Istanbul Weather in January
Thinking of visiting Istanbul in January? Expect low temperatures reaching 10°C (50°F) during the day, dropping to 5°C (41°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Istanbul in January
Past climate data indicates that roughly 18 days will see rain, totalling around 89 mm (3.5 in) for the month. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.
Temperature in Istanbul in January
Daytime highs in Istanbul in January reach 10°C (50°F), with nights around 5°C (41°F). The month of January belongs to the winter season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. With lows around 5°C (41°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep. The temperatures in January are often the mildest compared to the rest of the year.
Sunshine in Istanbul in January
The area experiences limited sunny days, amounting to roughly 68 hours of sunshine. This makes it perfect for those who lean towards cooler, cloudier settings rather than intense sunlit days.
Average water temperature in January
At 9°C (48°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.January in Istanbul has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Turkey, check out our Istanbul's climate page.
Istanbul Temperature in January
Min Temperature
5°C (41°F)
Max Temperature
10°C (50°F)
Water Temperature
9°C (48°F)
Chance of Rain
60%
Precipitation
89 mm (3.5 in)
Rainy days
18 days
Sunshine
68 hours
Percentage Sunshine
22%
Daily Historical Temperatures
50-year average (1976-2026)
Based on our historical records, temperatures in Istanbul typically stay consistent throughout January, with daily highs averaging around 10°C (50°F). Nights are cold, with lows around 4°C (39°F).
Average temperatures in January
Daily Historical Precipitation
50-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Istanbul in January
Browse day-by-day weather records for Istanbul spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Istanbul historical weather extremes in January
The extremes listed below come from historical weather data collected in Istanbul from 1986 through 2025.
- The warmest day in January was on January 20, 2023, with a maximum of 19°C (66°F).
- On January 23, 2004, Istanbul saw its coldest January day with temperatures maxing out at -3°C (27°F).
- Nighttime temperatures dropped to -7°C (19°F) on January 26, 2022, marking the coldest January night on record.
Best Places in Turkey in January
Find out more about the weather in Turkey and which places have the best travel conditions in this month. See all of Turkey in January →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Istanbul in January
Cold weather calls for smart layering in January. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. Expect water temperatures of around 9°C (48°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.What To Do in Istanbul in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Turkey, check out our Istanbul's climate page.
Temperature Rainfall Sunshine Water Temp
See the full Istanbul climate overview or explore weather in Turkey.
