More often than not the weather in Viareggio for the month of December is 6. You can expect highs around 11 with low of 4. The table below has further info:
| Month | Degrees Celsius |
|---|---|
| Temperature | 6 |
| High Temperature | 11 |
| Low Temperature | 4 |
Useful Links: Viareggio Weather: Average Weather & Yearly Climate