Best Time to Visit Turkey
Turkey has a comfortable year-round climate. Spring and autumn, from March to May and September to November respectively, are marked by mild to warm days and cool nights. The summer months from June through August provide warm to hot days and pleasant evenings. Winter falls from December through February and days are crisp and evenings can be cold. The year-round temperature range is 6°C to 15°C (January), 11°C to 21°C (April), 22°C to 34°C (July), 15°C to 27°C (October).
The best times to visit Istanbul are in spring (April to May) and autumn (September to October), when skies are clear and temperatures are moderate. During July and August it is hot and steamy; a lot of Istanbullus head for the west and south coasts over these months and some businesses close. Biting winter winds and snow are common in winter.