Istanbul Weather in December

December in Istanbul brings low temperatures around 12°C (54°F) during the day, dropping to 7°C (45°F) at night, with the most rainfall of the year.

Rainfall in Istanbul in December

With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. Historically, the month has about 17 days of rain, averaging 103 mm (4.1 in) in total. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.

Temperature in Istanbul in December

Temperatures in Istanbul in December top out at 12°C (54°F) and drop to 7°C (45°F) overnight. December marks the winter season. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With lows around 7°C (45°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Istanbul in December

This month sees fewer sunny days, with about 61 hours of sunshine, perfect for those who enjoy cooler temperatures.

Average water temperature in December

With water temperatures around 11°C (52°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

December in Istanbul has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.