Nouakchott weather in September

In September, Nouakchott sees average daytime highs of 32°C and overnight lows near 26°C, with 18 mm of rain across 2.8 wet days and about 12.1 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 32°C in the first days to 33°C by the end. The sky is clear or mostly clear about 63% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Nouakchott's 8th-clearest and 12th-windiest month. For the whole year in context, see Nouakchott's year-round climate.

Daytime high
32°
2nd warmest
Overnight low
26°
12th coldest
Rainfall
18 mm
2.8 wet days
Daylight
12 h 06 min
6:55 AM – 7:01 PM
Cloud cover
35%
8th clearest
Wind
17 km/h
12th windiest
Solar energy
6.55 kWh/m²
Travel score
4.7
out of 10

Nouakchott is capital of Mauritania.

Density
1,185/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 32°C in the first days to 33°C by the end.

A typical September day in Nouakchott reaches about 32°C in the afternoon and slips back to 26°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 36°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13126
23226
33226
43226
53226
63226
73226
83226
93226
103226
113226
123226
133226
143226
153226
163226
173226
183326
193326
203326
213326
223326
233326
243326
253326
263326
273326
283326
293326
303326

How September really feels in Nouakchott

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Nouakchott weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 17°20.3118.6
Feb27° / 18°10.311.48.3
Mar29° / 19°00.111.97.5
Apr29° / 20°0012.47.1
May30° / 21°0012.86.5
Jun31° / 23°0013.16.0
Jul30° / 24°20.4136.9
Aug31° / 26°132.412.65.9
Sep32° / 26°182.812.14.7
Oct33° / 25°61.111.64.5
Nov31° / 22°10.211.16.0
Dec27° / 19°40.310.98.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 63% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27228
37228
47327
57327
67426
77426
87525
97525
107525
117525
127525
137525
147624
157624
167525
177624
187624
197624
207624
217624
227624
237624
247822
257822
267921
277921
288119
298119
308218

Chance of precipitation in September

Any precipitation

Nouakchott gets around 18 mm of rain over 2.8 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 9% and peaks near 12% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
112
212
312
412
512
612
712
811
911
1011
1111
1210
1310
149
159
169
178
188
198
208
217
227
237
247
256
266
276
286
295
305

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 44% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100174744
200184744
300184744
400284743
500294643
600294643
700394542
8003104542
9004104541
10004104541
11015104540
12015104539
13015104538
14016104537
15016114536
16117114635
17127124633
18128124632
19128134531
20139144529
21139154528
221310164426
231410174425
241411184323
251411204221
261512224119
271513244017
281513263916
291514283714
302615293613

Wind in September

Winds average 17 km/h in September, the calmest month.

Across September, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
118light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over September. Sunrise moves from 6:53 AM to 6:58 AM, and sunset from 7:14 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:537:14
212.36:537:14
312.36:537:13
412.36:537:12
512.36:547:11
612.36:547:10
712.36:547:09
812.26:547:08
912.26:547:08
1012.26:547:07
1112.26:547:06
1212.26:557:05
1312.26:557:04
1412.16:557:03
1512.16:557:02
1612.16:557:01
1712.16:557:00
1812.16:566:59
1912.06:566:59
2012.06:566:58
2112.06:566:57
2212.06:566:56
2312.06:566:55
2412.06:566:54
2511.96:576:53
2611.96:576:52
2711.96:576:51
2811.96:576:51
2911.96:576:50
3011.96:586:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.55 kWh/m².

For context, solar energy here swings from a low near 4.87 kWh/m² to a high of 7.52 kWh/m² in May across the year — September's 6.55 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.6Intense
56.6Intense
66.6Intense
76.6Intense
86.6Intense
96.6Intense
106.6Intense
116.6Intense
126.6Intense
136.6Intense
146.6Intense
156.6Intense
166.6Intense
176.6Intense
186.6Intense
196.6Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.4Intense
Planning a trip in September

Hazard calendar for Nouakchott

In seasonPeak

In September, Nouakchott sits inside its atlantic hurricane and dust season. The full year is below, with each hazard's peak months called out.

Nouakchott sits in the Atlantic hurricane belt; the season peaks August–October.

Nouakchott sees dust haze year-round, heaviest in June.

Atlantic hurricane
Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Nouakchott?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.7
Sightseeing
11th-best month of the year
7.8
Beach & pool
12th-best month of the year

September is a reasonable time to visit Nouakchott for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Nouakchott in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Nouakchott sees daytime highs around 32°C and nights near 26°C. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Nouakchott in September

The nearest coast averages about 27°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 km away) is warmest in September at about 27°C and coldest in April near 18°C.

It's comfortable for a long swim from Jun 2 to Dec 23 — about 6.7 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar18Cool
Apr18Cool
May19Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec21Refreshing

UV index in Nouakchott in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nouakchott peaks around March 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighMar 16UV 12Dec 16UV 6
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar12Extreme
Apr10Extreme
May10Extreme
Jun10Very high
Jul9Very high
Aug10Very high
Sep10Very high
Oct9Very high
Nov7Very high
Dec6High

Air quality in Nouakchott in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Nouakchott is worst in January — around 154 µg/m³ PM2.5 (very unhealthy), about 2.5× the cleanest month (August, 60 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyJan 15152 µg/m³Aug 1962 µg/m³
PM2.5 (µg/m³)Level
Jan154Very unhealthy
Feb141Unhealthy
Mar110Unhealthy
Apr105Unhealthy
May113Unhealthy
Jun127Unhealthy
Jul79Unhealthy
Aug60Unhealthy
Sep71Unhealthy
Oct86Unhealthy
Nov88Unhealthy
Dec145Unhealthy
Location & terrain

Where is Nouakchott?

Nouakchott sits at 18.1°N, 16.0°W, 10 m above sea level, in Mauritania. The nearest listed city is Tevragh Zeina, 2.0 km away.

BoutilimittRossoTékaneRichard-TollDagana

Topography around Nouakchott

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nouakchott.

Within 3 km, the terrain around Nouakchott has only modest variations in elevation — a maximum elevation change of 18 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 27 m; within 80 km, only modest variations in elevation — a maximum elevation change of 70 m.

The land around Nouakchott is covered by artificial surfaces (76%) and bare terrain (22%) within 3 km, bare terrain (60%) and water (30%) within 16 km, and bare terrain (65%) and water (29%) within 80 km.

3 km
18 m
16 km
27 m
80 km
70 m
treesshrubsgrasslandartificial surfacesbare terrainwater
September weather nearby: Tevragh Zeina 2.0 km · Ksar 3.0 km · Dar Naim 6.0 km · Boutilimitt 148 km · Rosso 176 km · Tékane 178 km · Richard-Toll 183 km · Dagana 183 km

Mauritania travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type C / E / F
220 V · 50 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$2,198
2025
Happiness
4.5 / 10
World Happiness, 2025
Homicide rate
1
per 100k, 2020
Road deaths
25.6
per 100k/yr, 2019
Income group
Lower middle
World Bank
Religion
Muslim 100%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Nouakchott (18.0858°, -15.9785°, elevation 10 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).