The month in detail
What to expect in September
In September, Cotonou sees 81°F during the day with 5.2h of sunshine per day. With 47% of rainy days, always have indoor alternatives planned.
September ranks 10 out of 12 months in Cotonou. Compared to August: +2°F daytime, 18 pts more rainy days.
This month's conditions
What it's like in September
UV index
8 · high
sunscreen and hat advised
Feels like
very humid
23°
Sea
26°C
warm, ideal
Daylight
12.0h of daylight
Air quality
excellent
AQI 18
Compare
Is September the right month?
The best month in Cotonou is December (6.0/10), 0.9 pt higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Cotonou
Expedia →
Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Cotonou
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.
Country · Benin
🗣️LanguageFrench
💶CurrencyFranc CFA (CFA)
🚗DrivingRight-hand
🛡️Safety ⓘSafe · 2/5
💰Cost of living ⓘVery cheap · 1/5
🌡️ Climate
🌍Climate typeEquatorial tropical
📈Climate trend ⓘStable
🔥Hottest monthFebruary · 88°F
❄️Coolest monthAugust · 79°F
🌧️Rainiest month ⓘJune · 60%
🏝️ Tropical stay
🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘNone (equator)
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is Cotonou ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
BeninEquatorial tropical climate with a 6.0 → 4.9 gap between best and worst month. 10 years of ERA5 data to choose by project.
6.37°N · 2.39°E
Questions
Frequently asked questions
What is the best time to visit Cotonou?
December is the best month with 86°F highs, 79°F lows, 7.1h of sunshine and 3.0% rainy days.
How many hours of sunshine does Cotonou get in December?
Cotonou averages 7.1 sunshine hours per day in December. It is the sunniest month with a climate score of 6.0/10.
What is the rainiest month in Cotonou?
June is the most unfavourable month with June has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Cotonou in December?
In December, overnight lows reach 79°F, while afternoon highs average 86°F.
Is Cotonou good in winter?
In winter (December-February), Cotonou scores 5.8/10 on average — Acceptable conditions for cultural visits.. The best month overall remains December with a score of 6.0/10.
When should you avoid Cotonou?
June is the most difficult month to visit Cotonou, with June has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Cotonou in September?
In September, the sea averages 80°F in Cotonou: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Cotonou in September?
The average UV index reaches 8 in September in Cotonou (high), with about 12.0h of daylight. Sunscreen and hat advised.