Weather in Vilnius right through December is -2. Through the month the highs are about -1 degrees and a low of -5 celsius. The table below includes more detail:
| Month | Degrees Celsius |
|---|---|
| Temperature | -2 |
| High Temperature | -1 |
| Low Temperature | -5 |
| Sunshine Per Day | 3 |
Useful Links: Vilnius Weather: Average Weather & Yearly Climate