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Data as of 2025-12-31
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Built 2026-10-17 (17 October 2026)

Arachu Weather Records (BR027597790)

Record envelope, standing records and threshold days for Arachu (BR027597790), Brazil, with 61 years of record.

Key Facts for Arachu

  • Arachu (BR027597790) is a weather station in Brazil at -2.88 latitude and -40.13 longitude, 16 m (52 ft) above sea level.
  • The station reports from 1912 to 1972, 61 years of record.
  • 0 records set at Arachu still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Arachu set a daily record precipitation of 0.2 mm (0.01 in) on 6 December 1971.

About the Station

  • Location: Brazil, -2.88 latitude, -40.13 longitude.
  • Elevation: 16 m (52 ft).
  • Period of record: 1912 to 1972, 61 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

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

Wettest Day of Each Month

May: 170.0 mm (6.7 in)
Record daily precipitation for each month at Arachu The wettest day on record for each calendar month at Arachu. The most was 170.0 mm (6.7 in) on 19 May 1912. 050100150200 Jan: 98.4 mm (3.9 in), 26 January 1955 Jan Feb: 101.2 mm (4.0 in), 22 February 1953 Feb Mar: 108.7 mm (4.3 in), 9 March 1920 Mar Apr: 137.8 mm (5.4 in), 11 April 1961 Apr May: 170.0 mm (6.7 in), 19 May 1912 May Jun: 65.0 mm (2.6 in), 27 June 1912 Jun Jul: 73.6 mm (2.9 in), 10 July 1930 Jul Aug: 22.0 mm (0.9 in), 6 August 1914 Aug Sep: 20.0 mm (0.8 in), 11 September 1914 Sep Oct: 16.6 mm (0.7 in), 4 October 1965 Oct Nov: 39.4 mm (1.6 in), 28 November 1963 Nov Dec: 131.2 mm (5.2 in), 26 December 1963 Dec
The wettest day on record for each calendar month at Arachu. The most was 170.0 mm (6.7 in) on 19 May 1912.
Record daily precipitation for each month at Arachu
MonthRecord daily precipitation (mm)Date
Jan98.4 mm (3.9 in)26 January 1955
Feb101.2 mm (4.0 in)22 February 1953
Mar108.7 mm (4.3 in)9 March 1920
Apr137.8 mm (5.4 in)11 April 1961
May170.0 mm (6.7 in)19 May 1912
Jun65.0 mm (2.6 in)27 June 1912
Jul73.6 mm (2.9 in)10 July 1930
Aug22.0 mm (0.9 in)6 August 1914
Sep20.0 mm (0.8 in)11 September 1914
Oct16.6 mm (0.7 in)4 October 1965
Nov39.4 mm (1.6 in)28 November 1963
Dec131.2 mm (5.2 in)26 December 1963

Latest Records

20
Latest records at Arachu
DateStationRecordValueBeat old record byOld record stoodSignificance
6 December 1971Arachu, BRdaily rain0.2 mm (0.01 in)0.2 mm (0.01 in)58 years20 of 100 (Routine)
25 November 1971Arachu, BRdaily rain (Tie)0.4 mm (0.02 in)tie2 years1 of 100 (Routine)
24 November 1971Arachu, BRdaily rain4.1 mm (0.16 in)1.5 mm (0.06 in)12 years11 of 100 (Routine)
10 November 1971Arachu, BRdaily rain0.2 mm (0.01 in)0.2 mm (0.01 in)58 years20 of 100 (Routine)
16 October 1971Arachu, BRdaily rain0.2 mm (0.01 in)0.2 mm (0.01 in)58 years20 of 100 (Routine)
1 October 1971Arachu, BRdaily rain0.4 mm (0.02 in)0.4 mm (0.02 in)58 years20 of 100 (Routine)
10 September 1971Arachu, BRdaily rain1.2 mm (0.05 in)0.3 mm (0.01 in)48 years20 of 100 (Routine)
27 August 1971Arachu, BRdaily rain3.2 mm (0.13 in)2.2 mm (0.09 in)48 years20 of 100 (Routine)
19 July 1971Arachu, BRdaily rain5.2 mm (0.20 in)0.3 mm (0.01 in)1 year6 of 100 (Routine)
16 July 1971Arachu, BRdaily rain10.7 mm (0.4 in)1.1 mm (0.04 in)48 years20 of 100 (Routine)
7 June 1971Arachu, BRdaily rain31.3 mm (1.2 in)13.3 mm (0.5 in)58 years35 of 100 (Notable)
25 December 1970Arachu, BRdaily rain3.7 mm (0.15 in)0.3 mm (0.01 in)48 years19 of 100 (Routine)
21 November 1970Arachu, BRdaily rain2.8 mm (0.11 in)0.4 mm (0.02 in)1 year5 of 100 (Routine)
9 November 1970Arachu, BRdaily rain19.8 mm (0.8 in)17.2 mm (0.7 in)49 years20 of 100 (Routine)
8 November 1970Arachu, BRdaily rain15.2 mm (0.6 in)15.2 mm (0.6 in)57 years20 of 100 (Routine)
9 October 1970Arachu, BRdaily rain3.8 mm (0.15 in)3.7 mm (0.15 in)48 years20 of 100 (Routine)
3 October 1970Arachu, BRdaily rain0.4 mm (0.02 in)0.4 mm (0.02 in)57 years20 of 100 (Routine)
25 September 1970Arachu, BRdaily rain0.8 mm (0.03 in)0.3 mm (0.01 in)48 years20 of 100 (Routine)
28 June 1970Arachu, BRdaily rain19.2 mm (0.8 in)5.6 mm (0.22 in)21 years16 of 100 (Routine)
26 October 1969Arachu, BRdaily rain2.8 mm (0.11 in)1.5 mm (0.06 in)47 years20 of 100 (Routine)

Extremes by Year

1912 to 1972
Yearly extremes at Arachu: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)170.0 mm (6.7 in)191271.1 mm (2.8 in)44
Wettest five days (Rx5day)439.0 mm (17.3 in)1912139.2 mm (5.5 in)44
Longest dry spell (CDD)206 days195395 days44

Wettest day (Rx1day)

Wettest day (Rx1day) at Arachu by year The wettest day of the year at Arachu, 1912 to 1972. The record is 170.0 mm (6.7 in) in 1912, marked on the chart; the median year is 71.1 mm (2.8 in). 050100150200192019301940195019601970Record: 170.0 mm (6.7 in) in 1912
The wettest day of the year at Arachu, 1912 to 1972. The record is 170.0 mm (6.7 in) in 1912, marked on the chart; the median year is 71.1 mm (2.8 in).
Wettest day (Rx1day) at Arachu by year
YearWettest day (Rx1day)
1912170.0 mm (6.7 in)
191368.0 mm (2.7 in)
191470.0 mm (2.8 in)
191544.0 mm (1.7 in)
191680.0 mm (3.1 in)
191770.0 mm (2.8 in)
191862.3 mm (2.5 in)
191967.3 mm (2.6 in)
1920108.7 mm (4.3 in)
192170.0 mm (2.8 in)
192288.3 mm (3.5 in)
192354.3 mm (2.1 in)
192484.0 mm (3.3 in)
192547.5 mm (1.9 in)
192660.5 mm (2.4 in)
192772.2 mm (2.8 in)
192850.5 mm (2.0 in)
192954.5 mm (2.1 in)
193073.6 mm (2.9 in)
194878.2 mm (3.1 in)
194998.0 mm (3.9 in)
195062.6 mm (2.5 in)
195142.7 mm (1.7 in)
195237.6 mm (1.5 in)
1953101.2 mm (4.0 in)
195441.8 mm (1.6 in)
195598.4 mm (3.9 in)
195652.4 mm (2.1 in)
195788.6 mm (3.5 in)
195856.7 mm (2.2 in)
195978.3 mm (3.1 in)
196095.8 mm (3.8 in)
1961137.8 mm (5.4 in)
196281.4 mm (3.2 in)
1963131.2 mm (5.2 in)
196492.8 mm (3.7 in)
196592.2 mm (3.6 in)
196675.5 mm (3.0 in)
1967106.4 mm (4.2 in)
196867.2 mm (2.6 in)
196993.8 mm (3.7 in)
197035.8 mm (1.4 in)
197131.3 mm (1.2 in)
19720.2 mm (0.01 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Arachu by year The wettest five days of the year at Arachu, 1912 to 1972. The record is 439.0 mm (17.3 in) in 1912, marked on the chart; the median year is 139.2 mm (5.5 in). 0200400600192019301940195019601970Record: 439.0 mm (17.3 in) in 1912
The wettest five days of the year at Arachu, 1912 to 1972. The record is 439.0 mm (17.3 in) in 1912, marked on the chart; the median year is 139.2 mm (5.5 in).
Wettest five days (Rx5day) at Arachu by year
YearWettest five days (Rx5day)
1912439.0 mm (17.3 in)
1913172.8 mm (6.8 in)
1914125.7 mm (4.9 in)
191560.2 mm (2.4 in)
1916171.8 mm (6.8 in)
1917149.3 mm (5.9 in)
191899.6 mm (3.9 in)
191985.5 mm (3.4 in)
1920268.4 mm (10.6 in)
1921115.9 mm (4.6 in)
1922126.3 mm (5.0 in)
1923133.8 mm (5.3 in)
1924205.7 mm (8.1 in)
1925201.5 mm (7.9 in)
1926170.0 mm (6.7 in)
1927131.8 mm (5.2 in)
1928103.0 mm (4.1 in)
1929138.0 mm (5.4 in)
193092.5 mm (3.6 in)
1948203.8 mm (8.0 in)
1949182.5 mm (7.2 in)
195096.2 mm (3.8 in)
195179.2 mm (3.1 in)
195296.5 mm (3.8 in)
1953123.5 mm (4.9 in)
195464.4 mm (2.5 in)
1955151.4 mm (6.0 in)
1956104.4 mm (4.1 in)
1957206.6 mm (8.1 in)
1958105.6 mm (4.2 in)
1959193.9 mm (7.6 in)
1960222.7 mm (8.8 in)
1961274.5 mm (10.8 in)
1962157.8 mm (6.2 in)
1963179.3 mm (7.1 in)
1964203.5 mm (8.0 in)
1965182.6 mm (7.2 in)
1966140.4 mm (5.5 in)
1967187.5 mm (7.4 in)
1968109.0 mm (4.3 in)
1969168.2 mm (6.6 in)
197077.8 mm (3.1 in)
197132.0 mm (1.3 in)
19720.2 mm (0.01 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Arachu by year The longest dry spell of the year at Arachu, 1912 to 1972. The record is 206 days in 1953, marked on the chart; the median year is 95 days. 050100150200250192019301940195019601970Record: 206 days in 1953
The longest dry spell of the year at Arachu, 1912 to 1972. The record is 206 days in 1953, marked on the chart; the median year is 95 days.
Longest dry spell (CDD) at Arachu by year
YearLongest dry spell (CDD)
191294 days
191333 days
191449 days
191595 days
1916146 days
1917142 days
1918121 days
1919122 days
192082 days
192192 days
192223 days
1923126 days
1924124 days
1925121 days
1926147 days
1927158 days
1928175 days
1929184 days
1930173 days
194861 days
194985 days
195095 days
195176 days
1952119 days
1953206 days
1954141 days
195555 days
1956173 days
195743 days
1958116 days
195937 days
196024 days
196121 days
196259 days
1963106 days
196496 days
196587 days
196676 days
196763 days
1968110 days
196966 days
197064 days
197152 days
197231 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

35 years, 1912 to 1970

A day with at least 70.1 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 160.3 mm (6.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Arachu: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years70.1 mm (2.8 in)
5 years93.7 mm (3.7 in)
10 years109.5 mm (4.3 in)
25 years129.8 mm (5.1 in)
50 years145.0 mm (5.7 in)Longer than the 35 years of record
100 years160.3 mm (6.3 in)Longer than the 35 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, 35 years of values from 1912 to 1970.

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: 170.0 mm (6.7 in) in 1912; 131.2 mm (5.2 in) in 1963; 108.7 mm (4.3 in) in 1920.

Download the Data

  • Data for Arachu standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Arachu 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

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