Istanbul weather

Our guide to the weather in Istanbul during December

11

Average high

2

UV Index

94mm

Monthly rainfall

12

Sea temperature

Istanbul is a vibrant city where East meets West. It's best known for its stunning historical sites, bustling bazaars, and delicious cuisine. We've looked at the most up-to-date weather data for Istanbul, covering the last 12 years up to 2026, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Istanbul weather in December.

What's the temperature like in Istanbul during December?

The temperature is extremely stable in December with average highs of 11℃ and lows just 3℃ lower at 8℃. The UV index will be low at this time of year, so not something to worry about. However, if you're going to be outside for long periods it's always a good idea to apply a small amount of sunscreen to exposed skin.

Does it snow in Istanbul during December?

Possibly. There's a chance of snow during December but not as much as you might think. Check the local forecast before you leave home so that you can pack appropriate footwear and clothing.

Does it rain in Istanbul during December?

On average, there will be 7 rainy days during the month, amounting to 93.5mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. There's a small chance that you'll catch a thunderstorm during your trip.

Is it windy in Istanbul during December?

You're unlikely to experience any strong winds. Expect a gentle breeze that increases to moderate at times during December. With moderate air temperatures, any breeze will feel cool.

Is it too cold to swim in the sea in Istanbul during December?

The water around Istanbul is a bracing 12℃ during December and is too cold for for swimming. Those who frequently swim in cold open water might want to take a very quick dip, but prolonged exposure could cause hypothermia. A winter wetsuit will allow longer exposure to the water.

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18th February 2026 by Coco Butter Blog

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10th October 2022 by Inside the Travel Lab

If you’re looking for a new travel destination to explore in winter, look no further than Istanbul! While most of Europe suffers from cold and bleak winters, the winters in Istanbul are mild, thanks to its location in the Mediterranean Basin. Though it does occasionally snow in Istanbul, visitors can still enjoy the city’s best attractions, whether that is the interesting history, rich culture, or mouth-watering food. ...

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12th January 2025 by Travel Vixta

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Weather in Istanbul

Our month-by-month guide to the weather and climate in Istanbul

8.8

Istanbul weather in

January
9.9

Istanbul weather in

February
11.8

Istanbul weather in

March
15.9

Istanbul weather in

April
21.5

Istanbul weather in

May
26.1

Istanbul weather in

June
28.6

Istanbul weather in

July
28.6

Istanbul weather in

August
25.1

Istanbul weather in

September
20.0

Istanbul weather in

October
16.1

Istanbul weather in

November
11.4

Istanbul weather in

December