Typically, you can expect that the weather in Santander through the whole of April is 11. Average high degrees are usually 15 and lows being 10 celsius. The table below includes more detail:
| Month | Degrees Celsius |
|---|---|
| Temperature | 11 |
| High Temperature | 15 |
| Low Temperature | 10 |
| Sunshine Per Day | 7 |
Useful Links: Santander Weather: Average Weather & Yearly Climate