French Guiana weather in July 2025

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

Daytime temperatures usually reach 31°C in Cayenne, French Guiana in July with very high heat and humidity, falling to 23°C at night.

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

There are normally 7 hours of bright sunshine each day in Cayenne, French Guiana in July - that's 56% of daylight hours.

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

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

Q: Does it rain in French Guiana in July?

There are usually 18 days with some rain in Cayenne, French Guiana in July and the average monthly rainfall is 200mm.

Expect daytime maximum temperatures of 31°C in French Guiana in July and very high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 18 days with some rainfall and typically 200 mm of rainfall in the month.

31
31°C max day temperature
7
7 hours of sunshine per day
18
18 days with some rainfall
23
23°C min night temperature
12
12 hours of daylight per day
VH
Very High heat & humidity
200
200 mm of monthly rainfall
11
11 (Extreme) UV index
28
28°C sea temperature

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The July 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 July?

Daytime temperatures usually reach 31°C in Cayenne, French Guiana in July with very high heat and humidity, falling to 23°C at night.

How sunny is it in French Guiana in July?

There are normally 7 hours of bright sunshine each day in Cayenne, French Guiana in July - that's 56% of daylight hours.

How warm is the sea around French Guiana in July?

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

Does it rain in French Guiana in July?

There are usually 18 days with some rain in Cayenne, French Guiana in July and the average monthly rainfall is 200mm.

French Guiana July sunrise & sunset times

Browse the sunrise and sunset times for French Guiana in July 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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