Overview: Lazio - Italy Lazio (Italy) in general has a hot climate. Temperatures during the day are in the range from 12 °C (54 °F) in January to 30 °C (86 °F) in August. The driest month is July with just 3 days of rain, on the contrary, the month when it rains the most is November with 12 days of rain. The highest sea temperatures in Lazio are in August with 25 °C (78 °F) and the lowest in February with 14 °C (57 °F). Temperatures during the night go from 4 °C (39 °F) in January to 20 °C (67 °F) in August.