Weather
Average highs sit around 10°C with lows near 5°C. Expect a fair amount of rain, so plan indoor backups.
Crowds & demand
Crowd levels are Moderate for Istanbul — manageable crowds at the big attractions.
Prices & value
Prices run low season this month: some of the best deals of the year.
Events & what’s on
No major festivals fall in December, so the destination feels like its everyday self.
The verdict
December is a mixed month in Istanbul. You get 10° / 5°, but manageable crowds at the big attractions. Worth it for the right traveller.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated July 2026
