About San Sebastiano, Lombardy's Climate & Weather History

San Sebastiano, in Lombardy, Italy, is home to roughly 23,200 people in the Central European time zone at 45.7°N latitude.

In 2025, San Sebastiano recorded an average annual temperature of 55°F. The hottest temperatures reached 91°F in June; the coolest were 24°F in November. Total precipitation for the year was 63 inches, with the wettest month being July. Snowfall for the year totaled approximately 2 inches.