Usually the average weather in Santander throughout the time of September is 17 with highs being 22 and low of 16 degrees celsius. We have put some more detail below here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 17 |
| High Temperature | 22 |
| Low Temperature | 16 |
| Sunshine Per Day | 7 |
Useful Links: Santander Weather: Average Weather & Yearly Climate