Cayenne
French Guiana
Long-term weather forecast
Long-term weather forecast
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Monthly weather forecast and Climate
Cayenne, French Guiana

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Palm trees in a botanical garden in Cayenne, French Guiana, overlooking green fields under clear skies
Palm trees in a botanical garden in Cayenne, French Guiana, overlooking green fields under clear skies
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Best months for swimming (with the highest average sea temperature) are May, June, July, August, September, October and November (28°C).
Coldest months (with the lowest average sea temperature) are January, February, March, April and December (27°C).

Months with the longest days are January, February, March, April, May, June, July, August, September, October, November and December (Average daylight: 12h).
Months with shortest days are January, February, March, April, May, June, July, August, September, October, November and December (Average daylight: 12h).

The month with most sunshine is September (Average sunshine: 8.5h).
The month with least sunshine is January (Average sunshine: 3h).

Months with the highest UV index are January, February, March, April, May, June, August, September, October and November (UV index 12).
Months with the lowest UV index are July and December (UV index 11).

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