French Guiana weather in March 2025

Q: How hot is it in French Guiana in March?

Daytime temperatures usually reach 29°C in Cayenne, French Guiana in March with high heat and humidity, falling to 23°C at night.

Q: How sunny is it in French Guiana in March?

There are normally 5 hours of bright sunshine each day in Cayenne, French Guiana in March - that's 37% of daylight hours.

Q: How warm is the sea around French Guiana in March?

The average sea temperature around Cayenne, French Guiana in March is 27°C.

Q: Does it rain in French Guiana in March?

There are usually 22 days with some rain in Cayenne, French Guiana in March and the average monthly rainfall is 374mm.

Expect 29°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in French Guiana in March. Check more long-term weather averages for French Guiana in March before you book your next holiday to French Guiana in 2025/2026.

29
29°C max day temperature
5
5 hours of sunshine per day
22
22 days with some rainfall
23
23°C min night temperature
12
12 hours of daylight per day
H
High heat & humidity
374
374 mm of monthly rainfall
11
11+ (Extreme) UV index
27
27°C sea temperature

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The March weather guide for French Guiana, represented by Cayenne, (Cayenne) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

How hot is it in French Guiana in March?

Daytime temperatures usually reach 29°C in Cayenne, French Guiana in March with high heat and humidity, falling to 23°C at night.

How sunny is it in French Guiana in March?

There are normally 5 hours of bright sunshine each day in Cayenne, French Guiana in March - that's 37% of daylight hours.

How warm is the sea around French Guiana in March?

The average sea temperature around Cayenne, French Guiana in March is 27°C.

Does it rain in French Guiana in March?

There are usually 22 days with some rain in Cayenne, French Guiana in March and the average monthly rainfall is 374mm.

French Guiana March sunrise & sunset times

Browse the sunrise and sunset times for French Guiana in March 2025. Select a month to view French Guiana sunrise and sunset times for the next 12 months. The French Guiana sunrise and sunset times shown below are for Cayenne.

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