Climate guide for Cotonou, Benin

Best Time to Visit
Cotonou

How to read the score (0–10)
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About Cotonou

Cotonou is a sightseeing destination in Benin. Plan around the drier months outside peak monsoon for more reliable conditions, then drill into monthly scores when you need finer timing for sightseeing travel. Use the monthly scores to plan walking and sightseeing days around heat, rainfall, humidity and daylight.

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Travel Tips

Timing & weather
Check Cotonou's monthly climate scores before locking flights - tropical patterns shift comfort for sightseeing trips across the year.
Getting around
In Cotonou, pair a walkable core day with one transit or transfer buffer - crowds and traffic vary by season in Benin.
Tickets & access
Reserve popular museums and day trips from Cotonou ahead in peak months; shoulder seasons are more flexible.
Pack for the profile
Comfortable walking shoes and a day bag matter more than formal wear for most Cotonou sightseeing days.

Things to do in Cotonou

Cotonou, Benin. Live activities and tours from GetYourGuide, matched to this destination.

When to visit Cotonou: the short answer

The best time to visit Cotonou is December, followed by January, February. Those months combine the most usable temperatures with the fewest lost days to rain: December averages 26°C with 14 mm of rain and about 22 sunny days. The months to avoid unless you have a specific reason are June, October. If budget matters more than perfect weather, May is the strongest of the low-rate months at 4.2/10.

Across the year Cotonou swings from 25°C in August to 28°C in March, a 3-degree spread, while rainfall ranges from 14 mm in December to 246 mm in June. That is the whole planning problem in one sentence: Cotonou is not equally good year-round, and the difference between the best and worst month here is 4.1 points on a 10-point scale.

Warmest month: March (28°C). Coolest: August (25°C). Driest: December (14 mm). Wettest: June (246 mm).

Cotonou month by month

January in Cotonou — reliably good (2nd best month)

Good · 7.3/10

January averages 27°C (80°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

Rain is a non-issue at 14 mm for the month, with about 21 sunny days and 11.7 hours of daylight to work with.

It scores 7.3/10 here, 2nd of 12 months, against 7.6/10 in the destination's best month.

Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.

February in Cotonou — workable with trade-offs

Trade-offs · 6.8/10

February averages 28°C (82°F) with humidity around 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

Expect 27 mm of rain — occasional showers rather than washed-out days — alongside about 19 sunny days and 11.8 daylight hours.

It scores 6.8/10 here, 3rd of 12 months, against 7.6/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.

March in Cotonou — workable with trade-offs

Trade-offs · 5.4/10

March averages 28°C (82°F) with humidity around 85%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

Rainfall runs 83 mm, so plan one flexible day in three; you still get about 22 sunny days and 12 hours of daylight.

It scores 5.4/10 here, 6th of 12 months, against 7.6/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.

If your dates are flexible, December is materially better in Cotonou — 2.2 points higher on the same scale.

April in Cotonou — the hardest end of the year

Hardest · 3.9/10

April averages 28°C (82°F) with humidity around 86%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

At 164 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.

It scores 3.9/10 here, 10th of 12 months, against 7.6/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

If your dates are flexible, December is materially better in Cotonou — 3.7 points higher on the same scale.

May in Cotonou — the hardest end of the year

Hardest · 4.2/10

May averages 28°C (82°F) with humidity around 86%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

At 145 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.

It scores 4.2/10 here, 8th of 12 months, against 7.6/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

If your dates are flexible, December is materially better in Cotonou — 3.4 points higher on the same scale.

June in Cotonou — the hardest end of the year

Hardest · 3.5/10

June averages 26°C (80°F) with humidity around 88%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

246 mm of rain puts this in monsoon territory — about 13 sunny days across the whole month, and multi-day washouts are normal.

It scores 3.5/10 here, 12th of 12 months, against 7.6/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

If your dates are flexible, December is materially better in Cotonou — 4.1 points higher on the same scale.

July in Cotonou — the hardest end of the year

Hardest · 4.4/10

July averages 26°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

At 152 mm this is a genuinely wet month: about 12 sunny days in total, and outdoor plans need an indoor fallback.

It scores 4.4/10 here, 7th of 12 months, against 7.6/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.

If your dates are flexible, December is materially better in Cotonou — 3.2 points higher on the same scale.

August in Cotonou — workable with trade-offs

Trade-offs · 5.6/10

August averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Rainfall runs 99 mm, so plan one flexible day in three; you still get about 13 sunny days and 12.2 hours of daylight.

It scores 5.6/10 here, 5th of 12 months, against 7.6/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack light clothing, swimwear and real sun protection, a packable rain layer.

If your dates are flexible, December is materially better in Cotonou — 2 points higher on the same scale.

September in Cotonou — the hardest end of the year

Hardest · 4.1/10

September averages 26°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

207 mm of rain puts this in monsoon territory — about 15 sunny days across the whole month, and multi-day washouts are normal.

It scores 4.1/10 here, 9th of 12 months, against 7.6/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.

If your dates are flexible, December is materially better in Cotonou — 3.5 points higher on the same scale.

October in Cotonou — the hardest end of the year

Hardest · 3.9/10

October averages 27°C (80°F) with humidity around 88%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

226 mm of rain puts this in monsoon territory — about 18 sunny days across the whole month, and multi-day washouts are normal.

It scores 3.9/10 here, 11th of 12 months, against 7.6/10 in the destination's best month.

Expect low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

If your dates are flexible, December is materially better in Cotonou — 3.7 points higher on the same scale.

November in Cotonou — workable with trade-offs

Trade-offs · 6/10

November averages 27°C (81°F) with humidity around 84%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

Rainfall runs 69 mm, so plan one flexible day in three; you still get about 21 sunny days and 11.7 hours of daylight.

It scores 6/10 here, 4th of 12 months, against 7.6/10 in the destination's best month.

Expect mid-season pricing, and crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.

If your dates are flexible, December is materially better in Cotonou — 1.6 points higher on the same scale.

December in Cotonou — the year's strongest window

Best window · 7.6/10

December averages 26°C (80°F) with humidity around 76%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

Rain is a non-issue at 14 mm for the month, with about 22 sunny days and 11.6 hours of daylight to work with.

On our climate-comfort scale this is the top-ranked month of the year for Cotonou at 7.6/10 — the reference point every other month on this page is measured against.

Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.

Frequently asked

When is the best time to visit Cotonou, Benin?
In Ideal Weather mode, the best months to visit Cotonou are December, January. December is the single peak month with an Ideal Weather score of 7.6/10 based on temperature, rainfall, humidity, daylight and historical sunny days.
What is the weather like in Cotonou year-round?
Cotonou has a climate profile suited to sightseeing and cultural travel. Average monthly temperatures range from 25°C in August to 28°C in March, with Ideal Weather scores between 3.5 and 7.6 out of 10.
Which months should I avoid in Cotonou?
The lowest Ideal Weather-scoring months in Cotonou are June (3.5/10), April (3.9/10), October (3.9/10). These months typically combine less comfortable temperatures, higher rainfall or fewer sunny days.
When is the rainy season in Cotonou?
June is the wettest month in Cotonou, averaging about 246 mm of rainfall. December is the driest, at roughly 14 mm.
Which is the sunniest month in Cotonou?
March sees the most sun in Cotonou, with about 22 sunny days on average - ideal for outdoor plans.
Is Cotonou a good destination for sightseeing and cultural travel?
Cotonou is well suited to sightseeing and cultural travel. Its highest Ideal Weather window (December, January) aligns with the conditions travelers usually look for in this style of trip.
How is the bestime.to score for Cotonou calculated?
Each month receives an Ideal Weather score from 0-10 using ERA5 climate normals for Cotonou: temperature comfort, precipitation, humidity, daylight hours, and historical sunny days - weighted for sightseeing and cultural travel.

Explore by month

Curated in Cotonou

Tickets & experiences