Oslo · AutumnMonth summary
Oslo weather in September
⚠️ Fair
🌡️ Temperature min / max
10°C – 16°C
🌧 Rainy days
38% of days
☀️ Sunshine
8.1h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
6.5/10
📅 📅 Best month
June (7.8/10)
Quick decision
Should you visit Oslo in September?
⚠️ Fair
✅ 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: Not the best window: 38% rain risk and 8.1h of sunshine. June is much safer.
By trip type
Oslo in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ⚠️ Possible
- 🏖️ Beach / swimming : ❌ Not recommended
- 💰 💰 Budget : 🌿 Shoulder
Local context
What to expect in September
🎯 Cultural sites less crowded than peak season — more enjoyable visits Autumn marks the end of peak season in Oslo. Temperatures drop (16°C) and rain returns (38% of days). Expect rain on 38% of days — a light raincoat in the bag is recommended. Not the best window, but acceptable if dates are constrained. June (7.8/10) is significantly better if possible.
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Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌨️ January | -5°C | 1°C | 35% | 2.3 | 1.7h | 2.0/10 |
| 🌨️ February | -3°C | 2°C | 37% | 2.0 | 5.7h | 3.5/10 |
| 🌫️ March | -2°C | 5°C | 27% | 1.7 | 8.6h | 4.3/10 |
| 🌫️ April | 2°C | 11°C | 27% | 1.7 | 11.8h | 6.9/10 |
| ⛅ May | 8°C | 17°C | 36% | 2.2 | 13.5h | 7.2/10 |
| 🌤️ June | 12°C | 21°C | 40% | 2.9 | 14.6h | 7.8/10 |
| 🌤️ July | 14°C | 21°C | 42% | 3.6 | 13.8h | 7.6/10 |
| 🌤️ August | 13°C | 20°C | 42% | 2.9 | 11.5h | 7.3/10 |
| ⛅ September | 10°C | 16°C | 38% | 3.0 | 8.1h | 6.5/10 |
| 🌦️ October | 5°C | 11°C | 41% | 3.0 | 4.5h | 4.0/10 |
| 🌦️ November | 1°C | 5°C | 40% | 2.7 | 0.9h | 1.4/10 |
| 🌨️ December | -2°C | 2°C | 41% | 2.2 | 0.2h | 1.3/10 |
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, Oslo averages 16°C, 38% rainy days and 8.1h of sunshine per day. Overall weather score: 6.5/10.
See methodology →
Comparison
September vs June (best month)
The best month is June (score 7.8/10). Difference:
- 🌡️ Max temperature : +5°C
- 🌧 Rainy days : +2%
- ☀️ Sunshine : +6.5h/day
FAQ
FAQ — Oslo in September
Is September a good time to visit Oslo?
September is an acceptable time for Oslo (score 6.5/10). Conditions are decent but not optimal — consider June (7.8/10) if possible.
What to do in Oslo in September?
With 16°C max and 8.1h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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