What weather should international travelers expect in Istanbul in late summer and early autumn, and what clothes should they pack?
From messages by 4 participants in 2 sources · Last activity: today
In late September, Istanbul may shift into autumn conditions: northern winds can bring temperatures below 20°C, with rain possible for several consecutive days. Pack a waterproof outer layer and warmer clothing for this period.
19 days ago below 20°C, rain 26–30 September
Istanbul weather can vary sharply even within a single week: conditions may range from 12°C with rain and wind to sunny 25°C. Along with light clothing, pack a warm layer and rain protection.
37 days ago 12°C with rain and wind to sunny 25°C
In August, Istanbul daytime temperatures are commonly around 30°C with high humidity. A T-shirt works well for sightseeing, although the heat may feel intense for the first couple of days after arriving from a cooler climate.
around 30°C
October weather can change quickly, with strong wind, rain and thunderstorms sometimes disrupting a full day of sightseeing. Pack a waterproof outer layer and closed shoes for an autumn visit.
October rain and thunderstorms
From mid-July to around 20 September, expect reliably warm and often hot conditions. Lightweight summer clothes are suitable by day, with a thin extra layer useful for breezy evenings.
mid-July to 20 September
A T-shirt is generally enough in Istanbul during the warm season, but do not pack only summer tops: keep a lightweight jacket or windbreaker in your carry-on for evening wind and sudden rain.
lightweight windbreaker