Similar Climates › City Pairings › Cotonou ≈ Rio de Janeiro
City Pairings
fair match
Cotonou, Benin and Rio de Janeiro, Brazil are a fair climate match — 5,929 km (3,684 mi) apart. Cotonou is Köppen zone Aw; Rio de Janeiro is Aw.
See Cotonou on the interactive map →Cotonou and Rio de Janeiro both sit in the tropical savanna (Aw) zone, so their seasonal arcs line up. They are about 5,929 km (3,684 mi) apart, so Rio de Janeiro is a reachable stand-in when you want Cotonou’s weather elsewhere.
It is a fair match — close on the main numbers, with a few seasonal quirks between Cotonou and Rio de Janeiro. July by 4°C (Rio de Janeiro cooler); January means differ by 0°C (Rio de Janeiro cooler). Rainfall shifts more: Rio de Janeiro is 122 mm wetter in January, and 79 mm drier in July.
Sunshine stays close: Rio de Janeiro at 9.8 h/day on average versus 9.9 h/day in Cotonou (January 10.5 h / 10.3 h, July 9 h / 9.4 h). Air quality: mean PM2.5 is 21 µg/m³ in Rio de Janeiro vs 28 in Cotonou (lower by 7 µg/m³). Humidity: dew point in Rio de Janeiro runs about 6°C lower in July (17°C vs 23°C), so the air feels drier.
January & July · °C and mm
Compare Cotonou and Rio de Janeiro month by month on the interactive map →
See Rio de Janeiro's climate twin on its own page.
On Similar Climates, Rio de Janeiro, Brazil is the closest distant match for Cotonou, Benin — scored fair, about 5,929 km (3,684 mi) away.
Cotonou and Rio de Janeiro are separated by roughly 5,929 km (3,684 mi) on the great-circle route.
Yes — both cities are in the same hemisphere, so summer and winter fall in the same calendar months.
Yes — both are tropical savanna (Aw).
Cotonou has a tropical savanna climate (Aw). January averages a high of 31°C and a low of 24°C with 15 mm of rain; July averages 28°C / 23°C and 120 mm.
Cotonou averages about 10.3 hours of sunshine a day in January and 9.4 hours in July.
January PM2.5 averages about 46.5 µg/m³ (US AQI 116); July averages 9.3 µg/m³ (US AQI 49).
Other close climate matches for Cotonou: Mombasa (fair), Cartagena (loose), Panama City (fair).
All tropical savanna (Aw) cities on Similar Climates →
Explore Cotonou and Rio de Janeiro on the interactive map →