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Built 2026-10-15 (15 October 2026)

Atchafalaya Weather Records (USC00160367)

Record envelope, standing records and threshold days for Atchafalaya (USC00160367), Louisiana, United States, with 39 years of record.

Key Facts for Atchafalaya

  • Atchafalaya (USC00160367) is a weather station in Louisiana, United States at 30.35 latitude and -91.72 longitude, 9 m (30 ft) above sea level.
  • The station reports from 1931 to 1969, 39 years of record.
  • 0 records set at Atchafalaya still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Atchafalaya set a daily record precipitation of 56.9 mm (2.2 in) on 11 July 1969.

About the Station

  • Location: Louisiana, United States, 30.35 latitude, -91.72 longitude.
  • Elevation: 9 m (30 ft).
  • Period of record: 1931 to 1969, 39 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

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

Wettest Day of Each Month

Mar: 245.1 mm (9.6 in)
Record daily precipitation for each month at Atchafalaya The wettest day on record for each calendar month at Atchafalaya. The most was 245.1 mm (9.6 in) on 12 March 1947. 0100200300 Jan: 191.8 mm (7.6 in), 1 January 1942 Jan Feb: 77.5 mm (3.1 in), 2 February 1959 Feb Mar: 245.1 mm (9.6 in), 12 March 1947 Mar Apr: 148.6 mm (5.9 in), 25 April 1953 Apr May: 167.6 mm (6.6 in), 20 May 1955 May Jun: 101.6 mm (4.0 in), 18 June 1951 Jun Jul: 142.2 mm (5.6 in), 5 July 1946 Jul Aug: 203.2 mm (8.0 in), 9 August 1940 Aug Sep: 128.0 mm (5.0 in), 14 September 1961 Sep Oct: 104.9 mm (4.1 in), 1 October 1962 Oct Nov: 139.7 mm (5.5 in), 19 November 1932 Nov Dec: 104.1 mm (4.1 in), 31 December 1933 Dec
The wettest day on record for each calendar month at Atchafalaya. The most was 245.1 mm (9.6 in) on 12 March 1947.
Record daily precipitation for each month at Atchafalaya
MonthRecord daily precipitation (mm)Date
Jan191.8 mm (7.6 in)1 January 1942
Feb77.5 mm (3.1 in)2 February 1959
Mar245.1 mm (9.6 in)12 March 1947
Apr148.6 mm (5.9 in)25 April 1953
May167.6 mm (6.6 in)20 May 1955
Jun101.6 mm (4.0 in)18 June 1951
Jul142.2 mm (5.6 in)5 July 1946
Aug203.2 mm (8.0 in)9 August 1940
Sep128.0 mm (5.0 in)14 September 1961
Oct104.9 mm (4.1 in)1 October 1962
Nov139.7 mm (5.5 in)19 November 1932
Dec104.1 mm (4.1 in)31 December 1933

Latest Records

20
Latest records at Atchafalaya
DateStationRecordValueBeat old record byOld record stoodSignificance
11 July 1969Atchafalaya, USdaily rain56.9 mm (2.2 in)25.1 mm (1.0 in)16 years19 of 100 (Routine)
9 May 1969Atchafalaya, USdaily rain (Tie)2.5 mm (0.10 in)tie0 years0 of 100 (Routine)
8 May 1969Atchafalaya, USdaily rain36.3 mm (1.4 in)29.9 mm (1.2 in)27 years22 of 100 (Routine)
13 April 1969Atchafalaya, USdaily rain143.5 mm (5.6 in)103.9 mm (4.1 in)14 years47 of 100 (Notable)
1 December 1968Atchafalaya, USdaily rain62.7 mm (2.5 in)50.0 mm (2.0 in)29 years38 of 100 (Notable)
4 September 1968Atchafalaya, USdaily rain31.0 mm (1.2 in)18.3 mm (0.7 in)17 years16 of 100 (Routine)
23 August 1968Atchafalaya, USdaily rain44.2 mm (1.7 in)11.9 mm (0.5 in)3 years8 of 100 (Routine)
13 August 1968Atchafalaya, USdaily rain49.0 mm (1.9 in)12.9 mm (0.5 in)10 years12 of 100 (Routine)
9 May 1968Atchafalaya, USdaily rain2.5 mm (0.10 in)1.7 mm (0.07 in)7 years5 of 100 (Routine)
29 February 1968Atchafalaya, USdaily rain23.4 mm (0.9 in)23.4 mm (0.9 in)36 years20 of 100 (Routine)
28 December 1967Atchafalaya, USdaily rain27.9 mm (1.1 in)1.2 mm (0.05 in)24 years10 of 100 (Routine)
10 December 1967Atchafalaya, USdaily rain63.8 mm (2.5 in)6.6 mm (0.26 in)16 years10 of 100 (Routine)
17 October 1967Atchafalaya, USdaily rain12.2 mm (0.5 in)1.5 mm (0.06 in)25 years10 of 100 (Routine)
15 September 1967Atchafalaya, USdaily rain10.4 mm (0.4 in)4.3 mm (0.17 in)25 years11 of 100 (Routine)
7 September 1967Atchafalaya, USdaily rain39.6 mm (1.6 in)24.4 mm (1.0 in)1 year13 of 100 (Routine)
20 August 1967Atchafalaya, USdaily rain25.1 mm (1.0 in)7.1 mm (0.28 in)0 years6 of 100 (Routine)
14 July 1967Atchafalaya, USdaily rain48.3 mm (1.9 in)4.4 mm (0.17 in)13 years9 of 100 (Routine)
1 June 1967Atchafalaya, USdaily rain36.3 mm (1.4 in)8.9 mm (0.35 in)4 years8 of 100 (Routine)
22 May 1967Atchafalaya, USdaily rain51.3 mm (2.0 in)19.5 mm (0.8 in)22 years16 of 100 (Routine)
5 May 1967Atchafalaya, USdaily rain41.1 mm (1.6 in)3.8 mm (0.15 in)36 years14 of 100 (Routine)

Extremes by Year

1931 to 1969
Yearly extremes at Atchafalaya: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)245.1 mm (9.6 in)1947102.6 mm (4.0 in)39
Wettest five days (Rx5day)290.1 mm (11.4 in)1940130.1 mm (5.1 in)39
Longest dry spell (CDD)63 days195228 days39

Wettest day (Rx1day)

Wettest day (Rx1day) at Atchafalaya by year The wettest day of the year at Atchafalaya, 1931 to 1969. The record is 245.1 mm (9.6 in) in 1947, marked on the chart; the median year is 102.6 mm (4.0 in). 50100150200250194019501960Record: 245.1 mm (9.6 in) in 1947
The wettest day of the year at Atchafalaya, 1931 to 1969. The record is 245.1 mm (9.6 in) in 1947, marked on the chart; the median year is 102.6 mm (4.0 in).
Wettest day (Rx1day) at Atchafalaya by year
YearWettest day (Rx1day)
1931100.3 mm (3.9 in)
1932139.7 mm (5.5 in)
1933104.1 mm (4.1 in)
1934101.3 mm (4.0 in)
1935132.1 mm (5.2 in)
193668.6 mm (2.7 in)
1937106.9 mm (4.2 in)
193864.8 mm (2.6 in)
193953.3 mm (2.1 in)
1940203.2 mm (8.0 in)
194163.5 mm (2.5 in)
1942191.8 mm (7.6 in)
1943105.4 mm (4.1 in)
194464.8 mm (2.6 in)
1945121.9 mm (4.8 in)
1946142.2 mm (5.6 in)
1947245.1 mm (9.6 in)
194858.4 mm (2.3 in)
1949102.6 mm (4.0 in)
195063.5 mm (2.5 in)
1951101.6 mm (4.0 in)
195289.7 mm (3.5 in)
1953148.6 mm (5.9 in)
195498.3 mm (3.9 in)
1955167.6 mm (6.6 in)
1956103.6 mm (4.1 in)
195772.6 mm (2.9 in)
195853.3 mm (2.1 in)
195977.5 mm (3.1 in)
196051.8 mm (2.0 in)
1961128.0 mm (5.0 in)
1962104.9 mm (4.1 in)
196362.0 mm (2.4 in)
1964123.7 mm (4.9 in)
1965104.1 mm (4.1 in)
1966103.1 mm (4.1 in)
196763.8 mm (2.5 in)
196862.7 mm (2.5 in)
1969143.5 mm (5.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Atchafalaya by year The wettest five days of the year at Atchafalaya, 1931 to 1969. The record is 290.1 mm (11.4 in) in 1940, marked on the chart; the median year is 130.1 mm (5.1 in). 0100200300194019501960Record: 290.1 mm (11.4 in) in 1940
The wettest five days of the year at Atchafalaya, 1931 to 1969. The record is 290.1 mm (11.4 in) in 1940, marked on the chart; the median year is 130.1 mm (5.1 in).
Wettest five days (Rx5day) at Atchafalaya by year
YearWettest five days (Rx5day)
1931135.9 mm (5.4 in)
1932165.3 mm (6.5 in)
1933105.4 mm (4.1 in)
1934131.3 mm (5.2 in)
1935152.9 mm (6.0 in)
1936110.3 mm (4.3 in)
1937125.3 mm (4.9 in)
193887.3 mm (3.4 in)
193986.1 mm (3.4 in)
1940290.1 mm (11.4 in)
1941150.3 mm (5.9 in)
1942227.0 mm (8.9 in)
1943228.6 mm (9.0 in)
194486.4 mm (3.4 in)
1945122.7 mm (4.8 in)
1946269.7 mm (10.6 in)
1947250.2 mm (9.9 in)
194888.9 mm (3.5 in)
1949152.4 mm (6.0 in)
1950114.3 mm (4.5 in)
1951127.0 mm (5.0 in)
1952156.3 mm (6.2 in)
1953256.8 mm (10.1 in)
195498.3 mm (3.9 in)
1955245.1 mm (9.6 in)
1956155.4 mm (6.1 in)
1957122.9 mm (4.8 in)
1958117.4 mm (4.6 in)
1959190.5 mm (7.5 in)
196078.0 mm (3.1 in)
1961215.4 mm (8.5 in)
1962104.9 mm (4.1 in)
1963130.1 mm (5.1 in)
1964126.5 mm (5.0 in)
1965123.4 mm (4.9 in)
1966133.8 mm (5.3 in)
196789.1 mm (3.5 in)
196887.6 mm (3.4 in)
1969158.5 mm (6.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Atchafalaya by year The longest dry spell of the year at Atchafalaya, 1931 to 1969. The record is 63 days in 1952, marked on the chart; the median year is 28 days. 020406080194019501960Record: 63 days in 1952
The longest dry spell of the year at Atchafalaya, 1931 to 1969. The record is 63 days in 1952, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Atchafalaya by year
YearLongest dry spell (CDD)
193133 days
193243 days
193327 days
193416 days
193543 days
193633 days
193733 days
193832 days
193939 days
194025 days
194118 days
194235 days
194322 days
194426 days
194526 days
194622 days
194741 days
194825 days
194935 days
195012 days
195126 days
195263 days
195356 days
195434 days
195545 days
195632 days
195727 days
195829 days
195927 days
196021 days
196126 days
196218 days
196343 days
196425 days
196529 days
196623 days
196728 days
196826 days
196931 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

30 years, 1931 to 1968

A day with at least 97.3 mm (3.8 in) of rain is expected about once in 2 years. A day with at least 274.2 mm (10.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Atchafalaya: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years97.3 mm (3.8 in)
5 years137.5 mm (5.4 in)
10 years166.8 mm (6.6 in)
25 years207.1 mm (8.2 in)
50 years239.6 mm (9.4 in)Longer than the 30 years of record
100 years274.2 mm (10.8 in)Longer than the 30 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, 30 years of values from 1931 to 1968.

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: 245.1 mm (9.6 in) in 1947; 203.2 mm (8.0 in) in 1940; 191.8 mm (7.6 in) in 1942.

Download the Data

  • Data for Atchafalaya standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Atchafalaya 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

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