Monthey, in Valais, Switzerland, is home to roughly 17,800 people in the Europe/Zurich time zone at 46.3°N latitude.
In 2025, Monthey recorded an average annual temperature of 54°F. The hottest temperatures reached 93°F in August; the coolest were 18°F in February. Total precipitation for the year was 88 inches, with the wettest month being July. Snowfall for the year totaled approximately 26 inches.
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