Abomey-Calavi weather in September

In September, Abomey-Calavi sees average daytime highs of 28°C and overnight lows near 24°C, with 141 mm of rain across 22.7 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 2% 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 Abomey-Calavi's 9th-clearest and 6th-windiest month. For the whole year in context, see Abomey-Calavi's year-round climate.

Daytime high
28°
10th warmest
Overnight low
24°
3rd coldest
Rainfall
141 mm
22.7 wet days
Daylight
12 hours
6:44 AM – 6:46 PM
Cloud cover
80%
9th clearest
Wind
11 km/h
6th windiest
Solar energy
4.35 kWh/m²
Travel score
4.1
out of 10

Abomey-Calavi is commune and city in Atlantique Department, Benin.

Density
593/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 28°C through the month.

A typical September day in Abomey-Calavi 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 about 1°C warmer than August and about 1°C cooler than October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12724
22724
32724
42824
52824
62824
72824
82824
92824
102824
112824
122824
132824
142824
152824
162824
172824
182824
192824
202824
212824
222824
232824
242824
252824
262824
272824
282824
292824
302824

How September really feels in Abomey-Calavi

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.

Abomey-Calavi 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°257.811.75.2
Feb31° / 26°379.411.84.5
Mar31° / 26°6615.7123.8
Apr31° / 26°9117.612.13.6
May30° / 25°16624.612.33.2
Jun28° / 24°21525.712.43.5
Jul27° / 24°1262112.34.6
Aug27° / 23°961712.25.1
Sep28° / 24°14122.7124.1
Oct29° / 24°15025.211.93.6
Nov30° / 25°741911.73.9
Dec30° / 25°339.211.65.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 84%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11387
21387
31387
41387
51387
61387
71486
81486
91585
101585
111585
121585
131585
141585
151585
161585
171684
181684
191684
201684
211783
221882
231882
241882
251981
261981
272080
282179
292179
302179

Chance of precipitation in September

Any precipitation

Abomey-Calavi gets around 141 mm of rain over 22.7 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 75% 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 (%)
170
271
372
473
573
674
775
875
975
1076
1176
1276
1376
1476
1576
1676
1776
1876
1976
2076
2176
2276
2376
2476
2576
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 99% 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
101000
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24982
25982
26982
27982
28982
29973
30973

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 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
512light breeze
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2710calm
2810calm
2910calm
3010calm

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 6:47 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)
112.16:476:54
212.16:466:54
312.16:466:53
412.16:466:52
512.16:466:52
612.16:466:51
712.16:466:51
812.16:456:50
912.16:456:50
1012.16:456:49
1112.16:456:49
1212.16:456:48
1312.16:446:48
1412.06:446:47
1512.06:446:47
1612.06:446:46
1712.06:446:45
1812.06:436:45
1912.06:436:44
2012.06:436:44
2112.06:436:43
2212.06:436:43
2312.06:436:42
2412.06:426:42
2512.06:426:41
2612.06:426:40
2712.06:426:40
2812.06:426:39
2912.06:426:39
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 4.35 kWh/m².

For context, solar energy here swings from a low near 4.09 kWh/m² to a high of 5.45 kWh/m² in February across the year — September's 4.35 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Abomey-Calavi

In seasonPeak

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

Abomey-Calavi 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 Abomey-Calavi?

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

4.1
Sightseeing
6th-best month of the year
4.6
Beach & pool
10th-best month of the year

September is a reasonable time to visit Abomey-Calavi for sightseeing.

What to pack for Abomey-Calavi in September

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

In September, Abomey-Calavi sees daytime highs around 28°C and nights near 24°C. Pack light clothes and rain gear. About 23 days see rain.

light clothesrain gear

Sea temperature near Abomey-Calavi 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 Abomey-Calavi 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 Abomey-Calavi 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 Abomey-Calavi 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 Abomey-Calavi 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 Abomey-Calavi?

Abomey-Calavi sits at 6.4°N, 2.4°E, 11 m above sea level, in Benin. The nearest listed city is Ganvié, 4.0 km away.

Topography around Abomey-Calavi

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

Within 3 km, the terrain around Abomey-Calavi has only modest variations in elevation — a maximum elevation change of 32 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 60 m; within 80 km, only modest variations in elevation — a maximum elevation change of 184 m.

The land around Abomey-Calavi is covered by artificial surfaces (49%) and water (32%) within 3 km, artificial surfaces (28%) and water (28%) within 16 km, and trees (38%) and water (32%) within 80 km.

3 km
32 m
16 km
60 m
80 km
184 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Ganvié 4.0 km · Godomè 7.0 km · Cotonou 12 km · Zinvié 19 km · Ekpé 21 km · Porto-Novo 28 km · Missérété 29 km · Semi 30 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 Abomey-Calavi (6.4485°, 2.3557°, elevation 11 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).