The climate in İstanbul during May can be summarized as mild and reasonably dry.
May is in the spring in İstanbul and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 21°C (69°F), whilst at night 12°C (53°F) is normal.
|Daytime temperature||20.5°C 68.9°F|
|Nightly temperature||11.7°C 53.1°F|
|Average temperature||16.1°C 61°F|
|Daily sunshine||10.5 hrs|
|Avg rainfall||35 mm 1.4 ins|
|Rainy days||8 days|
|Sea temperature||15.3°C 59.6°F|
|Windspeed||9.4kph 6 mph|
On average May is the 4th driest month of the year in İstanbul with around 35mm 1.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 10.5 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in May 2019.
|Hottest month:||August||26.8°C 80.2°F|
|Driest month:||July||25mm 1ins|
|Coldest month:||January||8°C 46.4°F|
|Wettest month:||December||126mm 5ins|