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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Daily Press UK weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Istanbul’s weather is defined by a humid subtropical climate with cool, wet winters and warm, dry summers. The live forecast above gives the current conditions, but the city’s seasonal range spans from near-freezing winter days to summer highs above 30°C, with rainfall peaking in December and January.
What does Istanbul’s climate look like across the year?
Istanbul sits at the crossroads of Europe and Asia, and its weather reflects that – influenced by the Black Sea to the north and the Sea of Marmara to the south. Winters (December to February) are chilly and damp, with average lows around 3–5°C. Snow is possible but not heavy, and frost occurs a few nights each month. Summers (June to August) are hot and relatively dry, with July and August often seeing temperatures above 28°C and high humidity. Spring and autumn are mild and pleasant, though rain can arrive at any time.
If you’re checking istanbul weather february or istanbul weather in january, expect daytime highs of 7–10°C and frequent drizzle. For istanbul weather december, rainfall is at its heaviest – about 100 mm on average. Longer-range outlooks, such as weather istanbul 30 days or istanbul weather 15 days, can give a general trend but should be treated as broad guidance rather than precise forecasts. For the most reliable planning, look at the istanbul weather 14 days or weather in istanbul 10 days – these shorter windows are more accurate.
How do seasonal details affect travel plans?
The best time to visit Istanbul for outdoor sightseeing is late spring (April to June) or early autumn (September to October), when temperatures are mild and rainfall is moderate. Summer can feel oppressively humid, while winter requires a warm coat and umbrella. The city’s microclimate also means northern districts near the Bosphorus can be a few degrees cooler than southern areas – something the live forecast above will reflect for your specific location.
If you’re planning a longer trip, the istanbul weather 15 days outlook might help you pack, but always check the 10 Day Weather Forecast UK for nearby reference. For a broader perspective on UK conditions, our UK weather hub covers the latest across Britain.
When is the best time to visit Istanbul for mild weather?
April to June and September to October offer comfortable temperatures (15–25°C) and lower rainfall. These shoulder months avoid both the heat of summer and the damp chill of winter.
Does Istanbul ever get snow?
Yes, though snow is not frequent. Istanbul typically sees 10–15 snow days per year, mostly in January and February. Heavy accumulation is rare, but occasional falls can disrupt transport.
How reliable are 30-day Istanbul weather forecasts?
Long-range forecasts (30 days) show only broad seasonal trends – they are not reliable for daily planning. For practical accuracy, use the 10- or 14-day outlook, or check the live forecast above.