You should expect the average temperature in Marcellus during the duration of September is 16. Average high degrees are usually 25 and low of 11 degrees celsius. We have put some more detail below here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 16 |
| High Temperature | 25 |
| Low Temperature | 11 |
Useful Links: Marcellus Weather: Average Weather & Yearly Climate