Generally, the weather in Cagliari in January is 8, with highs being around 14 and typical average low being around 6 celsius. The table below includes more detail:
| Month | Degrees Celsius |
|---|---|
| Temperature | 8 |
| High Temperature | 14 |
| Low Temperature | 6 |
| Sunshine Per Day | 5 |
Useful Links: Cagliari Weather: Average Weather & Yearly Climate