French Guiana weather

Our guide to the weather in French Guiana during May

28

Average high

6

UV Index

637mm

Monthly rainfall

86%

Humidity

We've looked at the most up-to-date weather data for French Guiana, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about French Guiana weather in May.

How warm is it in French Guiana during May?

The temperature is extremely stable in May with average highs of 28℃ and lows just 4℃ lower at 24℃. Of course, the high humidity will make it feel even hotter. The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.

Does it rain in French Guiana during May?

May is typically the wettest month in French Guiana. On average, there will be 21 rainy days during the month, amounting to 636.8mm in total. That's a lot of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. There's a good chance that you'll catch a thunderstorm during your trip.

Is it windy in French Guiana during May?

You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in May. The high humidity and warm temperature will make the breeze feel warm, so any cooling effect will be limted.

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Weather in French Guiana

Our month-by-month guide to the weather and climate in French Guiana

27.8

French Guiana weather in

January
27.3

French Guiana weather in

February
27.9

French Guiana weather in

March
28.1

French Guiana weather in

April
28.3

French Guiana weather in

May
28.8

French Guiana weather in

June
29.6

French Guiana weather in

July
30.8

French Guiana weather in

August
31.7

French Guiana weather in

September
31.6

French Guiana weather in

October
30.5

French Guiana weather in

November
28.5

French Guiana weather in

December