French Guiana weather live forecast

Today's maximum temperature in French Guiana is expected to be 88°F. Select a day from the live weather forecast for French Guiana (Cayenne) for more weather parameters.

Wednesday
17th Sep
88

81

8

11
Thursday
18th Sep
84

81

8

10
Friday
19th Sep
86

79

8

11
Saturday
20th Sep
84

79

4

10
Sunday
21st Sep
88

79

8

11

5-day weather forecast updated at 04:00 on Wednesday 17th September 2025 GMT

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The 5-day weather forecast for French Guiana, represented by Cayenne, (Cayenne) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

French Guiana weather forecast by day

Below are the detailed weather forecasts for French Guiana for the next 5 days. The forecasts shown are for Cayenne and may not represent the whole of French Guiana. Browse more destinations in French Guiana to view more weather forecasts.

French Guiana weather for Wednesday 17th September 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 12% chance of some rain and a gentle breeze of 9 mph from the east.

88
°F maximum temperature
81
°F minimum temperature
isolated thunderstorms
8
hours of sunshine
11
UV index (Extreme)
12
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
9
mph wind from E

French Guiana weather for Thursday 18th September 2025

Expect scattered clouds in French Guiana with a maximum temperature of 84°F, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the east.

84
°F maximum temperature
81
°F minimum temperature
scattered clouds
8
hours of sunshine
10
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
11
mph wind from E

French Guiana weather for Friday 19th September 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 27% chance of some rain and a gentle breeze of 9 mph from the east.

86
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
8
hours of sunshine
11
UV index (Extreme)
27
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
9
mph wind from E

French Guiana weather for Saturday 20th September 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 84°F, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 44% chance of some rain and a light breeze of 7 mph from the east.

84
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
4
hours of sunshine
10
UV index (Very High)
44
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
7
mph wind from E

French Guiana weather for Sunday 21st September 2025

Expect scattered clouds in French Guiana with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the east.