French Guiana weather in September 2024

Expect 32°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in French Guiana in September. Check more long-term weather averages for French Guiana in September before you book your next holiday to French Guiana in 2024/2025.

  • 32°C maximum daytime temperature in September in French Guiana (Cayenne)32
    32°C max day temperature
  • 8 hours of sunshine per day
  • 4 days with some rainfall in September in French Guiana (Cayenne)4
    4 days with some rainfall
  • 23°C minimum night-time temperature in September in French Guiana (Cayenne)23
    23°C min night temperature
  • 12 hours of daylight per day in September in French Guiana (Cayenne)12
    12 hours of daylight per day
  • Very high heat & humidity in September in French Guiana (Cayenne)VH
    Very High heat & humidity
  • 40 mm monthly rainfall in September in French Guiana (Cayenne)40
    40 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in French Guiana (Cayenne)11
    11+ (Extreme) UV index
  • 28°C sea temperature in September in French Guiana (Cayenne)28
    28°C sea temperature

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The September 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 September?

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

How sunny is it in French Guiana in September?

There are normally 8 hours of bright sunshine each day in Cayenne, French Guiana in September - that's 68% of daylight hours.

How warm is the sea around French Guiana in September?

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

Does it rain in French Guiana in September?

There are usually 4 days with some rain in Cayenne, French Guiana in September and the average monthly rainfall is 40mm.

French Guiana September sunrise & sunset times

Browse the sunrise and sunset times for French Guiana in September 2024. 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
Sunday, 1st September 2024 06:23 18:35
Sunday, 15th September 2024 06:20 18:28
Monday, 30th September 2024 06:17 18:21

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