More often than not the weather in Cardiff throughout January is 6. You can expect a high of 7 and lows around 3. The table below has some further insights:
| Month | Degrees Celsius |
|---|---|
| Temperature | 6 |
| High Temperature | 7 |
| Low Temperature | 3 |
| Sunshine Per Day | 3 |
Useful Links: Cardiff Weather: Average Weather & Yearly Climate