Generally the typical temperate in Reykjavik through the month of January is 1. You can expect a high of 3 and low average expected to be -3. The table below has further info:
| Month | Degrees Celsius |
|---|---|
| Temperature | 1 |
| High Temperature | 3 |
| Low Temperature | -3 |
| Sunshine Per Day | 2 |
Useful Links: Reykjavik Weather: Average Weather & Yearly Climate