Weather · Istanbul, Turkey
Istanbul Weather in September
September in Istanbul averages 25°C by day and 18°C at night, with about 49mm of rain. That makes it one of the best months to visit.
Avg high
25°C
77°F
Avg low
18°C
64°F
Rainfall
49mm
#9 wettest of 12
What to pack
Summer clothes by day; a light layer for evenings. Rain is unlikely to interrupt your plans.
Timing a trip around the weather? A Local Friend in Istanbul builds it around the season for you.