Average weather for French Guiana 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.
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. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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.
French Guiana in September |
New York | ||
|---|---|---|---|
 Average temperature |
33°C | 27°C | |
 Max. temperature |
34°C | 31°C | |
| Min. temperature |
33°C | -5°C | |
 Total precipitation |
78 mm | 57 mm | |
| Rainy days |
8 days | 9 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 good month to be in French Guiana for sunny weather. You’ll have high temperatures and not too much rain.
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.
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.
Daily Temperature in September in French Guiana
This chart shows the average daily high and low temperatures in September for French Guiana, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for 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 millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 8 days of precipitation 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 few years.
Total precipitation in September in French Guiana over the years
This chart shows the average precipitation in September in French Guiana, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
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.
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.
Or check out the climate of French Guiana for all months at once
