Generally the weather in Monfalcone in September is 17 with a typical high being 25 with low of 13 degrees celsius. We have put some more detail below here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 17 |
| High Temperature | 25 |
| Low Temperature | 13 |
| Sunshine Per Day | 8 |
Useful Links: Monfalcone Weather: Average Weather & Yearly Climate