Rio de Janeiro · AutumnMonth summary
Rio de Janeiro weather in September
✅ Good
🌡️ Temperature min / max
20°C – 26°C
🌧 Rainy days
28% of days
☀️ Sunshine
10.7h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
8.2/10
📅 📅 Best month
September (8.2/10)
Quick decision
Should you visit Rio de Janeiro in September?
✅ Good
✅ Yes if: you want good weather with lower prices than peak season.
❌ No if: you need guaranteed perfect weather — some mixed days are possible.
Our take: Rio de Janeiro in September: 26°C and 10.7h of sunshine. Decent, but not the peak.
By trip type
Rio de Janeiro in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : ✅ Good
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in September
🎯 Ideal conditions for families — pleasant weather and outdoor activities accessible Autumn in Rio de Janeiro is often underrated: 26°C, golden light and declining crowds. An interesting window. Expect rain on 28% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if September (8.2/10) remains theoretically better.
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Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 24°C | 30°C | 47% | 5.0 | 12.0h | 7.6/10 |
| 🌤️ February | 24°C | 30°C | 48% | 4.5 | 11.8h | 7.6/10 |
| 🌤️ March | 24°C | 29°C | 42% | 4.3 | 11.3h | 7.8/10 |
| 🌤️ April | 22°C | 27°C | 40% | 2.8 | 10.5h | 7.9/10 |
| ☀️ May | 20°C | 25°C | 29% | 1.9 | 9.9h | 8.0/10 |
| ☀️ June | 19°C | 25°C | 29% | 1.3 | 9.8h | 8.0/10 |
| 🌤️ July | 18°C | 24°C | 21% | 1.3 | 10.0h | 8.1/10 |
| 🌤️ August | 18°C | 24°C | 32% | 2.0 | 10.0h | 7.8/10 |
| 🌤️ September | 20°C | 26°C | 28% | 2.0 | 10.7h | 8.2/10 |
| 🌤️ October | 21°C | 26°C | 48% | 2.9 | 10.5h | 7.6/10 |
| 🌤️ November | 21°C | 26°C | 51% | 4.3 | 11.5h | 7.6/10 |
| 🌤️ December | 23°C | 28°C | 48% | 4.2 | 12.1h | 8.0/10 |
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, Rio de Janeiro averages 26°C, 28% rainy days and 10.7h of sunshine per day. Overall weather score: 8.2/10.
See methodology →
Comparison
September vs September (best month)
The best month is September (score 8.2/10). Difference:
- 🌡️ Max temperature : +0°C
- 🌧 Rainy days : +0%
- ☀️ Sunshine : +0.0h/day
FAQ
FAQ — Rio de Janeiro in September
Is September a good time to visit Rio de Janeiro?
September is an excellent time to visit Rio de Janeiro (score 8.2/10). With 26°C, 10.7h of sunshine and 28% rain, conditions are very favourable.
What to do in Rio de Janeiro in September?
With 26°C and 10.7h of sunshine, all outdoor activities are possible: hiking, sightseeing and terraces.
Accommodation
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