Discover French Guiana
Very few tourists make it to this small South American country. It's a shame, because nature in French Guiana is still pure and unspoiled.
Kourou Weather in September
Kourou in September averages 31°C (88°F) during the day and 25°C (77°F) at night. This is the driest month of the year.
Rainfall in Kourou in September
This is the driest month, making it a great choice for planning outdoor excursions. Expect around 5 days of rain based on historical data, with 54 mm (2.1 in) average. Showers tend to be short but heavy rather than persistent drizzle. When it rains, it usually means it, but it doesn't last long.
Temperature in Kourou in September
In September, Kourou sees very high temperatures, with highs of 31°C (88°F). Nights drop to around 25°C (77°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. Nights stay warm at around 25°C (77°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Kourou in September
There are approximately 255 hours of sunshine this month, resulting in mostly clear days.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Kourou.
Kourou Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
31°C (88°F)
Chance of Rain
16%
Precipitation
54 mm (2.1 in)
Rainy days
5 days
Sunshine
255 hours *
Percentage Sunshine
*
* Data from: Cayenne, French Guiana (42 KM, 26 Miles).
Kourou Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kourou - and find the best time to visit.
Daily Historical Temperatures
46-year average (1976-2025)
Based on our historical records, temperatures in Kourou typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 23°C (73°F).
Average temperatures in September
Daily Historical Precipitation
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Kourou in September
Browse day-by-day weather records for Kourou spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kourou historical weather extremes in September
Our historical data for Kourou spans 1992 to 2026, revealing these weather extremes.
- On September 12, 1995, temperatures climbed to 36°C (97°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 26°C (79°F), recorded on September 26, 1999.
- The coldest night in September in Kourou was on September 11, 1997, with a minimum of 20°C (68°F).
Best Places in French Guiana in September
Find out more about the weather in French Guiana and which places have the best travel conditions in this month. See all of French Guiana in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Kourou in September
Warm but pleasant conditions in Kourou in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Kourou in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming10/10 -
Cycling8/10 -
Walking8/10 -
Barbeque10/10 -
Camping8/10 -
Outdoor sports8/10
Kourou 3-Day Forecast
More climate data for Kourou
See the full Kourou climate overview or explore weather in French Guiana.
Popular in September
Where to go in September - average daytime high across popular destinations.
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