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Nouadhibou Port-Etienne Weather Records (MR000001415)

Record envelope, standing records and threshold days for Nouadhibou Port-Etienne (MR000001415), Mauritania, with 41 years of record.

Key Facts for Nouadhibou Port-Etienne

  • Nouadhibou Port-Etienne (MR000001415) is a weather station in Mauritania at 20.93 latitude and -17.05 longitude, 8 m (26 ft) above sea level.
  • The station reports from 1940 to 1980, 41 years of record.
  • 1,464 records set at Nouadhibou Port-Etienne still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Nouadhibou Port-Etienne tied a daily record low maximum temperature of 21.6 C (70.9 F) on 9 December 1980.

About the Station

  • Location: Mauritania, 20.93 latitude, -17.05 longitude.
  • Elevation: 8 m (26 ft).
  • Period of record: 1940 to 1980, 41 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Nouadhibou Port-Etienne, with 2026 drawn through them The band shows the record high and record low for each calendar day at Nouadhibou Port-Etienne. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 01020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Nouadhibou Port-Etienne. 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 Nouadhibou Port-Etienne, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan33.5 C (92.3 F)6.6 C (43.9 F)n/an/a
Feb34.0 C (93.2 F)9.0 C (48.2 F)n/an/a
Mar38.5 C (101.3 F)11.0 C (51.8 F)n/an/a
Apr39.8 C (103.6 F)11.0 C (51.8 F)n/an/a
May42.0 C (107.6 F)11.7 C (53.1 F)n/an/a
Jun41.0 C (105.8 F)12.6 C (54.7 F)n/an/a
Jul39.0 C (102.2 F)15.5 C (59.9 F)n/an/a
Aug39.7 C (103.5 F)14.6 C (58.3 F)n/an/a
Sep41.5 C (106.7 F)15.8 C (60.4 F)n/an/a
Oct39.7 C (103.5 F)14.2 C (57.6 F)n/an/a
Nov36.8 C (98.2 F)11.5 C (52.7 F)n/an/a
Dec32.9 C (91.2 F)8.0 C (46.4 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Nouadhibou Port-Etienne by the year they were set 1,464 records at Nouadhibou Port-Etienne still stand. 1952 holds the most, with 58. 02040601940: 491941: 331942: 171943: 561944: 331945: 381946: 391947: 471948: 391949: 381950: 321951: 341952: 581953: 331954: 271955: 201956: 281957: 441958: 391959: 321960: 261961: 251962: 231963: 341964: 381965: 341967: 371968: 361969: 371970: 421971: 471972: 451973: 351974: 301975: 361976: 421977: 471978: 461979: 391980: 291940194419481952195619601964196919731977
1,464 records at Nouadhibou Port-Etienne still stand. 1952 holds the most, with 58.
Standing records at Nouadhibou Port-Etienne by the year they were set
Year setStanding records
194049
194133
194217
194356
194433
194538
194639
194747
194839
194938
195032
195134
195258
195333
195427
195520
195628
195744
195839
195932
196026
196125
196223
196334
196438
196534
196737
196836
196937
197042
197147
197245
197335
197430
197536
197642
197747
197846
197939
198029

Wettest Day of Each Month

Sep: 53.2 mm (2.1 in)
Record daily precipitation for each month at Nouadhibou Port-Etienne The wettest day on record for each calendar month at Nouadhibou Port-Etienne. The most was 53.2 mm (2.1 in) on 19 September 1951. 0204060 Jan: 8.2 mm (0.32 in), 17 January 1953 Jan Feb: 10.7 mm (0.4 in), 13 February 1951 Feb Mar: 26.8 mm (1.1 in), 7 March 1953 Mar Apr: 14.3 mm (0.6 in), 22 April 1960 Apr May: 1.2 mm (0.05 in), 31 May 1952 May Jun: 3.3 mm (0.13 in), 2 June 1949 Jun Jul: 10.2 mm (0.4 in), 15 July 1964 Jul Aug: 12.7 mm (0.5 in), 29 August 1964 Aug Sep: 53.2 mm (2.1 in), 19 September 1951 Sep Oct: 27.4 mm (1.1 in), 10 October 1953 Oct Nov: 41.5 mm (1.6 in), 29 November 1949 Nov Dec: 6.5 mm (0.26 in), 24 December 1978 Dec
The wettest day on record for each calendar month at Nouadhibou Port-Etienne. The most was 53.2 mm (2.1 in) on 19 September 1951.
Record daily precipitation for each month at Nouadhibou Port-Etienne
MonthRecord daily precipitation (mm)Date
Jan8.2 mm (0.32 in)17 January 1953
Feb10.7 mm (0.4 in)13 February 1951
Mar26.8 mm (1.1 in)7 March 1953
Apr14.3 mm (0.6 in)22 April 1960
May1.2 mm (0.05 in)31 May 1952
Jun3.3 mm (0.13 in)2 June 1949
Jul10.2 mm (0.4 in)15 July 1964
Aug12.7 mm (0.5 in)29 August 1964
Sep53.2 mm (2.1 in)19 September 1951
Oct27.4 mm (1.1 in)10 October 1953
Nov41.5 mm (1.6 in)29 November 1949
Dec6.5 mm (0.26 in)24 December 1978

Period of Record Coverage

1940 to 1980
Days with data per year at Nouadhibou Port-Etienne 40 years of record at Nouadhibou Port-Etienne, 1940 to 1980. 1 years have data for under 90 percent of days and are left out of rankings: 1975. 1940: 360 of 366 days1941: 351 of 365 days1942: 339 of 365 days1943: 361 of 365 days1944: 366 of 366 days1945: 363 of 365 days1946: 365 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 364 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 303 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 364 of 365 days1979: 365 of 365 days1980: 366 of 366 days194019451950195519601965197019751980
40 years of record at Nouadhibou Port-Etienne, 1940 to 1980. 1 years have data for under 90 percent of days and are left out of rankings: 1975.
Days with data per year at Nouadhibou Port-Etienne
YearDays with dataShare of yearComplete
194036098%Yes
194135196%Yes
194233993%Yes
194336199%Yes
1944366100%Yes
194536399%Yes
1946365100%Yes
1947365100%Yes
1948366100%Yes
1949365100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962364100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
197530383%No
1976366100%Yes
1977365100%Yes
1978364100%Yes
1979365100%Yes
1980366100%Yes

Latest Records

20
Latest records at Nouadhibou Port-Etienne
DateStationRecordValueBeat old record byOld record stoodSignificance
9 December 1980Nouadhibou Port-Etienne, MRdaily low max (Tie)21.6 C (70.9 F)tie26 years2 of 100 (Routine)
2 December 1980Nouadhibou Port-Etienne, MRdaily low min13.0 C (55.4 F)0.5 C (0.9 F)16 years10 of 100 (Routine)
30 November 1980Nouadhibou Port-Etienne, MRdaily low min12.0 C (53.6 F)0.1 C (0.2 F)20 years10 of 100 (Routine)
27 November 1980Nouadhibou Port-Etienne, MRdaily low min (Tie)14.0 C (57.2 F)tie3 years1 of 100 (Routine)
23 November 1980Nouadhibou Port-Etienne, MRdaily low min (Tie)13.8 C (56.8 F)tie37 years3 of 100 (Routine)
7 November 1980Nouadhibou Port-Etienne, MRdaily rain4.3 mm (0.17 in)3.5 mm (0.14 in)22 years14 of 100 (Routine)
2 November 1980Nouadhibou Port-Etienne, MRdaily low min (Tie)15.0 C (59.0 F)tie21 years2 of 100 (Routine)
1 November 1980Nouadhibou Port-Etienne, MRdaily low min15.0 C (59.0 F)0.3 C (0.5 F)13 years8 of 100 (Routine)
27 October 1980Nouadhibou Port-Etienne, MRmonthly low min14.2 C (57.6 F)0.2 C (0.4 F)33 years25 of 100 (Routine)
14 October 1980Nouadhibou Port-Etienne, MRdaily low max (Tie)22.8 C (73.0 F)tie33 years3 of 100 (Routine)
11 October 1980Nouadhibou Port-Etienne, MRdaily low min (Tie)16.7 C (62.1 F)tie5 years1 of 100 (Routine)
5 September 1980Nouadhibou Port-Etienne, MRdaily high max37.7 C (99.9 F)0.7 C (1.3 F)10 years8 of 100 (Routine)
19 July 1980Nouadhibou Port-Etienne, MRdaily low max22.6 C (72.7 F)0.3 C (0.5 F)17 years9 of 100 (Routine)
16 June 1980Nouadhibou Port-Etienne, MRdaily high min19.8 C (67.6 F)0.1 C (0.2 F)30 years13 of 100 (Routine)
8 June 1980Nouadhibou Port-Etienne, MRdaily high min18.6 C (65.5 F)0.1 C (0.2 F)28 years12 of 100 (Routine)
18 May 1980Nouadhibou Port-Etienne, MRdaily high min18.4 C (65.1 F)0.1 C (0.2 F)37 years15 of 100 (Routine)
6 May 1980Nouadhibou Port-Etienne, MRdaily high min (Tie)17.0 C (62.6 F)tie10 years1 of 100 (Routine)
14 April 1980Nouadhibou Port-Etienne, MRdaily high min19.2 C (66.6 F)1.1 C (2.0 F)35 years21 of 100 (Routine)
3 April 1980Nouadhibou Port-Etienne, MRdaily high min19.2 C (66.6 F)0.9 C (1.6 F)18 years15 of 100 (Routine)
2 April 1980Nouadhibou Port-Etienne, MRdaily high min20.8 C (69.4 F)2.0 C (3.6 F)36 years27 of 100 (Routine)

Climate Trend

38 complete years, 1940 to 1980
Annual mean temperature at Nouadhibou Port-Etienne as warming stripes, 1940 to 1980 One stripe for each of 38 complete years at Nouadhibou Port-Etienne, 1940 to 1980. Blue stripes are years cooler than the station's own mean of 21.8 C (71.3 F); red stripes are warmer. The coolest year was 1959, at 21.3 C (70.3 F), and the warmest was 1969, at 22.6 C (72.7 F). The strongest colour marks a difference of 0.8 C (1.4 F). 1940: 21.8 C, 0.0 C from the station mean1941: 21.7 C, -0.1 C from the station mean1943: 21.8 C, 0.0 C from the station mean1944: 21.9 C, 0.0 C from the station mean1945: 22.3 C, +0.5 C from the station mean1946: 21.5 C, -0.3 C from the station mean1947: 21.6 C, -0.2 C from the station mean1948: 21.7 C, -0.1 C from the station mean1949: 22.2 C, +0.4 C from the station mean1950: 22.2 C, +0.4 C from the station mean1951: 21.5 C, -0.3 C from the station mean1952: 22.0 C, +0.2 C from the station mean1953: 21.9 C, 0.0 C from the station mean1954: 21.5 C, -0.4 C from the station mean1955: 21.8 C, 0.0 C from the station mean1956: 21.4 C, -0.4 C from the station mean1957: 21.5 C, -0.3 C from the station mean1958: 22.1 C, +0.3 C from the station mean1959: 21.3 C, -0.5 C from the station mean1960: 21.4 C, -0.4 C from the station mean1961: 22.2 C, +0.4 C from the station mean1962: 21.9 C, 0.0 C from the station mean1963: 22.4 C, +0.6 C from the station mean1964: 21.9 C, +0.1 C from the station mean1965: 21.7 C, -0.1 C from the station mean1967: 21.8 C, 0.0 C from the station mean1968: 21.4 C, -0.4 C from the station mean1969: 22.6 C, +0.8 C from the station mean1970: 22.2 C, +0.4 C from the station mean1971: 21.7 C, -0.2 C from the station mean1972: 21.5 C, -0.3 C from the station mean1973: 21.7 C, -0.1 C from the station mean1974: 21.5 C, -0.3 C from the station mean1976: 21.6 C, -0.2 C from the station mean1977: 22.0 C, +0.1 C from the station mean1978: 21.9 C, +0.1 C from the station mean1979: 22.4 C, +0.6 C from the station mean1980: 21.9 C, +0.1 C from the station mean194019451950195519601965197019751980
One stripe for each of 38 complete years at Nouadhibou Port-Etienne, 1940 to 1980. Blue stripes are years cooler than the station's own mean of 21.8 C (71.3 F); red stripes are warmer. The coolest year was 1959, at 21.3 C (70.3 F), and the warmest was 1969, at 22.6 C (72.7 F). The strongest colour marks a difference of 0.8 C (1.4 F).
Annual mean temperature at Nouadhibou Port-Etienne as warming stripes, 1940 to 1980
YearAnnual mean temperatureDifference from the station mean
194021.8 C-0.03 C
194121.7 C-0.13 C
194321.8 C-0.03 C
194421.9 C+0.03 C
194522.3 C+0.49 C
194621.5 C-0.32 C
194721.6 C-0.19 C
194821.7 C-0.13 C
194922.2 C+0.36 C
195022.2 C+0.42 C
195121.5 C-0.32 C
195222.0 C+0.16 C
195321.9 C+0.03 C
195421.5 C-0.36 C
195521.8 C-0.03 C
195621.4 C-0.39 C
195721.5 C-0.30 C
195822.1 C+0.27 C
195921.3 C-0.54 C
196021.4 C-0.44 C
196122.2 C+0.38 C
196221.9 C+0.04 C
196322.4 C+0.58 C
196421.9 C+0.12 C
196521.7 C-0.14 C
196721.8 C+0.01 C
196821.4 C-0.38 C
196922.6 C+0.80 C
197022.2 C+0.38 C
197121.7 C-0.17 C
197221.5 C-0.32 C
197321.7 C-0.08 C
197421.5 C-0.31 C
197621.6 C-0.18 C
197722.0 C+0.14 C
197821.9 C+0.09 C
197922.4 C+0.60 C
198021.9 C+0.06 C

The fitted trend in annual mean temperature here over 1940 to 1980 is 0.03 C (-0.06 to 0.12) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Nouadhibou Port-Etienne
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.03 C (-0.06 to 0.12) per decade0.1 F (-0.1 to 0.2) per decade1940 to 198038Not clearly different from zero
Mean daily maximum0.2 C (0.1 to 0.3) per decade0.4 F (0.1 to 0.6) per decade1940 to 198038Rise
Mean daily minimum-0.14 C (-0.26 to -0.02) per decade-0.25 F (-0.47 to -0.03) per decade1940 to 198038Fall

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1940 to 1980
Yearly extremes at Nouadhibou Port-Etienne: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.0 C (107.6 F)194339.0 C (102.2 F)40
Coldest night (TNn)6.6 C (43.9 F)194710.0 C (50.0 F)40
Wettest day (Rx1day)53.2 mm (2.1 in)19518.5 mm (0.33 in)40
Wettest five days (Rx5day)58.2 mm (2.3 in)194910.2 mm (0.4 in)40
Longest dry spell (CDD)366 days1944198 days40

Hottest day (TXx)

Hottest day (TXx) at Nouadhibou Port-Etienne by year The hottest day of the year at Nouadhibou Port-Etienne, 1940 to 1980. The record is 42.0 C (107.6 F) in 1943, marked on the chart; the median year is 39.0 C (102.2 F). 3638404219401950196019701980Record: 42.0 C (107.6 F) in 1943
The hottest day of the year at Nouadhibou Port-Etienne, 1940 to 1980. The record is 42.0 C (107.6 F) in 1943, marked on the chart; the median year is 39.0 C (102.2 F).
Hottest day (TXx) at Nouadhibou Port-Etienne by year
YearHottest day (TXx)
194041.5 C (106.7 F)
194137.5 C (99.5 F)
194238.0 C (100.4 F)
194342.0 C (107.6 F)
194439.2 C (102.6 F)
194537.6 C (99.7 F)
194638.4 C (101.1 F)
194739.0 C (102.2 F)
194840.3 C (104.5 F)
194938.3 C (100.9 F)
195037.8 C (100.0 F)
195136.9 C (98.4 F)
195239.0 C (102.2 F)
195339.5 C (103.1 F)
195439.5 C (103.1 F)
195538.8 C (101.8 F)
195638.3 C (100.9 F)
195739.7 C (103.5 F)
195840.4 C (104.7 F)
195939.5 C (103.1 F)
196038.2 C (100.8 F)
196139.8 C (103.6 F)
196237.3 C (99.1 F)
196338.5 C (101.3 F)
196438.9 C (102.0 F)
196539.2 C (102.6 F)
196739.0 C (102.2 F)
196839.7 C (103.5 F)
196939.6 C (103.3 F)
197037.5 C (99.5 F)
197139.0 C (102.2 F)
197239.7 C (103.5 F)
197337.8 C (100.0 F)
197439.5 C (103.1 F)
197537.3 C (99.1 F)
197640.8 C (105.4 F)
197739.1 C (102.4 F)
197837.6 C (99.7 F)
197941.0 C (105.8 F)
198038.5 C (101.3 F)

Coldest night (TNn)

Coldest night (TNn) at Nouadhibou Port-Etienne by year The coldest night of the year at Nouadhibou Port-Etienne, 1940 to 1980. The record is 6.6 C (43.9 F) in 1947, marked on the chart; the median year is 10.0 C (50.0 F). 68101219401950196019701980Record: 6.6 C (43.9 F) in 1947
The coldest night of the year at Nouadhibou Port-Etienne, 1940 to 1980. The record is 6.6 C (43.9 F) in 1947, marked on the chart; the median year is 10.0 C (50.0 F).
Coldest night (TNn) at Nouadhibou Port-Etienne by year
YearColdest night (TNn)
194010.0 C (50.0 F)
194110.2 C (50.4 F)
19429.9 C (49.8 F)
194311.0 C (51.8 F)
194410.8 C (51.4 F)
19459.5 C (49.1 F)
19469.3 C (48.7 F)
19476.6 C (43.9 F)
194811.4 C (52.5 F)
19499.6 C (49.3 F)
195010.8 C (51.4 F)
195111.2 C (52.2 F)
19528.5 C (47.3 F)
195312.0 C (53.6 F)
195410.5 C (50.9 F)
195510.2 C (50.4 F)
19569.8 C (49.6 F)
195710.2 C (50.4 F)
195811.3 C (52.3 F)
19599.2 C (48.6 F)
196010.0 C (50.0 F)
196110.0 C (50.0 F)
196210.2 C (50.4 F)
196310.6 C (51.1 F)
196410.8 C (51.4 F)
19659.0 C (48.2 F)
19679.6 C (49.3 F)
19689.2 C (48.6 F)
196911.0 C (51.8 F)
19708.0 C (46.4 F)
197110.6 C (51.1 F)
19728.7 C (47.7 F)
19739.2 C (48.6 F)
19749.0 C (48.2 F)
197510.0 C (50.0 F)
19768.7 C (47.7 F)
19779.8 C (49.6 F)
197810.0 C (50.0 F)
197910.9 C (51.6 F)
198011.4 C (52.5 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Nouadhibou Port-Etienne by year The wettest day of the year at Nouadhibou Port-Etienne, 1940 to 1980. The record is 53.2 mm (2.1 in) in 1951, marked on the chart; the median year is 8.5 mm (0.33 in). 020406019401950196019701980Record: 53.2 mm (2.1 in) in 1951
The wettest day of the year at Nouadhibou Port-Etienne, 1940 to 1980. The record is 53.2 mm (2.1 in) in 1951, marked on the chart; the median year is 8.5 mm (0.33 in).
Wettest day (Rx1day) at Nouadhibou Port-Etienne by year
YearWettest day (Rx1day)
19408.9 mm (0.35 in)
194112.1 mm (0.5 in)
194220.3 mm (0.8 in)
194311.0 mm (0.4 in)
19440.5 mm (0.02 in)
19452.0 mm (0.08 in)
19464.6 mm (0.18 in)
19473.5 mm (0.14 in)
19483.3 mm (0.13 in)
194941.5 mm (1.6 in)
19507.5 mm (0.30 in)
195153.2 mm (2.1 in)
19527.6 mm (0.30 in)
195327.4 mm (1.1 in)
195410.5 mm (0.4 in)
19555.4 mm (0.21 in)
195611.7 mm (0.5 in)
195710.8 mm (0.4 in)
19584.1 mm (0.16 in)
19590.7 mm (0.03 in)
196014.3 mm (0.6 in)
19612.1 mm (0.08 in)
196210.8 mm (0.4 in)
196310.8 mm (0.4 in)
196412.7 mm (0.5 in)
196513.1 mm (0.5 in)
19679.3 mm (0.37 in)
19689.7 mm (0.38 in)
19698.1 mm (0.32 in)
19702.7 mm (0.11 in)
19719.8 mm (0.39 in)
19721.4 mm (0.06 in)
19737.0 mm (0.28 in)
19744.2 mm (0.17 in)
19752.9 mm (0.11 in)
197610.1 mm (0.4 in)
19770.0 mm (0.00 in)
197815.6 mm (0.6 in)
19796.7 mm (0.26 in)
19804.9 mm (0.19 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Nouadhibou Port-Etienne by year The wettest five days of the year at Nouadhibou Port-Etienne, 1940 to 1980. The record is 58.2 mm (2.3 in) in 1949, marked on the chart; the median year is 10.2 mm (0.4 in). 020406019401950196019701980Record: 58.2 mm (2.3 in) in 1949
The wettest five days of the year at Nouadhibou Port-Etienne, 1940 to 1980. The record is 58.2 mm (2.3 in) in 1949, marked on the chart; the median year is 10.2 mm (0.4 in).
Wettest five days (Rx5day) at Nouadhibou Port-Etienne by year
YearWettest five days (Rx5day)
19401.1 mm (0.04 in)
194113.0 mm (0.5 in)
194244.2 mm (1.7 in)
194311.0 mm (0.4 in)
19440.5 mm (0.02 in)
19452.0 mm (0.08 in)
19464.6 mm (0.18 in)
19473.5 mm (0.14 in)
19485.1 mm (0.20 in)
194958.2 mm (2.3 in)
19509.4 mm (0.37 in)
195155.7 mm (2.2 in)
195211.8 mm (0.5 in)
195327.9 mm (1.1 in)
195413.3 mm (0.5 in)
19555.4 mm (0.21 in)
195613.6 mm (0.5 in)
195721.2 mm (0.8 in)
19589.3 mm (0.37 in)
19590.7 mm (0.03 in)
196014.7 mm (0.6 in)
19612.1 mm (0.08 in)
196213.1 mm (0.5 in)
196317.2 mm (0.7 in)
196414.2 mm (0.6 in)
196516.9 mm (0.7 in)
196711.7 mm (0.5 in)
196817.4 mm (0.7 in)
19698.1 mm (0.32 in)
19702.7 mm (0.11 in)
197120.4 mm (0.8 in)
19721.4 mm (0.06 in)
19737.1 mm (0.28 in)
19744.2 mm (0.17 in)
19753.5 mm (0.14 in)
197614.2 mm (0.6 in)
19770.0 mm (0.00 in)
197817.4 mm (0.7 in)
19797.8 mm (0.31 in)
19808.0 mm (0.31 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Nouadhibou Port-Etienne by year The longest dry spell of the year at Nouadhibou Port-Etienne, 1940 to 1980. The record is 366 days in 1944, marked on the chart; the median year is 198 days. 10020030040019401950196019701980Record: 366 days in 1944
The longest dry spell of the year at Nouadhibou Port-Etienne, 1940 to 1980. The record is 366 days in 1944, marked on the chart; the median year is 198 days.
Longest dry spell (CDD) at Nouadhibou Port-Etienne by year
YearLongest dry spell (CDD)
1940144 days
1941134 days
1942160 days
1943100 days
1944366 days
1945306 days
1946242 days
1947262 days
1948229 days
1949101 days
1950128 days
1951199 days
1952117 days
1953168 days
1954203 days
1955313 days
1956196 days
1957136 days
1958196 days
1959365 days
1960128 days
1961179 days
1962242 days
1963169 days
1964196 days
1965230 days
1967244 days
1968204 days
1969188 days
1970247 days
1971243 days
1972285 days
1973144 days
1974262 days
1975122 days
1976136 days
1977365 days
1978249 days
1979162 days
1980226 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

39 years, 1940 to 1980

A day with at least 7.4 mm (0.29 in) of rain is expected about once in 2 years. A day with at least 51.9 mm (2.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Nouadhibou Port-Etienne: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years7.4 mm (0.29 in)
5 years14.7 mm (0.6 in)
10 years20.9 mm (0.8 in)
25 years31.0 mm (1.2 in)
50 years40.5 mm (1.6 in)Longer than the 39 years of record
100 years51.9 mm (2.0 in)Longer than the 39 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, 39 years of values from 1940 to 1980.

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: 53.2 mm (2.1 in) in 1951; 41.5 mm (1.6 in) in 1949; 27.4 mm (1.1 in) in 1953.

Download the Data

  • Data for Nouadhibou Port-Etienne standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Nouadhibou Port-Etienne 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).