Temperatures in September
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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for French Guiana in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in French Guiana with hot temperatures, averaging around 33°C during the day and nights close to 23°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Mid-September
By mid-September, the average daytime temperature rises to around 34°C, with nights close to 24°C. There might be a few showers during this period, but plenty of dry days with sunshine too. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
End of September
By the end of September, the average daytime temperature in French Guiana will be around 34°C, with nights close to 24°C. A shower might show up, but overall the weather will be dry and sunny. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
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Precipitation in September
In September, there is an average of 78 mm of precipitation, spread over 8 days. The wind speed is around 4 Bft, mostly coming from the East.
The average precipitation chance is 27% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for French Guiana. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
French Guiana in September |
UK | ||
|---|---|---|---|
 Average Temperature |
33°C | 20°C | |
 High Temp |
34°C | 22°C | |
| Low Temp |
33°C | 17°C | |
 Total Precipitation |
78 mm | 44 mm | |
| Rainy Days |
8 days | 8 days | |
August
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.
Is September a good time to visit French Guiana?
September is a great month to be in French Guiana for sunny weather. You’ll get high temperatures and not too much rain this month.
Temperature records for French Guiana in September
With 38°C, French Guiana hit the highest temperature in the last 10 years in September 2023. The lowest daytime temperature in this month was 30°C in 2017. The extreme night temperatures ranged from a low of 18°C to a high of 26°C.
Check out the climate of French Guiana for all months and discover the best travel time
The climate of French Guiana is based on weather data from Cayenne. Other locations might have different weather. You can check out all destinations in French Guiana for a full picture of the climate.
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Daily Temperature in September in French Guiana
This chart shows the average daily temperatures, both day and night, for each day in September in French Guiana, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Weather experiences in September in French Guiana
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Expect lots of rain; The sky is full of threatening clouds. ... more
Daily Precipitation in September in French Guiana
The chart below shows the average daily precipitation in September for French Guiana, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 8 days of rain in French Guiana.
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.
Temperature in September in French Guiana Over the Years
This chart shows the average temperature in September in French Guiana, measured in degrees Celsius, over the past years.
Total Precipitation in September in French Guiana Over the Years
This chart shows the average precipitation in September in French Guiana, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for French Guiana
Click on a specific day in September for detailed info on the typical weather on that day in French Guiana. Check out the historical temperatures and precipitation over the past 10 years on this day.
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 might 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.
Or check out the climate of French Guiana for all months at once
