Istanbul Weather Guide
Turkey
Best Time to Visit
April, May, September, October
Avoid
December, January (cold and rainy), July, August (peak crowds and heat)
Climate
Mediterranean-influenced humid subtropical — warm summers, cool wet winters
Annual Rainfall
29 inches (744 mm)
Overview
Istanbul straddles two continents with a climate to match. The Bosphorus creates a persistent wind corridor that moderates summer heat. Winters are cold and rainy with occasional snow. Spring and fall are exceptional.
Seasonal Weather Breakdown
Spring
March–May
46–68°F
8–20°C
Beautiful flowering parks, manageable crowds, and pleasant temperatures. The tulip festival (April) is spectacular.
- →Emirgan Park tulip festival (April) is unmissable
- →Layer up — Bosphorus winds can be cold
- →Fewer tourists than summer — enjoy shorter queues
Summer
June–August
72–86°F
22–30°C
Hot and increasingly crowded. Bosphorus breezes help the waterfront areas. Inland neighborhoods are significantly hotter.
- →Bosphorus ferries and waterfront neighborhoods for relief
- →Visit Hagia Sophia and Blue Mosque at opening
- →Rooftop bars with Bosphorus views are peak summer
Fall
September–November
57–77°F
14–25°C
Excellent season. Warm sea, thinner crowds, and beautiful light over the Bosphorus. Rain increases in November.
- →Sunset over the Bosphorus in October is extraordinary
- →Bosphorus swimming season extends into September
- →Crowds thin significantly after September 1
Winter
December–February
38–48°F
3–9°C
Cold, wet, and occasionally snowy. Snow every year, sometimes significantly. The city is beautiful under snow but logistics suffer.
- →Snow on the Blue Mosque domes is iconic
- →Major tourist sites are nearly empty
- →Pack proper winter gear — damp cold feels worse than the numbers suggest
What to Pack for Istanbul
- ✓Layers for unpredictable Bosphorus wind
- ✓Modest clothing for mosque visits (year-round)
- ✓Waterproof shoes October–April
- ✓Sunscreen for waterfront days in summer
Istanbul Weather FAQ
What is the best time to visit Istanbul?
April–May and September–October offer ideal weather (60–75°F/16–24°C) with manageable crowds. The tulip festival in April is spectacular. September offers warm Bosphorus waters with fewer summer tourists.
Does Istanbul get snow?
Yes, every winter — typically December through February. Significant snowfall (6+ inches) occurs every few years and can cause major disruption. The Asian and European sides often receive different amounts due to topography.
How does the Bosphorus affect Istanbul's weather?
The Bosphorus creates a persistent channel wind (the poyraz from the north) that keeps waterfront neighborhoods cooler and breezier than inland areas. In summer, this provides welcome relief; in winter, it amplifies wind chill.
Neighborhoods in Istanbul
Each neighborhood in Istanbul has its own microclimate. Check real-time conditions below: