With a population of around 3,900, Troistorrents sits in Valais, Switzerland. The city operates in the Europe/Zurich time zone.
In 2025, Troistorrents recorded an average annual temperature of 50°F. The hottest temperatures reached 89°F in August; the coolest were 12°F in February. Total precipitation for the year was 73 inches, with the wettest month being September. Snowfall for the year totaled approximately 31 inches.
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