Average temperatures within Castelsardo during the duration of December is 9. Throughout the month you should see a high of 15 with low of 7. We have provided a clearer breakdown here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 9 |
| High Temperature | 15 |
| Low Temperature | 7 |
Useful Links: Castelsardo Weather: Average Weather & Yearly Climate