Istanbul Weather in January
In January, Istanbul averages a high of 9°C (49°F) and a low of 4°C (39°F), from 43 years of daily records (1971–2025).
9°C
Average high
49°F
4°C
Average low
39°F
22°C
Record high
71°F · January 3, 1971
-8°C
Record low
18°F · January 4, 1979
What January Is Like in Istanbul
- January in Istanbul has become 1.9°C (3.4°F) warmer on average: the 2011–2025 average against 1970–1989.
- 6 of the 10 warmest Januarys on record in Istanbul have come since 2011.
- January 2025 was the 3rd warmest January in 43 years of records, 2.9°C (5.2°F) above the long-run average.
- The January heat record, 22°C (71°F) on January 3, 1971, has stood for 54 years.
At least 1 mm of rain falls on 65% of January days.
Warmest: 2021 (13.2°C)Latest: 2025 (12.9°C)10-year averageLong-run average (9.4°C)
Look Up a Day in January
See the weather in Istanbul on any January date, year by year.
Source: NOAA GHCN-Daily, Istanbul (1971–2007); Istanbul Bolge (Kartal) (2014–2025). Averages cover 1971–2025. How we compute this