Istanbul Weather
Istanbul weather today, the 14-day forecast, and average temperature, rain and what to wear for every month — compared against Hong Kong. Best months to visit: Apr, May, Jun, Jul, Aug, Sep, Oct and Nov.
Istanbul current weather
Istanbul now (local time 11:45)
19°C
Partly cloudy
- Feels like
- 17°
- Humidity
- 57%
- Wind
- 21 km/h
Next 7 days · what to wear
15° – 25°C
Mostly dry all week
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.
Istanbul 14-day forecast
Today
10/4
⛅
20°
16°
💧0%
Mon
10/5
⛅
21°
16°
💧0%
Tue
10/6
☁️
21°
15°
💧0%
Wed
10/7
☁️
21°
15°
💧0%
Thu
10/8
⛅
20°
15°
💧5%
Fri
10/9
🌤️
24°
16°
💧5%
Sat
10/10
⛅
25°
17°
💧15%
Sun
10/11
☁️
23°
16°
💧13%
Mon
10/12
🌤️
21°
15°
💧12%
Tue
10/13
⛅
21°
15°
💧10%
Wed
10/14
☁️
23°
14°
💧18%
Thu
10/15
☁️
22°
13°
💧34%
Fri
10/16
🌦️
25°
18°
💧20%
Sat
10/17
🌦️
17°
11°
💧22%
Best time to visit Istanbul
On temperature and rainfall, the most comfortable months in Istanbul are Apr, May, Jun, Jul, Aug, Sep, Oct and Nov. The hottest month is August (average high 29°C) and the coldest is January (average low 4°C).
Istanbul climate by month
| Month | Avg high | Avg low | Rain | Humidity | vs Hong Kong |
|---|---|---|---|---|---|
| Jan | 8°C | 4°C | 79 mm | 83% | -11°C |
| Feb | 9°C | 4°C | 68 mm | 82% | -11°C |
| Mar | 12°C | 6°C | 53 mm | 79% | -11°C |
| AprBest | 16°C | 9°C | 42 mm | 76% | -11°C |
| MayBest | 21°C | 14°C | 35 mm | 74% | -9°C |
| JunBest | 26°C | 19°C | 36 mm | 69% | -6°C |
| JulBest | 29°C | 22°C | 20 mm | 66% | -4°C |
| AugBest | 29°C | 22°C | 22 mm | 66% | -3°C |
| SepBest | 25°C | 19°C | 54 mm | 68% | -6°C |
| OctBest | 20°C | 14°C | 70 mm | 76% | -9°C |
| NovBest | 15°C | 10°C | 63 mm | 80% | -10°C |
| Dec | 10°C | 6°C | 82 mm | 82% | -10°C |
Data: NASA POWER 2001–2020 climatology (MERRA-2, elevation-corrected); Hong Kong comparison uses HKO 1991–2020 normals.
Istanbul weather month by month: what to wear
Istanbul in OctoberBest monthThis month
October in Istanbul is mild and cool: average highs of 20°C and lows of 14°C, around 70 mm of rain (mostly dry) and 76% humidity — about 9°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Long sleeves with a light jacket or sweater.
Istanbul in NovemberBest month
November in Istanbul is chilly: average highs of 15°C and lows of 10°C, around 63 mm of rain (mostly dry) and 80% humidity — about 10°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Long sleeves with a light jacket or sweater.
Istanbul in December
December in Istanbul is chilly: average highs of 10°C and lows of 6°C, around 82 mm of rain (some rain) and 82% humidity — about 10°C colder than Hong Kong.
👕 A sweater plus a coat or windbreaker.
Istanbul in January
January in Istanbul is cold: average highs of 8°C and lows of 4°C, around 79 mm of rain (mostly dry) and 83% humidity — about 11°C colder than Hong Kong.
👕 A warm coat over a sweater, plus a scarf.
Istanbul in February
February in Istanbul is cold: average highs of 9°C and lows of 4°C, around 68 mm of rain (mostly dry) and 82% humidity — about 11°C colder than Hong Kong.
👕 A warm coat over a sweater, plus a scarf.
Istanbul in March
March in Istanbul is chilly: average highs of 12°C and lows of 6°C, around 53 mm of rain (mostly dry) and 79% humidity — about 11°C colder than Hong Kong.
👕 A sweater plus a coat or windbreaker.
Istanbul in AprilBest month
April in Istanbul is chilly: average highs of 16°C and lows of 9°C, around 42 mm of rain (mostly dry) and 76% humidity — about 11°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Long sleeves with a light jacket or sweater.
Istanbul in MayBest month
May in Istanbul is pleasantly warm: average highs of 21°C and lows of 14°C, around 35 mm of rain (mostly dry) and 74% humidity — about 9°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.
Istanbul in JuneBest month
June in Istanbul is warm to hot: average highs of 26°C and lows of 19°C, around 36 mm of rain (mostly dry) and 69% humidity — about 6°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves, plus a light layer for air-conditioned interiors.
Istanbul in JulyBest month
July in Istanbul is warm to hot: average highs of 29°C and lows of 22°C, around 20 mm of rain (dry) and 66% humidity — about 4°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves, plus a light layer for air-conditioned interiors.
Istanbul in AugustBest month
August in Istanbul is warm to hot: average highs of 29°C and lows of 22°C, around 22 mm of rain (dry) and 66% humidity — about 3°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves, plus a light layer for air-conditioned interiors.
Istanbul in SeptemberBest month
September in Istanbul is pleasantly warm: average highs of 25°C and lows of 19°C, around 54 mm of rain (mostly dry) and 68% humidity — about 6°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves, plus a light layer for air-conditioned interiors.
FAQ
›What is the best time to visit Istanbul?
On temperature and rainfall, the most comfortable months in Istanbul are Apr, May, Jun, Jul, Aug, Sep, Oct and Nov. The hottest month is August (average high 29°C) and the coldest is January (average low 4°C).
›What's the weather like in Istanbul in October, and what should I wear?
October in Istanbul is mild and cool: average highs of 20°C and lows of 14°C, around 70 mm of rain (mostly dry) and 76% humidity — about 9°C colder than Hong Kong. It's one of the most comfortable months of the year to visit. What to wear: Long sleeves with a light jacket or sweater.
›What's the weather like in Istanbul in November, and what should I wear?
November in Istanbul is chilly: average highs of 15°C and lows of 10°C, around 63 mm of rain (mostly dry) and 80% humidity — about 10°C colder than Hong Kong. It's one of the most comfortable months of the year to visit. What to wear: Long sleeves with a light jacket or sweater.
›When is the rainy season in Istanbul?
Istanbul is wettest in December, with about 82 mm on average, and driest in July, with about 20 mm.
›How cold does Istanbul get? Does it snow?
The coldest month is January, averaging 8°C by day and 4°C at night. Early mornings get close to freezing; snow is occasional.
Planning a trip to Istanbul?
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Forecast data: Open-Meteo.com (CC BY 4.0), refreshed every 3 hours. Hottest month: August; coldest: January.