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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Coast Brief Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Istanbul weather is shaped by its humid subtropical climate, bringing warm, muggy summers and cool, damp winters. The live forecast above gives a short-term snapshot, while seasonal averages and historical data help with longer-range planning.
How does Istanbul weather change across the year?
Summers (June–September) are hot and humid, with average highs around 29°C, while winters (December–February) are cool and wet, with temperatures often dropping to 4°C. Spring and autumn offer mild transitions, though rain is possible year-round.
- Summer: highs near 29°C, low humidity in July and August, occasional afternoon thunderstorms.
- Winter: averages 5–10°C, frequent rain and occasional snow (especially January).
- Spring (April–May): 12–20°C, pleasant but changeable; pack layers.
- Autumn (September–November): cooling from 25°C to 12°C; often sunny early, wetter later.
For precise planning, travellers check istanbul weather in celsius on the live chart above, or consult the 10-day forecast for extended outlooks.
What should I pack for Istanbul?
Pack layers and rain gear regardless of season – the live forecast above shows current conditions, but the city’s weather can shift quickly.
- Summer: light cotton clothing, sun protection, a light jacket for evenings.
- Winter: warm coat, waterproof shoes, umbrella; snow is infrequent but possible.
- Shoulder seasons: mix of short sleeves and jumpers; a compact raincoat is useful.
What is the best time to visit Istanbul?
Late spring (April–May) and early autumn (September–October) offer the most comfortable weather – mild temperatures around 15–25°C, lower rainfall, and fewer crowds than peak summer.
Does it snow in Istanbul?
Snow falls on a few days each winter, typically in January or February. Accumulation is rare in the city centre, but the live forecast above can alert you to cold snaps and possible flurries.
Can I check istanbul weather 30 days ahead?
Long-range forecasts beyond 10–15 days have low reliability. For a general idea, use istanbul weather by month averages above; the live forecast and the 10-day forecast are your most dependable tools for near-term planning.