Daily records
Page built 2026-10-18
Data as of 2025-12-31
Search
Built 2026-10-18 (18 October 2026)

New Orleans Jefferson Weather Records (USC00166671)

Record envelope, standing records and threshold days for New Orleans Jefferson (USC00166671), Louisiana, United States, with 33 years of record.

Key Facts for New Orleans Jefferson

  • New Orleans Jefferson (USC00166671) is a weather station in Louisiana, United States at 29.93 latitude and -90.10 longitude, 0 m (0 ft) above sea level.
  • The station reports from 1946 to 1978, 33 years of record.
  • 0 records set at New Orleans Jefferson still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • New Orleans Jefferson set a daily record precipitation of 49.8 mm (2.0 in) on 27 June 1978.

About the Station

  • Location: Louisiana, United States, 29.93 latitude, -90.10 longitude.
  • Elevation: 0 m (0 ft).
  • Period of record: 1946 to 1978, 33 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

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

Wettest Day of Each Month

Mar: 243.1 mm (9.6 in)
Record daily precipitation for each month at New Orleans Jefferson The wettest day on record for each calendar month at New Orleans Jefferson. The most was 243.1 mm (9.6 in) on 5 March 1948. 0100200300 Jan: 138.4 mm (5.4 in), 22 January 1965 Jan Feb: 167.6 mm (6.6 in), 6 February 1967 Feb Mar: 243.1 mm (9.6 in), 5 March 1948 Mar Apr: 153.2 mm (6.0 in), 25 April 1953 Apr May: 216.4 mm (8.5 in), 3 May 1978 May Jun: 86.4 mm (3.4 in), 23 June 1975 Jun Jul: 115.3 mm (4.5 in), 27 July 1955 Jul Aug: 89.4 mm (3.5 in), 30 August 1957 Aug Sep: 121.7 mm (4.8 in), 4 September 1948 Sep Oct: 80.5 mm (3.2 in), 30 October 1967 Oct Nov: 135.4 mm (5.3 in), 19 November 1953 Nov Dec: 100.8 mm (4.0 in), 30 December 1952 Dec
The wettest day on record for each calendar month at New Orleans Jefferson. The most was 243.1 mm (9.6 in) on 5 March 1948.
Record daily precipitation for each month at New Orleans Jefferson
MonthRecord daily precipitation (mm)Date
Jan138.4 mm (5.4 in)22 January 1965
Feb167.6 mm (6.6 in)6 February 1967
Mar243.1 mm (9.6 in)5 March 1948
Apr153.2 mm (6.0 in)25 April 1953
May216.4 mm (8.5 in)3 May 1978
Jun86.4 mm (3.4 in)23 June 1975
Jul115.3 mm (4.5 in)27 July 1955
Aug89.4 mm (3.5 in)30 August 1957
Sep121.7 mm (4.8 in)4 September 1948
Oct80.5 mm (3.2 in)30 October 1967
Nov135.4 mm (5.3 in)19 November 1953
Dec100.8 mm (4.0 in)30 December 1952

Latest Records

20
Latest records at New Orleans Jefferson
DateStationRecordValueBeat old record byOld record stoodSignificance
27 June 1978New Orleans Jefferson, USdaily rain49.8 mm (2.0 in)15.5 mm (0.6 in)24 years18 of 100 (Routine)
11 June 1978New Orleans Jefferson, USdaily rain56.4 mm (2.2 in)4.8 mm (0.19 in)3 years5 of 100 (Routine)
2 June 1978New Orleans Jefferson, USdaily rain56.6 mm (2.2 in)10.6 mm (0.4 in)20 years15 of 100 (Routine)
9 May 1978New Orleans Jefferson, USdaily rain4.8 mm (0.19 in)2.0 mm (0.08 in)16 years8 of 100 (Routine)
4 May 1978New Orleans Jefferson, USdaily rain55.1 mm (2.2 in)35.3 mm (1.4 in)11 years22 of 100 (Routine)
3 May 1978New Orleans Jefferson, USmonthly rain216.4 mm (8.5 in)102.9 mm (4.1 in)18 years58 of 100 (Notable)
8 March 1978New Orleans Jefferson, USdaily rain32.0 mm (1.3 in)0.2 mm (0.01 in)20 years9 of 100 (Routine)
25 January 1978New Orleans Jefferson, USdaily rain105.7 mm (4.2 in)28.2 mm (1.1 in)4 years20 of 100 (Routine)
24 January 1978New Orleans Jefferson, USdaily rain26.9 mm (1.1 in)11.9 mm (0.5 in)16 years14 of 100 (Routine)
19 January 1978New Orleans Jefferson, USdaily rain48.8 mm (1.9 in)6.9 mm (0.27 in)31 years16 of 100 (Routine)
29 December 1977New Orleans Jefferson, USdaily rain66.8 mm (2.6 in)33.8 mm (1.3 in)2 years23 of 100 (Routine)
29 November 1977New Orleans Jefferson, USdaily rain31.2 mm (1.2 in)19.3 mm (0.8 in)24 years20 of 100 (Routine)
2 November 1977New Orleans Jefferson, USdaily rain43.9 mm (1.7 in)10.9 mm (0.4 in)26 years15 of 100 (Routine)
24 October 1977New Orleans Jefferson, USdaily rain34.5 mm (1.4 in)30.4 mm (1.2 in)7 years26 of 100 (Routine)
11 October 1977New Orleans Jefferson, USdaily rain59.9 mm (2.4 in)34.8 mm (1.4 in)18 years32 of 100 (Routine)
15 September 1977New Orleans Jefferson, USdaily rain63.5 mm (2.5 in)5.6 mm (0.22 in)6 years6 of 100 (Routine)
5 September 1977New Orleans Jefferson, USdaily rain91.4 mm (3.6 in)17.0 mm (0.7 in)6 years11 of 100 (Routine)
24 August 1977New Orleans Jefferson, USdaily rain30.0 mm (1.2 in)5.4 mm (0.21 in)31 years15 of 100 (Routine)
22 August 1977New Orleans Jefferson, USdaily rain73.7 mm (2.9 in)19.6 mm (0.8 in)14 years19 of 100 (Routine)
25 July 1977New Orleans Jefferson, USdaily rain55.4 mm (2.2 in)2.1 mm (0.08 in)18 years9 of 100 (Routine)

Extremes by Year

1946 to 1978
Yearly extremes at New Orleans Jefferson: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)243.1 mm (9.6 in)1948100.1 mm (3.9 in)33
Wettest five days (Rx5day)396.7 mm (15.6 in)1948162.2 mm (6.4 in)33
Longest dry spell (CDD)45 days195220 days33

Wettest day (Rx1day)

Wettest day (Rx1day) at New Orleans Jefferson by year The wettest day of the year at New Orleans Jefferson, 1946 to 1978. The record is 243.1 mm (9.6 in) in 1948, marked on the chart; the median year is 100.1 mm (3.9 in). 050100150200250195019601970Record: 243.1 mm (9.6 in) in 1948
The wettest day of the year at New Orleans Jefferson, 1946 to 1978. The record is 243.1 mm (9.6 in) in 1948, marked on the chart; the median year is 100.1 mm (3.9 in).
Wettest day (Rx1day) at New Orleans Jefferson by year
YearWettest day (Rx1day)
194643.7 mm (1.7 in)
194770.1 mm (2.8 in)
1948243.1 mm (9.6 in)
1949172.2 mm (6.8 in)
195052.3 mm (2.1 in)
1951112.3 mm (4.4 in)
1952100.8 mm (4.0 in)
1953153.2 mm (6.0 in)
1954119.1 mm (4.7 in)
1955115.3 mm (4.5 in)
1956123.2 mm (4.9 in)
195794.0 mm (3.7 in)
195869.1 mm (2.7 in)
1959113.5 mm (4.5 in)
196081.3 mm (3.2 in)
1961100.1 mm (3.9 in)
196276.2 mm (3.0 in)
1963106.7 mm (4.2 in)
1964110.0 mm (4.3 in)
1965138.4 mm (5.4 in)
196671.9 mm (2.8 in)
1967167.6 mm (6.6 in)
196877.0 mm (3.0 in)
196969.3 mm (2.7 in)
197090.2 mm (3.6 in)
197197.3 mm (3.8 in)
197293.7 mm (3.7 in)
1973119.6 mm (4.7 in)
1974122.7 mm (4.8 in)
197586.4 mm (3.4 in)
197671.1 mm (2.8 in)
197791.4 mm (3.6 in)
1978216.4 mm (8.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at New Orleans Jefferson by year The wettest five days of the year at New Orleans Jefferson, 1946 to 1978. The record is 396.7 mm (15.6 in) in 1948, marked on the chart; the median year is 162.2 mm (6.4 in). 0100200300400195019601970Record: 396.7 mm (15.6 in) in 1948
The wettest five days of the year at New Orleans Jefferson, 1946 to 1978. The record is 396.7 mm (15.6 in) in 1948, marked on the chart; the median year is 162.2 mm (6.4 in).
Wettest five days (Rx5day) at New Orleans Jefferson by year
YearWettest five days (Rx5day)
1946112.8 mm (4.4 in)
1947163.4 mm (6.4 in)
1948396.7 mm (15.6 in)
1949194.5 mm (7.7 in)
195099.2 mm (3.9 in)
1951113.8 mm (4.5 in)
1952123.7 mm (4.9 in)
1953198.4 mm (7.8 in)
1954134.7 mm (5.3 in)
1955163.8 mm (6.4 in)
1956213.8 mm (8.4 in)
1957178.1 mm (7.0 in)
1958125.3 mm (4.9 in)
1959180.6 mm (7.1 in)
1960151.4 mm (6.0 in)
1961162.2 mm (6.4 in)
1962112.5 mm (4.4 in)
1963163.6 mm (6.4 in)
1964145.1 mm (5.7 in)
1965182.4 mm (7.2 in)
1966157.8 mm (6.2 in)
1967192.5 mm (7.6 in)
1968101.6 mm (4.0 in)
1969157.2 mm (6.2 in)
1970113.9 mm (4.5 in)
1971205.0 mm (8.1 in)
1972123.7 mm (4.9 in)
1973214.1 mm (8.4 in)
1974148.0 mm (5.8 in)
1975193.9 mm (7.6 in)
197698.7 mm (3.9 in)
1977193.4 mm (7.6 in)
1978277.3 mm (10.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at New Orleans Jefferson by year The longest dry spell of the year at New Orleans Jefferson, 1946 to 1978. The record is 45 days in 1952, marked on the chart; the median year is 20 days. 1020304050195019601970Record: 45 days in 1952
The longest dry spell of the year at New Orleans Jefferson, 1946 to 1978. The record is 45 days in 1952, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at New Orleans Jefferson by year
YearLongest dry spell (CDD)
194613 days
194717 days
194822 days
194926 days
195015 days
195124 days
195245 days
195323 days
195419 days
195531 days
195620 days
195718 days
195823 days
195918 days
196025 days
196120 days
196228 days
196339 days
196422 days
196529 days
196617 days
196728 days
196820 days
196919 days
197019 days
197124 days
197220 days
197315 days
197421 days
197518 days
197617 days
197713 days
197818 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, 1948 to 1977

A day with at least 99.3 mm (3.9 in) of rain is expected about once in 2 years. A day with at least 247.1 mm (9.7 in) of rain is expected about once in 100 years.

Rainfall return levels at New Orleans Jefferson: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years99.3 mm (3.9 in)
5 years131.7 mm (5.2 in)
10 years155.8 mm (6.1 in)
25 years189.5 mm (7.5 in)
50 years217.2 mm (8.6 in)Longer than the 30 years of record
100 years247.1 mm (9.7 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 1948 to 1977.

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: 243.1 mm (9.6 in) in 1948; 172.2 mm (6.8 in) in 1949; 167.6 mm (6.6 in) in 1967.

Download the Data

  • Data for New Orleans Jefferson standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for New Orleans Jefferson 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

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