Typically, you can expect that the weather in Holywood through the whole of January is 6. With the average high being 7 with lows around 3. We have put some more information below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 6 |
| High Temperature | 7 |
| Low Temperature | 3 |
Useful Links: Holywood Weather: Average Weather & Yearly Climate