Typically the weather in Oslo in the month of September is 10. Through the month the highs are about 16 and lows around 7. Our table below has the full details:
| Month | Degrees Celsius |
|---|---|
| Temperature | 10 |
| High Temperature | 16 |
| Low Temperature | 7 |
| Sunshine Per Day | 5 |
Useful Links: Oslo Weather: Average Weather & Yearly Climate