Normally average temperatures in Ascona during September is 9. High average temperature is 15 with low temperatures being around 7. We have provided a clearer breakdown here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 9 |
| High Temperature | 15 |
| Low Temperature | 7 |
| Sunshine Per Day | 6 |
Useful Links: Ascona Weather: Average Weather & Yearly Climate