The weather in September in French Guiana
It's hot in September in French Guiana with an average temperature of 33°C. Temperatures this month range from a low of 33°C to a high of 34°C. At night, you can expect temperatures between 23°C and 24°C.
September is a good month to be in French Guiana for sunny weather. You’ll have high temperatures and not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for French Guiana. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 38°C in 2023, French Guiana reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 30°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of 18°C to a highest value of 26°C.
Rainfall amount
In September, there is an average of 78 mm of precipitation, spread over 11 days. The wind speed is around 4 Bft, mostly coming from the East.
Daily weather in September for French Guiana
Click on any day in September to get detailed info about the usual weather on that day in French Guiana. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| French Guiana | New York | |
|---|---|---|
| Average temperature | 33°C | 27°C |
| Max. temperature | 34°C | 31°C |
| Min. temperature | 23°C | -5°C |
| Total precipitation | 78 mm | 57 mm |
| Rainy days | 11 days | 9 days |
Start of September
The month of September starts in French Guiana with hot temps, averaging around 33°C during the day and nights around 23°C.
Mid September
By mid-September, daytime temps rise to around 34°C, with nights around 24°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in French Guiana is around 34°C, while nighttime temps are about 24°C. A shower might pop up, but overall, the weather will be dry and sunny.
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UV index
The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of French Guiana for all months and discover the best travel time
The climate in French Guiana is based on weather data from Cayenne. Other spots might have different weather. You can check out all destinations in French Guiana to get the full picture of the climate.
Temperature charts
These charts show the average temperatures in September in French Guiana. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in French Guiana
Temperature in September in French Guiana over the years
Precipitation charts
These charts show the average amount of precipitation in September in French Guiana. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in French Guiana
Total precipitation in September in French Guiana over the years
Daily UV index in September in French Guiana
This chart shows the average daily UV index in September in French Guiana, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in French Guiana
The weather in September in French Guiana is rated 3 out of 5 stars by 1 visitor. Have you been to French Guiana? Share your weather experience to help other visitors.
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Expect lots of rain; The sky is full of threatening clouds. You may feel the tropical heat. Bring light clothing.— This text is automatically translated to English
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Average weather in French Guiana by month
Click on a month below to see detailed weather info for French Guiana. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.