Normally the average weather in Siena during April is 10 with a high of 15 and low being 8. Discover more info below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 10 |
| High Temperature | 15 |
| Low Temperature | 8 |
| Sunshine Per Day | 6 |
Useful Links: Siena Weather: Average Weather & Yearly Climate