Frequent average weather in Guernsey during January is 5 with the high being 8 with lows around 5. Our table below has the full details:
| Month | Degrees Celsius |
|---|---|
| Temperature | 5 |
| High Temperature | 8 |
| Low Temperature | 5 |
| Sunshine Per Day | 3 |
Useful Links: Guernsey Weather: Average Weather & Yearly Climate