Istanbul Weather in January
Turkey · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
January in Istanbul sees average temperatures ranging from a low of 4.3°C (39.7°F) to a high of 9.9°C (49.8°F), with a mean of 7.1°C (44.8°F). Compared to the annual average of 15.3°C (59.5°F), this month is 8.2°C cooler than the yearly norm. This is the coldest month of the year, with average lows of 4.3°C (39.7°F). Precipitation averages 97.7mm, making it approximately 34.0mm wetter than the monthly average of 64.0mm. This is the wettest month of the year, with 97.7mm of precipitation and around 15.8 rainy days. The city receives an average of 5.6 hours of sunshine per day during January, with relative humidity averaging 78.5%. Wind speeds reach an average maximum of 24.0 km/h. Snowfall averages 5.9cm during January, which can affect travel plans and outdoor activities. For travelers, this month offers a coldest month of the year experience in Istanbul, with wetter-than-average conditions compared to the rest of the year.
Istanbul is a city where you can wake up sweating and need a jacket by sunset. I packed for August heat once and froze on a Bosphorus ferry at 9pm. Layers are essential — even summer evenings dip to 19°C with wind off the water. Pack a scarf (useful for mosques anyway). My favorite window is late September to October: 22°C, low humidity, fewer tourists at the Hagia Sophia. Skip February — cold rain, grey skies, many outdoor cafés shuttered. April brings tulip season and the city reawakens.
January vs Adjacent Months
| Metric | December | January | February |
|---|---|---|---|
| Mean Temp | 9.8°C (49.6°F) | 7.1°C (44.8°F) | 7.4°C (45.3°F) |
| Rainfall | 80.4mm | 97.7mm | 73.7mm |
| Sunshine | 5.4 hrs | 5.6 hrs | 7.0 hrs |
| Humidity | 80.9% | 78.5% | 78.1% |
| Wind | 21.3 km/h | 24.0 km/h | 23.4 km/h |
| Rainy Days | 15.6 | 15.8 | 12.4 |
| Snowfall | 0.1 cm | 5.9 cm | 6.8 cm |
Seasonal Context
January falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Istanbul in January, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Istanbul in January?
The average temperature in Istanbul during January ranges from 4.3°C (39.7°F) to 9.9°C (49.8°F), with a mean of 7.1°C (44.8°F).
How much does it rain in Istanbul in January?
Istanbul receives an average of 97.7mm of precipitation in January, spread across approximately 15.8 rainy days. This is the wettest month of the year.
What should I pack for Istanbul in January?
Based on January weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is January a good time to visit Istanbul?
January is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Istanbul
Cities with Similar January Climate (Mediterranean)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 41.01°, 28.98°. Timezone: Europe/Istanbul. Last updated: 2026-07-30.