İstanbul monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at İstanbul

İstanbul average temperature chart (Celsius) İstanbul average temperature chart (Fahrenheit)
Average monthly temperatures in İstanbul (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8 8.6 10.7 15.7 20.3 24.9 26.8 26.8 23.9 19 14.7 10.5
°F 46.4 47.5 51.2 60.3 68.5 76.8 80.3 80.2 75 66.2 58.5 50.9

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

İstanbul monthly rainfall chart (mm) İstanbul monthly rainfall chart (inches)
Average monthly rainfall in İstanbul (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 110 75 72 50 35 29 25 35 43 76 97 126
inches 4.3 2.9 2.8 2 1.4 1.1 1 1.4 1.7 3 3.8 5
Rainy days 18 16 14 11 8 6 4 5 6 11 14 17

Average daily sunshine

The bar chart below shows the average daily sunshine hours in İstanbul

İstanbul average daily sunshine chart
Average daily sunshine İstanbul
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.2 6 6.6 8.4 10.5 12 12.7 11.3 9.7 7 5.4 4.7

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

İstanbul average minimum / maximum temperatures (Celsius) İstanbul average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in İstanbul (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 2.5 2.9 4 7.5 11.7 15.7 18.2 18.4 15.5 11.8 8.4 5
Max °C 8.2 8.8 10.9 15.9 20.5 25.1 27.1 27 24.1 19.2 14.9 10.7
Min °F 36.4 37.1 39.1 45.5 53.1 60.3 64.7 65.1 59.9 53.2 47 40.9
Max °F 41.5 42.4 45.3 53.1 61 68.7 72.7 72.9 67.6 59.9 52.9 46

Sea temperature

The graph below shows the average sea temperature.

İstanbul average sea temperature chart (Celsius) İstanbul average sea temperature chart (Fahrenheit)
Average sea temperature around İstanbul in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.5 7.5 7.9 10.4 15.3 20.7 23.6 24.6 22.5 18.8 14.4 10.9
°F 47.4 45.6 46.2 50.7 59.6 69.3 74.5 76.2 72.6 65.8 58 51.7

Wind speed

The graph below shows the average wind speed.

İstanbul average winspeed by month (km/h) İstanbul average winspeed by month (mph)
Average wind speed in İstanbul (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 13 13 12 10 9 9 11 12 11 12 11 13
mph 8 8 7 6 6 6 7 7 7 7 7 8

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

İstanbul relative humidity averages
Average relative humidity in İstanbul
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
79% 77% 77% 75% 75% 72% 71% 72% 74% 76% 77% 78%
İstanbul

Other monthly averages

UV index Best time to go?

İstanbul weather stats

İstanbul weather statistics
Hottest month: August 26.8°C 80.2°F
Driest month: July 25mm 1ins
Sunniest month: July 12.7hrs
Coldest month: January 8°C 46.4°F
Wettest month: December 126mm 5ins
Warmest sea: August 24.6°C 76.3°F
Map showing location of İstanbul (41.01384, 28.94966)

Locations nearby

Top Turkey locations

Change units