821880) is a weather station in Brazil at -4.07 latitude and -38.57 longitude, 60 m (197 ft) above sea level.
  • The station reports from 1920 to 1982, 63 years of record.
  • 0 records set at Acude Riachao still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Acude Riachao set a daily record precipitation of 22.7 mm (0.9 in) on 13 July 1982.

About the Station

  • Location: Brazil, -4.07 latitude, -38.57 longitude.
  • Elevation: 60 m (197 ft).
  • Period of record: 1920 to 1982, 63 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Acude Riachao, with 2026 drawn through them The band shows the record high and record low for each calendar day at Acude Riachao. 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 Acude Riachao. 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 Acude Riachao, 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 Acude Riachao by the year they were set 0 records at Acude Riachao still stand. 00000000000
0 records at Acude Riachao still stand.
Standing records at Acude Riachao by the year they were set
Year setStanding records

Wettest Day of Each Month

Apr: 200.0 mm (7.9 in)
Record daily precipitation for each month at Acude Riachao The wettest day on record for each calendar month at Acude Riachao. The most was 200.0 mm (7.9 in) on 26 April 1938. 050100150200 Jan: 93.6 mm (3.7 in), 24 January 1924 Jan Feb: 132.0 mm (5.2 in), 26 February 1939 Feb Mar: 121.0 mm (4.8 in), 1 March 1957 Mar Apr: 200.0 mm (7.9 in), 26 April 1938 Apr May: 100.0 mm (3.9 in), 22 May 1936 May Jun: 72.0 mm (2.8 in), 13 June 1937 Jun Jul: 77.2 mm (3.0 in), 5 July 1977 Jul Aug: 36.2 mm (1.4 in), 2 August 1974 Aug Sep: 42.2 mm (1.7 in), 6 September 1979 Sep Oct: 48.0 mm (1.9 in), 20 October 1939 Oct Nov: 50.4 mm (2.0 in), 17 November 1921 Nov Dec: 57.6 mm (2.3 in), 27 December 1963 Dec
The wettest day on record for each calendar month at Acude Riachao. The most was 200.0 mm (7.9 in) on 26 April 1938.
Record daily precipitation for each month at Acude Riachao
MonthRecord daily precipitation (mm)Date
Jan93.6 mm (3.7 in)24 January 1924
Feb132.0 mm (5.2 in)26 February 1939
Mar121.0 mm (4.8 in)1 March 1957
Apr200.0 mm (7.9 in)26 April 1938
May100.0 mm (3.9 in)22 May 1936
Jun72.0 mm (2.8 in)13 June 1937
Jul77.2 mm (3.0 in)5 July 1977
Aug36.2 mm (1.4 in)2 August 1974
Sep42.2 mm (1.7 in)6 September 1979
Oct48.0 mm (1.9 in)20 October 1939
Nov50.4 mm (2.0 in)17 November 1921
Dec57.6 mm (2.3 in)27 December 1963

Latest Records

20
Latest records at Acude Riachao
DateStationRecordValueBeat old record byOld record stoodSignificance
13 July 1982Acude Riachao, BRdaily rain22.7 mm (0.9 in)2.4 mm (0.09 in)9 years10 of 100 (Routine)
12 May 1982Acude Riachao, BRdaily rain31.4 mm (1.2 in)11.9 mm (0.5 in)9 years16 of 100 (Routine)
24 December 1981Acude Riachao, BRdaily rain28.2 mm (1.1 in)14.0 mm (0.6 in)24 years29 of 100 (Routine)
21 December 1981Acude Riachao, BRdaily rain36.3 mm (1.4 in)34.8 mm (1.4 in)47 years60 of 100 (Major)
18 August 1981Acude Riachao, BRdaily rain3.2 mm (0.13 in)1.8 mm (0.07 in)24 years16 of 100 (Routine)
21 March 1981Acude Riachao, BRdaily rain68.3 mm (2.7 in)5.7 mm (0.22 in)60 years27 of 100 (Routine)
17 March 1981Acude Riachao, BRdaily rain55.7 mm (2.2 in)18.3 mm (0.7 in)26 years24 of 100 (Routine)
5 November 1980Acude Riachao, BRdaily rain8.3 mm (0.33 in)7.5 mm (0.30 in)46 years20 of 100 (Routine)
2 November 1980Acude Riachao, BRdaily rain6.2 mm (0.24 in)0.7 mm (0.03 in)42 years19 of 100 (Routine)
26 October 1980Acude Riachao, BRdaily rain7.2 mm (0.28 in)4.0 mm (0.16 in)3 years12 of 100 (Routine)
3 September 1980Acude Riachao, BRdaily rain5.1 mm (0.20 in)2.8 mm (0.11 in)2 years10 of 100 (Routine)
2 September 1980Acude Riachao, BRdaily rain10.2 mm (0.4 in)7.2 mm (0.28 in)18 years20 of 100 (Routine)
25 May 1980Acude Riachao, BRdaily rain31.1 mm (1.2 in)8.1 mm (0.32 in)31 years20 of 100 (Routine)
29 February 1980Acude Riachao, BRdaily rain12.6 mm (0.5 in)2.3 mm (0.09 in)8 years9 of 100 (Routine)
22 February 1980Acude Riachao, BRdaily rain86.2 mm (3.4 in)23.7 mm (0.9 in)45 years33 of 100 (Routine)
18 February 1980Acude Riachao, BRdaily rain46.2 mm (1.8 in)25.6 mm (1.0 in)4 years22 of 100 (Routine)
18 January 1980Acude Riachao, BRdaily rain22.6 mm (0.9 in)8.6 mm (0.34 in)5 years13 of 100 (Routine)
14 January 1980Acude Riachao, BRdaily rain39.5 mm (1.6 in)22.6 mm (0.9 in)5 years25 of 100 (Routine)
6 September 1979Acude Riachao, BRmonthly rain42.2 mm (1.7 in)10.9 mm (0.4 in)57 years56 of 100 (Notable)
5 September 1979Acude Riachao, BRdaily rain15.1 mm (0.6 in)10.3 mm (0.4 in)57 years20 of 100 (Routine)

Extremes by Year

1920 to 1982
Yearly extremes at Acude Riachao: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)200.0 mm (7.9 in)193868.6 mm (2.7 in)57
Wettest five days (Rx5day)247.8 mm (9.8 in)1938131.3 mm (5.2 in)57
Longest dry spell (CDD)199 days195459 days57

Wettest day (Rx1day)

Wettest day (Rx1day) at Acude Riachao by year The wettest day of the year at Acude Riachao, 1920 to 1982. The record is 200.0 mm (7.9 in) in 1938, marked on the chart; the median year is 68.6 mm (2.7 in). 0501001502001920194019601980Record: 200.0 mm (7.9 in) in 1938
The wettest day of the year at Acude Riachao, 1920 to 1982. The record is 200.0 mm (7.9 in) in 1938, marked on the chart; the median year is 68.6 mm (2.7 in).
Wettest day (Rx1day) at Acude Riachao by year
YearWettest day (Rx1day)
192027.5 mm (1.1 in)
192180.5 mm (3.2 in)
192268.3 mm (2.7 in)
192361.7 mm (2.4 in)
192493.6 mm (3.7 in)
192568.6 mm (2.7 in)
192666.1 mm (2.6 in)
192767.7 mm (2.7 in)
192873.2 mm (2.9 in)
192963.5 mm (2.5 in)
193064.8 mm (2.6 in)
193164.0 mm (2.5 in)
193285.7 mm (3.4 in)
193395.3 mm (3.8 in)
193475.5 mm (3.0 in)
193562.5 mm (2.5 in)
1936100.0 mm (3.9 in)
1937135.0 mm (5.3 in)
1938200.0 mm (7.9 in)
1939132.0 mm (5.2 in)
194076.4 mm (3.0 in)
194138.5 mm (1.5 in)
194854.0 mm (2.1 in)
194992.0 mm (3.6 in)
195076.0 mm (3.0 in)
195158.0 mm (2.3 in)
1952105.0 mm (4.1 in)
195340.0 mm (1.6 in)
195437.4 mm (1.5 in)
195578.0 mm (3.1 in)
195657.0 mm (2.2 in)
1957121.0 mm (4.8 in)
195861.2 mm (2.4 in)
195976.5 mm (3.0 in)
196063.1 mm (2.5 in)
196191.0 mm (3.6 in)
1962104.0 mm (4.1 in)
196387.6 mm (3.4 in)
196465.4 mm (2.6 in)
196563.6 mm (2.5 in)
196663.2 mm (2.5 in)
196786.2 mm (3.4 in)
196893.9 mm (3.7 in)
196963.4 mm (2.5 in)
197055.8 mm (2.2 in)
197168.7 mm (2.7 in)
197248.8 mm (1.9 in)
197387.2 mm (3.4 in)
197479.3 mm (3.1 in)
197572.5 mm (2.9 in)
197661.2 mm (2.4 in)
197777.2 mm (3.0 in)
197855.5 mm (2.2 in)
197958.2 mm (2.3 in)
198086.2 mm (3.4 in)
198168.3 mm (2.7 in)
198251.6 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Acude Riachao by year The wettest five days of the year at Acude Riachao, 1920 to 1982. The record is 247.8 mm (9.8 in) in 1938, marked on the chart; the median year is 131.3 mm (5.2 in). 01002003001920194019601980Record: 247.8 mm (9.8 in) in 1938
The wettest five days of the year at Acude Riachao, 1920 to 1982. The record is 247.8 mm (9.8 in) in 1938, marked on the chart; the median year is 131.3 mm (5.2 in).
Wettest five days (Rx5day) at Acude Riachao by year
YearWettest five days (Rx5day)
192042.0 mm (1.7 in)
1921157.4 mm (6.2 in)
1922182.0 mm (7.2 in)
1923111.1 mm (4.4 in)
1924155.0 mm (6.1 in)
1925136.9 mm (5.4 in)
1926144.8 mm (5.7 in)
1927175.5 mm (6.9 in)
1928130.3 mm (5.1 in)
192999.5 mm (3.9 in)
193081.3 mm (3.2 in)
1931117.4 mm (4.6 in)
1932174.0 mm (6.9 in)
1933193.4 mm (7.6 in)
1934142.9 mm (5.6 in)
1935141.8 mm (5.6 in)
1936115.2 mm (4.5 in)
1937184.0 mm (7.2 in)
1938247.8 mm (9.8 in)
1939213.0 mm (8.4 in)
1940169.7 mm (6.7 in)
194172.5 mm (2.9 in)
1948111.0 mm (4.4 in)
1949157.0 mm (6.2 in)
1950154.0 mm (6.1 in)
195186.0 mm (3.4 in)
1952187.8 mm (7.4 in)
195396.0 mm (3.8 in)
195486.1 mm (3.4 in)
1955106.2 mm (4.2 in)
1956109.7 mm (4.3 in)
1957189.9 mm (7.5 in)
195866.7 mm (2.6 in)
1959117.8 mm (4.6 in)
1960128.7 mm (5.1 in)
1961148.7 mm (5.9 in)
1962226.3 mm (8.9 in)
1963214.2 mm (8.4 in)
1964155.9 mm (6.1 in)
1965121.2 mm (4.8 in)
196675.3 mm (3.0 in)
1967150.8 mm (5.9 in)
1968131.3 mm (5.2 in)
1969126.9 mm (5.0 in)
197087.8 mm (3.5 in)
1971169.4 mm (6.7 in)
1972112.6 mm (4.4 in)
1973176.2 mm (6.9 in)
1974168.7 mm (6.6 in)
1975126.6 mm (5.0 in)
1976109.9 mm (4.3 in)
1977127.7 mm (5.0 in)
1978102.0 mm (4.0 in)
1979118.9 mm (4.7 in)
1980240.0 mm (9.4 in)
1981158.3 mm (6.2 in)
1982118.2 mm (4.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Acude Riachao by year The longest dry spell of the year at Acude Riachao, 1920 to 1982. The record is 199 days in 1954, marked on the chart; the median year is 59 days. 0501001502001920194019601980Record: 199 days in 1954
The longest dry spell of the year at Acude Riachao, 1920 to 1982. The record is 199 days in 1954, marked on the chart; the median year is 59 days.
Longest dry spell (CDD) at Acude Riachao by year
YearLongest dry spell (CDD)
19209 days
192147 days
192296 days
192338 days
192466 days
192559 days
192678 days
192740 days
192870 days
192939 days
193084 days
193139 days
193267 days
1933130 days
193479 days
193556 days
193664 days
193733 days
193853 days
193935 days
194054 days
194147 days
194873 days
194973 days
1950114 days
195195 days
1952136 days
1953133 days
1954199 days
1955121 days
195639 days
1957110 days
1958140 days
195984 days
196076 days
196167 days
196265 days
1963137 days
196446 days
196562 days
196643 days
196784 days
196874 days
196938 days
1970101 days
197142 days
197237 days
197331 days
197428 days
197548 days
197634 days
197722 days
197825 days
197937 days
198037 days
198132 days
198212 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, 1921 to 1981

A day with at least 71.0 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 170.5 mm (6.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Acude Riachao: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years71.0 mm (2.8 in)
5 years92.1 mm (3.6 in)
10 years108.0 mm (4.3 in)
25 years130.7 mm (5.1 in)
50 years149.7 mm (5.9 in)
100 years170.5 mm (6.7 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 1921 to 1981.

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: 200.0 mm (7.9 in) in 1938; 135.0 mm (5.3 in) in 1937; 132.0 mm (5.2 in) in 1939.

Download the Data

  • Data for Acude Riachao standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Acude Riachao 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).