Castel San Pietro is a city of approximately 2,200 people in Ticino, Switzerland. Located in the Europe/Zurich time zone at 45.9°N latitude.
In 2025, Castel San Pietro recorded an average annual temperature of 54°F. The hottest temperatures reached 91°F in June; the coolest were 25°F in January. Total precipitation for the year was 87 inches, with the wettest month being August. Snowfall for the year totaled approximately 1 inches.
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