Temperature
Cool by day, cold at night.
Arosa is most comfortable in spring and winter. Summers are cool and winters are cold. Winter also brings ski season, with meaningful snow around September to July. Humidity is usually low.

Cool by day, cold at night.
Recurring showers across the month.
Cloudier spells limit sunshine.
Humidity is rarely noticeable.
In August, afternoons feel about 60° and nights feel near 45°.
Mostly cloudy skies.
August late afternoons are around 62°F, easing to about 57°F in early evening.
Calm winds are typical in August.
Want a side-by-side climate view? Compare Arosa with Oslo.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 11, 2026
Data & methodology