French Guiana weather live forecast

Today's maximum temperature in French Guiana is expected to be 28°C. Select a day from the live weather forecast for French Guiana (Cayenne) for more weather parameters.

Thursday
18th Dec
28

26

3

7
Friday
19th Dec
28

25

3

9
Saturday
20th Dec
28

25

1

6
Sunday
21st Dec
27

25

3

9
Monday
22nd Dec
28

25

3

11

5-day weather forecast updated at 04:00 on Thursday 18th December 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 Thursday 18th December 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 74% chance of some rain and a gentle breeze of 13 kph from the north-east.

28
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
7
UV index (High)
74
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
13
kph wind from NE

French Guiana weather for Friday 19th December 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 78% chance of some rain and a light breeze of 11 kph from the north-east.

28
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
9
UV index (Very High)
78
% chance of some rain
<20
mm of rainfall expected
L
low heat & humidity
11
kph wind from NE

French Guiana weather for Saturday 20th December 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 6 (High) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 72% chance of some rain and a light breeze of 8 kph from the east.

28
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
6
UV index (High)
72
% chance of some rain
<20
mm of rainfall expected
L
low heat & humidity
8
kph wind from E

French Guiana weather for Sunday 21st December 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 80% chance of some rain and a light breeze of 9 kph from the north-east.

27
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
9
UV index (Very High)
80
% chance of some rain
<10
mm of rainfall expected
L
low heat & humidity
9
kph wind from NE

French Guiana weather for Monday 22nd December 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 11 (Extreme) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 87% chance of some rain and a light breeze of 10 kph from the east.