SeasonScore
Istanbul, Turkey
Photo: Johannes Hafner · CC BY-SA 3.0

Turkey

Istanbul in December

🧥 Winter

Cool and some showers. Watch for hazy air.

🎒 Pack: warm jacket for evenings · N95 mask for hazy days

Best months: May (9.3), Jun (9.3), Sep (9.3)

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Why December scores 7.5What goes into the score

How it works
🌡️ 11° / 6°C🌧️ 87 mm💧 dew pt 6°🍃 PM2.5 46
  • Weather comfort7.6
    • !Cool (11°C highs / 6°C lows)
    • ✓Comfortable humidity (dew point 6.1°C)
    • ✓Mostly dry (~87 mm rain)
  • Air quality4.5
    • !Unhealthy for sensitive groups (PM2.5 ~46 µg/m³)
  • Seasonal hazards10.0
    • ·No notable seasonal hazards
  • Safety baseline7.5
    • ·Increased caution
Compare monthsPut December side by side with another month
DecMay
Score7.5 Very good9.3 Excellent
Season🧥 Winter🌷 Spring
High / low11° / 6°22° / 13°
Rain87 mm30 mm
Humiditydew pt 6°dew pt 13°
PM2.546 µg/m³18 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: Istanbul Florya weather-station normals. Rainfall: Florya, Istanbul weather-station normals (national met service).

Holidays & crowdsDecember 2026

No long holidays

No long public-holiday weekends this month. School holidays aren't counted, so check those if you want to avoid family crowds.

No national public holidays in Turkey this month.

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Nature calendarBlossoms, leaves & seasons in Istanbul

  • Snowy daysIn DecemberTypical dates
    Snow likely Dec–Feb (most in Feb: ~4 days)

    Average number of days with snowfall at Istanbul Florya.

    Source: Istanbul Florya weather-station normals (national weather service, via Wikipedia climate table)

Explore IstanbulEvents, sights, food & souvenirs

Check event dates locally

Turkey's largest city, spanning Europe and Asia across the Bosphorus, with Byzantine and Ottoman monuments, bazaars and a famous food scene.

Events in December

No major events on our calendar for December.

Coming up later

RamadanDate variesIslamic calendar - moves about 11 days earlier each year

Daytime fasting is followed by lively evenings and iftar gatherings.

Why go: Restaurants stay open, but evenings around mosques are crowded.

Where: Citywide, especially Sultanahmet

Istanbul Tulip FestivalDate variesUsually April

Millions of tulips are planted across the city's parks.

Why go: Emirgan Park has some of the best displays.

Where: Emirgan Park, Gülhane Park and citywide

Istanbul Music FestivalDate variesUsually June

A long-running festival of classical music.

Why go: Some concerts take place in historic buildings.

Where: Concert halls and historic venues