Usually average temperatures are Mont-De-Marsan all through the month of December is 5 with a typical high being 11 and lows around 3. The table below has further info:
| Month | Degrees Celsius |
|---|---|
| Temperature | 5 |
| High Temperature | 11 |
| Low Temperature | 3 |
| Sunshine Per Day | 4 |
Useful Links: Mont-De-Marsan Weather: Average Weather & Yearly Climate