Joal weather in September

In September, Joal sees average daytime highs of 30°C and overnight lows near 26°C, with 128 mm of rain across 15.7 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Joal's 11th-clearest and 11th-windiest month. For the whole year in context, see Joal's year-round climate.

Daytime high
30°
4th warmest
Overnight low
26°
12th coldest
Rainfall
128 mm
15.7 wet days
Daylight
12 h 06 min
6:59 AM – 7:04 PM
Cloud cover
66%
11th clearest
Wind
11 km/h
11th windiest
Solar energy
5.28 kWh/m²
Travel score
4.3
out of 10

Joal is city in Senegal.

Density
2,647/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

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Joal reaches about 30°C in the afternoon and slips back to 26°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12926
22926
32926
42926
52926
63026
73026
83026
93026
103026
113026
123026
133026
143026
153026
163026
173026
183026
193026
203026
213026
223026
233026
243026
253026
263026
273026
283026
293026
303026

How September really feels in Joal

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.

Joal weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 19°20.211.37.2
Feb29° / 20°10.111.56.8
Mar30° / 20°00.111.96.6
Apr30° / 20°0012.36.8
May29° / 22°00.112.67.0
Jun29° / 24°40.712.86.8
Jul29° / 26°61912.85.4
Aug29° / 26°18418.112.54.2
Sep30° / 26°12815.712.14.3
Oct31° / 26°355.111.75.0
Nov32° / 23°10.211.35.2
Dec30° / 21°20.311.26.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 59%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12674
22674
32872
42872
52971
63070
73268
83466
93466
103664
113664
123961
134060
144060
154159
164258
174456
184456
194555
204654
214753
224753
234753
244951
255050
265149
275248
285347
295446
305545

Chance of precipitation in September

Any precipitation

Joal gets around 128 mm of rain over 15.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 51% and peaks near 63% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
163
262
362
461
561
660
759
859
958
1057
1157
1256
1355
1455
1554
1653
1752
1851
1950
2049
2148
2246
2345
2443
2542
2640
2738
2836
2935
3033

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 85% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
12179
22080
32080
41981
51882
61882
71783
81783
91684
101684
111585
121585
131585
141486
151486
161387
171387
181387
191288
201288
211288
221288
231288
241288
251288
261387
271387
281486
291486
301585

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512calm
612calm
712calm
812calm
912calm
1012calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 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 24 minutes over September. Sunrise moves from 6:59 AM to 7:00 AM, and sunset from 7:15 PM to 6:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:597:15
212.36:597:15
312.36:597:14
412.26:597:13
512.26:597:13
612.26:597:12
712.26:597:11
812.26:597:10
912.26:597:09
1012.26:597:09
1112.16:597:08
1212.16:597:07
1312.16:597:06
1412.16:597:06
1512.16:597:05
1612.16:597:04
1712.16:597:03
1812.16:597:03
1912.06:597:02
2012.07:007:01
2112.07:007:00
2212.07:006:59
2312.07:006:59
2412.07:006:58
2512.07:006:57
2611.97:006:56
2711.97:006:56
2811.97:006:55
2911.97:006:54
3011.97:006:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.28 kWh/m².

For context, solar energy here swings from a low near 5.04 kWh/m² to a high of 7.22 kWh/m² in April across the year — September's 5.28 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.2Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.4Bright
205.4Bright
215.4Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.6Bright
275.6Bright
285.6Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Joal

In seasonPeak

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

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

Joal sees seasonal dust haze (January–October), 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 Joal?

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

4.3
Sightseeing
11th-best month of the year
5.9
Beach & pool
11th-best month of the year

September is a reasonable time to visit Joal for sightseeing.

What to pack for Joal in September

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

In September, Joal sees daytime highs around 30°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

Sea temperature near Joal in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in October at about 29°C and coldest in March near 19°C.

It's comfortable for a long swim from Apr 16 to Feb 5 — about 9.7 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb20Cool
Mar19Cool
Apr20Cool
May22Refreshing
Jun26Warm
Jul28Warm
Aug28Tropical
Sep29Tropical
Oct29Tropical
Nov27Warm
Dec24Refreshing

UV index in Joal in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Joal peaks around March 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highMar 18UV 13Dec 18UV 7
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar13Extreme
Apr12Extreme
May11Extreme
Jun10Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Joal 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 Joal is worst in February — around 105 µg/m³ PM2.5 (unhealthy), about 3.2× the cleanest month (August, 33 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorPoorUnhealthyFeb 10104 µg/m³Aug 1834 µg/m³
PM2.5 (µg/m³)Level
Jan100Unhealthy
Feb105Unhealthy
Mar84Unhealthy
Apr66Unhealthy
May60Unhealthy
Jun71Unhealthy
Jul46Poor
Aug33Moderate
Sep41Poor
Oct66Unhealthy
Nov76Unhealthy
Dec96Unhealthy
Location & terrain

Where is Joal?

Joal sits at 14.2°N, 16.8°W, 8 m above sea level, in Senegal. The nearest listed city is Mbour, 30 km away.

NguékhokhFatickPoukham UnGandiayeKhombole

Topography around Joal

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

Within 3 km, the terrain around Joal has only modest variations in elevation — a maximum elevation change of 14 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 35 m; within 80 km, only modest variations in elevation — a maximum elevation change of 144 m.

The land around Joal is covered by water (46%) within 3 km, water (54%) within 16 km, and water (39%) and cropland (33%) within 80 km.

3 km
14 m
16 km
35 m
80 km
144 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Mbour 30 km · Thiadiaye 32 km · Sali 35 km · Nguékhokh 41 km · Fatick 51 km · Poukham Un 51 km · Gandiaye 63 km · Khombole 68 km

Senegal travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / D / E / K
230 V · 50 Hz
Prices
≈ 36% of US
price level, 2025
GDP per capita
$1,955
2025
Happiness
4.8 / 10
World Happiness, 2025
Safe drinking water
27%
of population, 2024
Homicide rate
0.3
per 100k, 2015
Road deaths
23.5
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 442
Religion
Muslim 97%Christian 3%

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 Joal (14.1731°, -16.8493°, elevation 8 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).