ClimaGo › Istanbul › Weather in September
Turkey
September offers slightly cooler temperatures around 26°C with comfortable humidity levels, ideal for leisurely Bosphorus cruises and exploring archaeological sites without summer's oppressive heat.
Avg High
25°C
Avg Low
17°C
Daily Rain
1.3mm
Rainfall
Low
✅ September is one of the best months to visit Istanbul!
Istanbul's domed mosques, bustling bazaars and Bosphorus views bridge East and West unforgettably.