French Guiana weather in January 2025

Expect 29°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in French Guiana in January. Check more long-term weather averages for French Guiana in January before you book your next holiday to French Guiana in 2025/2026.

  • 29°C maximum daytime temperature in January in French Guiana (Cayenne)29
    29°C max day temperature
  • 4 hours of sunshine per day
  • 20 days with some rainfall in January in French Guiana (Cayenne)20
    20 days with some rainfall
  • 23°C minimum night-time temperature in January in French Guiana (Cayenne)23
    23°C min night temperature
  • 12 hours of daylight per day in January in French Guiana (Cayenne)12
    12 hours of daylight per day
  • High heat & humidity in January in French Guiana (Cayenne)H
    High heat & humidity
  • 367 mm monthly rainfall in January in French Guiana (Cayenne)367
    367 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in January in French Guiana (Cayenne)11
    11+ (Extreme) UV index
  • 27°C sea temperature in January in French Guiana (Cayenne)27
    27°C sea temperature

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The January 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)

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How hot is it in French Guiana in January?

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

How sunny is it in French Guiana in January?

There are normally 4 hours of bright sunshine each day in Cayenne, French Guiana in January - that's 34% of daylight hours.

How warm is the sea around French Guiana in January?

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

Does it rain in French Guiana in January?

There are usually 20 days with some rain in Cayenne, French Guiana in January and the average monthly rainfall is 367mm.

French Guiana January sunrise & sunset times

Browse the sunrise and sunset times for French Guiana in January 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.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st January 2025 06:38 18:28
Thursday, 16th January 2025 06:43 18:35
Friday, 31st January 2025 06:45 18:40

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