The month in detail
What to expect in September
In September, French Guiana sees 30°C during the day with 7.5h of sunshine per day. Rain risk remains low (21% of days), leaving good room for outdoor activities.
September is the best month of the year in French Guiana. Compared to August: 24 pts fewer rainy days, +0.6h of sun per day.
This month's conditions
What it's like in September
UV index
9 · very high
protection essential
Feels like
very humid
23°
Sea
31°C
warm, ideal
Daylight
12.0h of daylight
Air quality
excellent
AQI 17
Compare
Is September the right month?
September is actually the best month of the year in French Guiana. Good timing.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · French Guiana
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · French Guiana
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.
Country · French Guiana
🗣️LanguageFrench
💶CurrencyEuro (€)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5
🌡️ Climate
🌍Climate typeEquatorial tropical
📈Climate trend ⓘStable
🔥Hottest monthAugust · 30°C
❄️Coolest monthJanuary · 28°C
🌧️Rainiest month ⓘMay · 86%
🏝️ Tropical stay
🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘNone (equator)
🛂VisaSchengen · 90 days
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is French Guiana ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
French GuianaEquatorial tropical climate with a 5.8 → 4.3 gap between best and worst month. 10 years of ERA5 data to choose by project.
4.94°N · 52.33°W
Questions
Frequently asked questions
What is the best time to visit French Guiana?
September is the best month with 30.0°C highs, 25.0°C lows, 7.5h of sunshine and 21.0% rainy days.
How many hours of sunshine does French Guiana get in September?
French Guiana averages 7.5 sunshine hours per day in September. It is the sunniest month with a climate score of 5.6/10.
What is the rainiest month in French Guiana?
May is the most unfavourable month with May has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in French Guiana in September?
In September, overnight lows reach 25.0°C, while afternoon highs average 30.0°C.
Is French Guiana good in winter?
In winter (December-February), French Guiana scores 4.5/10 on average — Difficult period — prefer the peak season.. The best month overall remains September with a score of 5.6/10.
When should you avoid French Guiana?
May is the most difficult month to visit French Guiana, with May has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in French Guiana in September?
In September, the sea averages 31°C in French Guiana: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in French Guiana in September?
The average UV index reaches 9 in September in French Guiana (very high), with about 12.0h of daylight. Protection essential.