Normally the average weather in Boston right-through December is 2 with highs being 5 with lows around -3 degrees. With the details being further below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 2 |
| High Temperature | 5 |
| Low Temperature | -3 |
| Sunshine Per Day | 6 |
Useful Links: Boston Weather: Average Weather & Yearly Climate