Rosario · AutumnMonth summary
Rosario weather in September
✅ Good
🌡️ Temperature min / max
10°C – 21°C
🌧 Rainy days
18% of days
☀️ Sunshine
11.2h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.8/10
📅 📅 Best month
November (8.7/10)
Quick decision
Should you visit Rosario in September?
✅ Good
✅ Yes if: you want to explore the city on foot without suffering from heat.
❌ No if: you're looking for a beach destination — water and air are still cool.
Our take: Rosario in September: 21°C and 11.2h of sunshine. Decent, but not the peak.
By trip type
Rosario in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : — No sea access
- 💰 💰 Budget : 🌿 Shoulder
Local context
What to expect in September
Autumn in Rosario is often underrated: 21°C, golden light and declining crowds. An interesting window. Rain risk remains low (18% of days), leaving good room for outdoor activities. A good balance between weather and crowds, even if November (8.7/10) remains theoretically better.
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All months for Rosario
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 21°C | 31°C | 28% | 3.5 | 13.5h | 8.0/10 |
| 🌤️ February | 20°C | 30°C | 28% | 3.6 | 12.6h | 8.1/10 |
| 🌤️ March | 18°C | 27°C | 31% | 4.2 | 11.7h | 8.2/10 |
| 🌤️ April | 15°C | 23°C | 31% | 4.6 | 10.1h | 7.6/10 |
| 🌤️ May | 11°C | 19°C | 20% | 2.8 | 9.6h | 7.3/10 |
| ⛅ June | 7°C | 16°C | 14% | 0.7 | 9.2h | 7.1/10 |
| ⛅ July | 7°C | 16°C | 18% | 1.2 | 9.5h | 7.1/10 |
| 🌤️ August | 8°C | 18°C | 14% | 1.9 | 10.0h | 7.3/10 |
| 🌤️ September | 10°C | 21°C | 18% | 1.8 | 11.2h | 7.8/10 |
| 🌤️ October | 13°C | 24°C | 26% | 2.8 | 12.0h | 8.1/10 |
| ☀️ November | 16°C | 27°C | 23% | 2.7 | 13.1h | 8.7/10 |
| 🌤️ December | 19°C | 30°C | 27% | 2.7 | 13.9h | 8.4/10 |
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, Rosario averages 21°C, 18% rainy days and 11.2h of sunshine per day. Overall weather score: 7.8/10.
See methodology →
Comparison
September vs November (best month)
The best month is November (score 8.7/10). Difference:
- 🌡️ Max temperature : +6°C
- 🌧 Rainy days : +5%
- ☀️ Sunshine : +1.9h/day
FAQ
FAQ — Rosario in September
Is September a good time to visit Rosario?
September is an excellent time to visit Rosario (score 7.8/10). With 21°C, 11.2h of sunshine and 18% rain, conditions are very favourable.
What to do in Rosario in September?
With 21°C max and 11.2h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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