Usually the average weather in Bydgoszcz all through December is 4 with the high being 5 with lows about 0. The table below has further info:
| Month | Degrees Celsius |
|---|---|
| Temperature | 4 |
| High Temperature | 5 |
| Low Temperature | 0 |
Useful Links: Bydgoszcz Weather: Average Weather & Yearly Climate