Weather in Schweiz in September
Country-wide climate normals across 14 cities in Schweiz.
How Hot Is Schweiz in September?
Schweiz's September is consistently warm — typical 20°C, with no major regional outliers.
Sunshine in Schweiz in September
Schweiz's September brings mixed skies — Zürich averages 4.3h of sun, with similar conditions nationwide. Cloudy periods alternate with sunny stretches, and the sun is up between 7:05 am and 7:35 pm. Plan for variability rather than guaranteed sunshine.
Does It Rain In Schweiz In September?
Heavy rain shapes Schweiz's September: Zürich averages 109mm across 11 days, and most regions of the country see similar persistent wet conditions. Long sunny stretches are rare. Expect rain on roughly two out of every three days.
Is Schweiz Humid In September?
Saturated air defines Schweiz's September: humidity at 78% in Zürich, with the country as a whole feeling muggy and oppressive. The air practically drips after rain, and even shaded outdoor areas feel warm and clammy. Plan indoor time during the most humid afternoon hours.
Wind In Schweiz In September
Schweiz's September has gentle wind — Zürich averages 10 kph, and the country tracks similarly. Outdoor activity is comfortable, and afternoon thermals add a pleasant breeze in inland areas.
Cloud Cover In Schweiz In September
Cloudy skies dominate Schweiz in September — 56% cover in Zürich, with similar overcast conditions in most regions. Direct sun is patchy and broken; expect grey stretches between brief bright moments. Coastal areas may be heavier than inland.