French Guiana, French GuianaQuick decision
When to visit French Guiana?
🌞 Best time overall
September
🌡️ Optimal temperature
77°F–86°F in September
🌧 Least rain
46% rainy days in September
🌧 Wettest month
May (99%)
📅 Best score
7.7/10
By trip type
Best time by type of trip
Space CentreYear-round — Ariane launches from Kourou, Space Museum.
AmazoniaJuly–November — river pirogue trips, wildlife and Amerindian villages.
Leatherback TurtlesApril–July — nesting on Awala-Yalimapo beaches.
Salvation IslandsAugust–November — former penal colonies, tropical wildlife and history.
Monthly climate data
French Guiana weather month by month
| Month | Min °F | Max °F | Rainy days (%) | Precip. in/d | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌦️ January | 75°F | 82°F | 87% | 0.5in | 10.0h | 7.0/10 |
| 🌧️ February | 75°F | 82°F | 88% | 0.5in | 9.2h | 7.0/10 |
| 🌦️ March | 77°F | 82°F | 86% | 0.4in | 10.5h | 7.1/10 |
| 🌧️ April | 75°F | 82°F | 95% | 0.7in | 9.1h | 7.0/10 |
| 🌧️ May | 75°F | 82°F | 99% | 0.9in | 8.0h | 6.4/10 |
| 🌧️ June | 75°F | 82°F | 98% | 0.7in | 9.7h | 7.0/10 |
| 🌦️ July | 75°F | 84°F | 91% | 0.4in | 11.1h | 7.0/10 |
| ⛅ August | 75°F | 86°F | 65% | 0.2in | 11.5h | 7.2/10 |
| 🌤️ September | 77°F | 86°F | 46% | 0.1in | 11.4h | 7.7/10 |
| 🌤️ October | 77°F | 86°F | 47% | 0.1in | 11.6h | 7.7/10 |
| ⛅ November | 77°F | 84°F | 80% | 0.3in | 11.1h | 7.1/10 |
| 🌧️ December | 75°F | 82°F | 94% | 0.5in | 9.2h | 7.0/10 |
Ideal
Fair
Challenging climate
Source: Open-Meteo · 10 years
🌴 Tropical destination — heavy rain months benefit from an algorithmic adjustment: tropical showers are intense but brief and usually don't ruin a trip.
Seasonal breakdown
What to expect each season
🌸 Spring (Mar–May) — Acceptable
Average 28°F, 93% rainy days, 9.2h sunshine/day. Score: 6.8/10.
☀️ Summer (Jun–Aug) — Good time
Average 29°F, 85% rainy days, 10.8h sunshine/day. Score: 7.1/10.
🍂 Autumn (Sep–Nov) — Good time
Average 30°F, 58% rainy days, 11.4h sunshine/day. Score: 7.5/10.
❄️ Winter (Dec–Feb) — Good time
Average 28°F, 90% rainy days, 9.5h sunshine/day. Score: 7.0/10.
Accommodation
Find a place to stay in French Guiana
Check availability during the recommended period
Tip : off-peak months (May, June) are cheapest but weather is significantly worse.
Search on Hotels.comActivities & tours
Activities and tours in French Guiana
Guided tours, skip-the-line tickets and local experiences.
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Flights
Find a flight to French Guiana
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Monthly weather
Detailed weather by month
FAQ
Frequently asked questions
September is ideal with 46% rainy days and 30°F. The months of September & October offer comparable conditions.
May is the wettest month with 99% rainy days.
Yes, September is the best month with an average of 30°F.
In winter, the average score is 7.0/10. Acceptable conditions for cultural visits.
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