Ganvié weather in September

In September, Ganvié sees average daytime highs of 28°C and overnight lows near 24°C, with 144 mm of rain across 22.3 wet days and about 12 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Ganvié's 9th-clearest and 6th-windiest month. For the whole year in context, see Ganvié's year-round climate.

Daytime high
28°
10th warmest
Overnight low
24°
3rd coldest
Rainfall
144 mm
22.3 wet days
Daylight
12 hours
6:44 AM – 6:46 PM
Cloud cover
80%
9th clearest
Wind
12 km/h
6th windiest
Solar energy
4.28 kWh/m²
Travel score
4.3
out of 10

Ganvié is human settlement in Benin.

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 28°C through the month.

A typical September day in Ganvié reaches about 28°C in the afternoon and slips back to 24°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12724
22724
32724
42724
52724
62724
72724
82724
92724
102724
112724
122724
132724
142824
152824
162824
172824
182824
192824
202824
212824
222824
232824
242824
252824
262824
272824
282824
292824
302824

How September really feels in Ganvié

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ganvié weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 25°298.411.75.5
Feb30° / 26°4011.111.84.6
Mar31° / 26°7317.5123.9
Apr30° / 26°981912.13.7
May30° / 25°17124.912.33.3
Jun28° / 25°22926.212.43.5
Jul27° / 24°14021.412.34.5
Aug27° / 24°9816.312.25.3
Sep28° / 24°14422.3124.3
Oct29° / 24°15525.411.93.6
Nov30° / 25°7518.711.74.1
Dec30° / 25°3710.511.65.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% 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 84%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11486
21486
31486
41486
51486
61486
71486
81486
91486
101486
111486
121486
131486
141486
151585
161585
171585
181684
191684
201684
211684
221783
231783
241783
251981
261981
271981
282080
292080
302179

Chance of precipitation in September

Any precipitation

Ganvié gets around 144 mm of rain over 22.3 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 74% and peaks near 79% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
167
268
369
469
570
670
771
871
972
1072
1173
1274
1374
1475
1575
1676
1776
1876
1977
2077
2177
2277
2377
2477
2577
2677
2777
2878
2978
3079

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 98% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
10991
11991
12991
13991
14991
15991
16991
17982
18982
19982
20982
21982
22973
23973
24973
25973
26964
27964
28955
29955
30946

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 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 12 minutes over September. Sunrise moves from 6:46 AM to 6:41 AM, and sunset from 6:54 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:466:54
212.16:466:53
312.16:466:53
412.16:466:52
512.16:466:52
612.16:466:51
712.16:456:51
812.16:456:50
912.16:456:50
1012.16:456:49
1112.16:456:49
1212.16:446:48
1312.16:446:47
1412.06:446:47
1512.06:446:46
1612.06:446:46
1712.06:446:45
1812.06:436:45
1912.06:436:44
2012.06:436:44
2112.06:436:43
2212.06:436:42
2312.06:426:42
2412.06:426:41
2512.06:426:41
2612.06:426:40
2712.06:426:40
2812.06:426:39
2912.06:416:39
3011.96:416:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.28 kWh/m².

For context, solar energy here swings from a low near 4.04 kWh/m² to a high of 5.41 kWh/m² in February across the year — September's 4.28 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.2Bright
64.2Bright
74.2Bright
84.2Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
Planning a trip in September

Hazard calendar for Ganvié

In seasonPeak

None of Ganvié's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Ganvié sees seasonal dust haze (January–April), heaviest in February.

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

Is September a good time to visit Ganvié?

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

4.3
Sightseeing
6th-best month of the year
4.6
Beach & pool
9th-best month of the year

September is a reasonable time to visit Ganvié for sightseeing.

What to pack for Ganvié in September

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

In September, Ganvié sees daytime highs around 28°C and nights near 24°C. Pack light clothes and rain gear. About 22 days see rain.

light clothesrain gear

Sea temperature near Ganvié in September

The nearest coast averages about 26°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 May at about 29°C and coldest in August near 25°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Warm
Jul26Warm
Aug25Warm
Sep26Warm
Oct27Warm
Nov29Tropical
Dec28Tropical

UV index in Ganvié 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 Ganvié peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeExtremeVery highApr 10UV 13Dec 17UV 8
UV index (midday)Level
Jan9Very high
Feb10Very high
Mar13Extreme
Apr13Extreme
May11Extreme
Jun11Extreme
Jul10Extreme
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov9Very high
Dec8Very high

Air quality in Ganvié 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 Ganvié is worst in January — around 102 µg/m³ PM2.5 (unhealthy), about 4.2× the cleanest month (August, 25 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyJan 16100 µg/m³Aug 1425 µg/m³
PM2.5 (µg/m³)Level
Jan102Unhealthy
Feb86Unhealthy
Mar47Poor
Apr44Poor
May33Moderate
Jun30Moderate
Jul27Moderate
Aug25Moderate
Sep29Moderate
Oct39Poor
Nov46Poor
Dec89Unhealthy
Location & terrain

Where is Ganvié?

Ganvié sits at 6.5°N, 2.4°E, 2 m above sea level, in Benin. The nearest listed city is Abomey-Calavi, 4.0 km away.

Topography around Ganvié

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

Within 3 km, the terrain around Ganvié has only modest variations in elevation — a maximum elevation change of 5 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 62 m; within 80 km, only modest variations in elevation — a maximum elevation change of 181 m.

The land around Ganvié is covered by water (55%) and wetland (40%) within 3 km, water (27%), artificial surfaces (26%) and wetland (21%) within 16 km, and trees (38%) and water (32%) within 80 km.

3 km
5 m
16 km
62 m
80 km
181 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Abomey-Calavi 4.0 km · Godomè 10 km · Cotonou 11 km · Zinvié 17 km · Ekpé 18 km · Porto-Novo 24 km · Missérété 24 km · Semi 27 km

Benin travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$1,658
2025
Happiness
4.4 / 10
World Happiness, 2025
Safe drinking water
18%
of population, 2024
Homicide rate
1.1
per 100k, 2017
Road deaths
26.8
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 406
Religion
Muslim 28%Roman Catholic 26%Protestant 14%Vodoun 12%

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 Ganvié (6.4644°, 2.3929°, elevation 2 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. 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).