French Guiana weather in October 2025

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

Daytime temperatures usually reach 32°C in Cayenne, French Guiana in October with very high heat and humidity, falling to 23°C at night.

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

There are normally 8 hours of bright sunshine each day in Cayenne, French Guiana in October - that's 70% of daylight hours.

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

The average sea temperature around Cayenne, French Guiana in October is 28°C.

Q: Does it rain in French Guiana in October?

There are usually 4 days with some rain in Cayenne, French Guiana in October and the average monthly rainfall is 46mm.

Expect 90°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in French Guiana in October. Check more long-term weather averages for French Guiana in October before you book your next holiday to French Guiana in 2025/2026.

90
90°F max day temperature
8
8 hours of sunshine per day
4
4 days with some rainfall
73
73°F min night temperature
12
12 hours of daylight per day
VH
Very High heat & humidity
1.8
1.8 inches of monthly rainfall
11
11+ (Extreme) UV index
82
82°F sea temperature

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The October 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) | Imperial (°F)

How hot is it in French Guiana in October?

Daytime temperatures usually reach 90°F in Cayenne, French Guiana in October with very high heat and humidity, falling to 73°F at night.

How sunny is it in French Guiana in October?

There are normally 8 hours of bright sunshine each day in Cayenne, French Guiana in October - that's 70% of daylight hours.

How warm is the sea around French Guiana in October?

The average sea temperature around Cayenne, French Guiana in October is 82°F.

Does it rain in French Guiana in October?

There are usually 4 days with some rain in Cayenne, French Guiana in October and the average monthly rainfall is 1.8 inches.

French Guiana October sunrise & sunset times

Browse the sunrise and sunset times for French Guiana in October 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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