Temperature range
Typical highs and lows
High28.3°C
Low4.3°C
The broad yearly range between warm daytime highs and the coolest overnight lows.
Türkiye 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.
Trip planning
Plan your trip
Find the best dates. Understand the conditions. Pack with confidence.
Climate overview
Climate at a glance
The big-picture stats that matter for planning your visit to Istanbul.
Rain pattern
Wettest point of the year
98 mm
December carries the highest typical rainfall load.
Sun exposure
Typical peak UV band
Moderate (5.6)
A fast read on how strong midday sun typically gets across the year.
Daylight window
Seasonal daylight range
9 hrsto15 hrs
Useful for gauging how much sightseeing time you get in shorter versus longer seasons.
Wind profile
Typical breeze strength
15 km/h
February is typically the breeziest month.
Humidity
Typical moisture range
69 %to78 %
A quick signal for how dry, comfortable, or heavy the air tends to feel.
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.
HOTTEST (AVG)
in Türkiye
#2 / 2
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.
Travel planning FAQ
Frequently asked questions
Quick answers to the weather questions you ask the most.
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.