Verdict: Excellent month
Istanbul Weather in August
August runs warm in Istanbul, with daily highs around 30°C (86°F) and nights near 21°C (70°F). Rain is occasional — about 4 wet days in a typical year. Overall, August is one of the best months of the year to be in Istanbul.
Average high
30°C / 86°F
Average low
21°C / 70°F
Rain days
~4
Precipitation
20 mm
What to pack for Istanbul in August
- Light, breathable clothing — linen and technical fabrics earn their keep
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Comfortable walking shoes — every guide on this site assumes you'll use them
August 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)