Istanbul in December: Weather Guide
“Green, wet, atmospheric. Bring proper waterproofs.”
Roughly 13 rainy days across the month, on average.
December settles across Istanbul with a cool crispness in the morning air — the kind of month when the Bosporus, Turkey shows a clear seasonal face. Averages sit around 11.4°C (52.5°F) by day and 6.3°C (43.3°F) after dark, with rainfall near 90 mm across roughly 12.6 rainy days — arriving in long grey bands that soften light and pace. Daylight runs about 5.5 hours per day, compact daylight that puts a premium on morning starts, and the season stamps its signature on details like ferries crossing the Bosporus at dawn.
On the ground, cold shapes the timing. Time around Sultanahmet shows best in mid-morning light before the chill deepens; warm interiors — cafés, museums, shops near Karaköy waterfront — carry the middle of the day. Evenings run short outdoors and long indoors, which suits the local rhythm rather than fighting it.
Reading across 11 complete years (2015–2025), December in Istanbul has trended less predictable in recent seasons, with the last few years pushing daytime highs and rainfall patterns modestly away from the older normals. The 2026 signal so far tracks the recent shape rather than the long-run midpoint — meaning what you see above is weighted to how this month has actually been running, not a smoothed 30-year picture that masks the shift.
For travellers planning around 2026, this profile is the honest baseline. Match the packing list to the numbers — not to the month name — and you avoid the classic mismatch of arriving with the wrong shell, the wrong shoes, or the wrong daylight assumptions. The rest of this page breaks down what to wear, what to do, and how the season tends to run for Istanbul visitors in 2026.
European side is Istanbul proper; Asian Kadikoy is where 30-somethings actually live and drink at Moda seaside. Real Turkish breakfast (kahvalti) is weekend 4-hour affair in Besiktas or Kadikoy, not hotel buffet. Balik ekmek fish sandwich under Galata Bridge is tourist food; go to Karakoy Balikcisi. Don't sit on the aisle seat on ferries; locals want to feed the seagullscrossing. Ramadan iftar cannons still fire from Sultanahmet.
What to pack for Istanbul in December
With highs only near 11.4°C and lows around 6.3°C, cold-weather kit is non-negotiable, especially for long walking days. Waterproofing matters this month — expect meaningful rain and plan around it.
- a warm waterproof coat
- thermals
- waterproof shoes
- gloves
- a beanie
What to pack for Istanbul in December
- →Lightweight fleeceAmazon · shop this
- →Merino travel socksAmazon · shop this
- →Compact travel umbrellaAmazon · shop this
- →Universal travel adapterAmazon · shop this
- →Compression packing cubesAmazon · shop this
- →Anti-theft crossbody bagAmazon · shop this
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Where to stay in Istanbul
We don't review individual hotels — plenty of people do that well. What we do is send you to compare rooms in Istanbul across trusted platforms.
Compare hotels on Booking.com→Estimated December trip to Istanbul
Peak season prices — book early or shift by 2–3 weeks to save. Rule-based estimates from a couple based in London — actual prices vary.
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Delayed flight to Istanbul?
Flights to Istanbul in December can be delayed by storms. Claim up to €600 if yours is 3+ hours late. EU regulations cover flights departing from or arriving in the EU/UK.
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Things worth doing
Best-fit activities include Bosporus cruises, bazaar visits, mosque tours, and hammam sessions — a mix suited to the month's daylight and weather pattern.
December vs. the rest of the year
How this month compares in Istanbul. Tap any month to read more.
highlighted months are among the best time to visit.
Best time to visit Istanbul
While December has its own character in Istanbul, the data-backed best months to visit Istanbul are May, June, July, August. These months combine the most favourable temperatures, rainfall, and sunshine across an 11-year climate record (2015–2025).
See the full best-time-to-visit guide for IstanbulOther places with a similar climate right now
Read more about Istanbul
Turkey in winter is not one climate but five. Antalya at 15°C, Cappadocia balloons over snow, Konya's Şeb-i Arus — the honest regional breakdown.
Turkey isn't one climate — it's five. 11 complete years of data (2015–2025) on when to visit Istanbul, Cappadocia, Antalya, Bodrum, Fethiye and central Anatolia.
Istanbul in December — FAQ
Q01Is December a good month for Istanbul?
Is December a good month for Istanbul?
It is a fair time to visit — expect variable conditions and plan flexibility. In December, Istanbul averages a high of 11°C (53°F) and a low of 6°C (43°F), with 90mm of rainfall across roughly 13 rainy days. April tulip season (Emirgan Park) coincides with Bosphorus ferries running all six routes; September shoulder avoids July's 35C humidity in Grand Bazaar.
Q02How warm does Istanbul get in December?
How warm does Istanbul get in December?
The average high temperature in Istanbul during December is 11°C (53°F), with an average low of 6°C (43°F). These figures are averaged from 11 complete years of daily records (2015–2025, Open-Meteo Archive). January snow shuts Ataturk bridge; simit sellers stay out, hamams do peak business, and Bosphorus fog cancels ferries for days.
Q03Does it rain a lot in Istanbul in December?
Does it rain a lot in Istanbul in December?
Istanbul averages approximately 13 rainy days in December, with a total monthly rainfall of about 90mm. This is based on daily precipitation records where days with 1mm or more of rain are counted as rainy days. November-December brings 4-day systems that flood Eminonu underpass; taxis triple prices and metro stays reliable.
Q04What clothes should I bring to Istanbul in December?
What clothes should I bring to Istanbul in December?
For Istanbul in December, pack a merino base layer for evenings, a compact umbrella or waterproof jacket, comfortable walking shoes. These recommendations are based on 11 complete years of weather averages for this specific month. A crossbody bag with zippers because Istiklal Street pickpockets work in pairs and target loose backpacks.
Q05Are there many tourists in Istanbul in December?
Are there many tourists in Istanbul in December?
Tourist crowds in Istanbul during December are typically moderate. Consider this when planning accommodation — prices track crowd levels closely. European side is Istanbul proper; Asian Kadikoy is where 30-somethings actually live and drink at Moda seaside. Real Turkish breakfast (kahvalti) is weekend 4-hour affair in Besiktas or Kadikoy, not hotel buffet. Balik ekmek fish sandwich under Galata Bridge is tourist food; go to Karakoy Balikcisi. Don't sit on the aisle seat on ferries; locals want to feed the seagullscrossing. Ramadan iftar cannons still fire from Sultanahmet.