Weather in Switzerland in September
Country-wide climate normals across 14 cities in Switzerland.
How Hot Is Switzerland in September?
Uniform warmth covers Switzerland in September: highs near 20°C across all cities.
Sunshine in Switzerland in September
Sun and cloud trade off across Switzerland in September: Zürich averages 4.3h of direct sun a day, with daylight from 7:05 am to 7:35 pm. Conditions vary day to day, with bright spells interrupted by cloudy stretches. Most regions of the country see a similar mixed pattern, though some areas may lean drier or wetter than the national average.
Does It Rain In Switzerland In September?
Switzerland's September is wet across most regions: 109mm in Zürich across 11 days, with rain falling on most days of the month. Coastal and highland regions can see significantly more, while interior regions may stay slightly drier. Sunny stretches are brief and uncommon.
Is Switzerland Humid In September?
Saturated air defines Switzerland'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 Switzerland In September
Light breezes are typical across Switzerland in September: 10 kph in Zürich, with similar gentle wind conditions in most regions. The air moves enough to keep things fresh on warm days but not enough to be disruptive. Coastal cities may see slightly more.
Cloud Cover In Switzerland In September
Cloudy skies dominate Switzerland 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.