
Sion in September
Sion in September
Sion, Switzerland
Visiting Sion in September means experiencing the autumn. During autumn, Sion offers crisp air, changing colours, and a cosy atmosphere.
Weather in Sion in September
Average highs around 22.7C and lows near 12.5C. 112.1mm average precipitation and about 12 rainy days. September typically sits between August and October conditions, so it is useful for travelers wanting a balanced window in Sion. Pack quick-dry clothing and a light waterproof layer for September.
Temperature
September brings autumn conditions in Sion, Switzerland. The average temperature is about 17.6C, with lows near 12.5C and highs around 22.7C.
Sunshine Hours
Sion, Switzerland usually gets around 9.7 hours of sunshine per day in September, with roughly 12.5 daylight hours available for sightseeing.
Rain
September sees around 112.1mm of rainfall over about 12 days. Rain can occur for around 5.6 hours per day on average.











