Costa Rica · AutumnMonth summary
Costa Rica weather in September
⚠️ Fair
🌡️ Temperature min / max
61°F – 77°F
🌧 Rainy days
96% of days
☀️ Sunshine
8.1h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
5.5/10
📅 📅 Best month
February (8.6/10)
Quick decision
Should you visit Costa Rica in September?
⚠️ Fair
✅ Yes if: you prefer off-season travel with reduced prices and very few tourists.
❌ No if: you want to avoid rain — more than half the days are rainy.
Our take: September is an average time for Costa Rica. February (8.6/10) is clearly preferable.
By trip type
Costa Rica in September by trip type
- 🏙️ 🏙️ City break / culture : ⚠️ Possible
- 🚶 🚶 Outdoor activities : ❌ Not recommended
- 🏖️ Beach / swimming : ❌ Not recommended
- 💰 💰 Budget : ✅ Low season
Local context
What to expect in September
Autumn marks the end of peak season in Costa Rica. Temperatures drop (25°F) and rain returns (96% of days). With 96% of rainy days, always have indoor alternatives planned. Not the best window, but acceptable if dates are constrained. February (8.6/10) is significantly better if possible.
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Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| ☀️ January | 61°F | 77°F | 24% | 0.1in | 10.7h | 8.2/10 |
| ☀️ February | 61°F | 79°F | 18% | 0.0in | 10.9h | 8.6/10 |
| 🌤️ March | 61°F | 81°F | 25% | 0.0in | 11.1h | 8.6/10 |
| 🌤️ April | 63°F | 81°F | 54% | 0.1in | 11.0h | 7.6/10 |
| 🌧️ May | 63°F | 79°F | 86% | 0.5in | 8.6h | 7.0/10 |
| 🌧️ June | 63°F | 75°F | 94% | 0.5in | 7.8h | 5.3/10 |
| ⛅ July | 63°F | 77°F | 76% | 0.4in | 8.6h | 7.0/10 |
| 🌧️ August | 63°F | 77°F | 85% | 0.5in | 8.9h | 6.9/10 |
| 🌧️ September | 61°F | 77°F | 96% | 0.6in | 8.1h | 5.5/10 |
| 🌧️ October | 61°F | 75°F | 94% | 0.7in | 7.9h | 5.2/10 |
| 🌧️ November | 63°F | 75°F | 81% | 0.4in | 8.7h | 7.0/10 |
| 🌤️ December | 61°F | 75°F | 37% | 0.1in | 10.8h | 7.7/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, Costa Rica averages 77°F, 96% rainy days and 8.1h of sunshine per day. Overall weather score: 5.5/10.
See methodology →
Comparison
September vs February (best month)
The best month is February (score 8.6/10). Difference:
- 🌡️ Max temperature : +1°F
- 🌧 Rainy days : -78%
- ☀️ Sunshine : +2.8h/day
FAQ
FAQ — Costa Rica in September
Is September a good time to visit Costa Rica?
September is an acceptable time for Costa Rica (score 5.5/10). Conditions are decent but not optimal — consider February (8.6/10) if possible.
Does it rain a lot in Costa Rica in September?
Yes, 96% of days see rain in September. Plan some indoor activities as backup.
Accommodation
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