Kourou Weather in September
What's the weather like in Kourou (Guyane) in September 2025?
The climate in Kourou during September can be summarized as hot, humid and reasonably dry.
September is in the fall / autumn in Kourou and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a steamy 33°C (91°F), whilst at night 23°C (73°F) is normal.
| Daytime temperature | 32.5°C 90.5°F |
|---|---|
| Nightly temperature | 22.7°C 72.9°F |
| Average temperature | 27.6°C 81.7°F |
| Daily sunshine | 8.8 hrs |
| Avg rainfall | 46 mm 1.8 ins |
| Rainy days | 5 days |
| Sea temperature | 28.3°C 82.9°F |
| Humidity | 80% |
| Windspeed | 5.8kph 4 mph |
On average September is the driest month of the year in Kourou with around 46mm 1.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.8 hours of sunshine per day.
September temperatures in Kourou
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Kourou in September 2025.
Other monthly averages
Best places to visit in September
Kourou weather stats
| Hottest month: | September | 32.3°C 90.1°F |
|---|---|---|
| Driest month: | September | 46mm 1.8ins |
| Sunniest month: | October | 8.8hrs |
| Coldest month: | January | 28.8°C 83.8°F |
| Wettest month: | May | 473mm 18.6ins |
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