HOTTEST (AVG)
in Türkiye
#2 / 2
Istanbul, Türkiye
The climate in Istanbul is Mediterranean, with annual average temperatures spanning 9°C / 48°F during January up to 28°C / 83°F in August.
Annual rainfall patterns show an average of 58 mm / 2.3 inches per month, with December being the wettest (98 mm / 3.9 inches) and July the driest (20 mm / 0.79 inches).
Sun intensity varies throughout the year, with UV levels reaching 8 in June and falling to 2 in December; strong sun protection is essential during summer months.
The longest days occur in June with around 15.1 hours of daylight, while December has the shortest days at about 9.3 hours.
Whether you prefer warm summers or milder winters, Istanbul provides varied conditions throughout the year.
Today's forecast
Plan your trip
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Climate at a glance
The big-picture stats that matter for planning your visit to Istanbul.
Typical range
High / low
Average highs up to 28.3°C and lows down to 4.3°C.
Rain pattern
Wettest month
December averages 98 mm.
UV
Typical peak band
Typical peak UV is Moderate.
Daylight
Seasonal range
Roughly 9 hrs to 15 hrs.
Wind
Typical strength
Average around 15 km/h, peaking in February.
Humidity
Typical range
Generally 69 % to 78 %.
When should I go?
Our top-rated months for visiting Istanbul, based on long-term weather comfort and conditions
Typical weather by month
Compare all monthsTip: click on a card to see detailed daily weather averages for that month.
How Istanbul compares
See how it ranks against the rest of Türkiye for key metrics.
COOLEST (AVG)
in Türkiye
#1 / 2
WETTEST (TOTAL)
in Türkiye
#2 / 2
WINDIEST (AVG)
in Türkiye
#1 / 2
HIGHEST UV
in Türkiye
#2 / 2
MOST HUMID
in Türkiye
#1 / 2
Short term outlook
Visiting soon? Here's the next 7 days of weather for Istanbul, or see an hourly breakdown for the next 14 days.
Frequently asked questions
How does the weather in Istanbul feel over the year?
On a typical year, you can expect highs around 18°C (64°F) and lows near 12°C (54°F). Conditions usually feel mild in the daytime and cool once the sun goes down. Expect a mix of sun and cloud across the year.
When is the best time to visit Istanbul for dry weather?
When is sun exposure strongest in Istanbul?
UV tends to peak in June, when UV levels are often high (around 8). Regular sunscreen and a hat are recommended.
Is Istanbul a windy place?
Across the year, average winds sit around 15 km/h (9 mph), with gusts on windier days up to about 60 km/h (37 mph). Overall it is it is a notably windy place, and strong gusts are fairly common.
How much daylight does Istanbul get?
On average, days offer about 12 hours of daylight. Daylight is fairly typical, with enough time for sightseeing.