Verdict: Fair month
Istanbul Weather in January
January is mild-to-cool in Istanbul, topping out near 10°C (50°F) — comfortable with a layer on. Expect showers on roughly 12 days of the month — rarely trip-ruining, worth planning around. January is workable in Istanbul if your dates are fixed — just plan around the conditions.
Average high
10°C / 50°F
Average low
4°C / 39°F
Rain days
~12
Precipitation
98 mm
What to pack for Istanbul in January
- A proper warm jacket, and a hat for mornings
- Rain gear is non-negotiable — expect rain on roughly 12 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
January against the rest of the year
Warmest in Istanbul: Aug (30°C / 86°F) · Coolest: Jan (10°C / 50°F) · Wettest: Mar (~13 rain days)
10°
4°
Jan
11°
4°
Feb
12°
5°
Mar
17°
9°
Apr
21°
12°
May
26°
18°
Jun
29°
21°
Jul
30°
21°
Aug
26°
18°
Sep
21°
14°
Oct
16°
10°
Nov
13°
7°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)