Istanbul
has a good weather around spring and autumn , from April to May and from September to October , so these are the best times you can visit Istanbul . In spring and autumn , the temperature is usually around 15-25 degrees (59-77 Fahrenheit) . On the other hand , during summer and specially on July and August , the weather is hot with humidity . Temperature during summer can go up to 30 degrees Celsius (86 degrees Fahrenheit) , and highest recorded temperature in the city was 45 degrees (113 Fahrenheit) . In these months of summer , the west and south coasts have better weather . In winter , there are often Chill winter winds , with a temperature around 10 degrees (50 Fahrenheit) . Nighttime in winter are usually much colder than daytime . Some snow also can appear during winter , but it's not more than 10-12 days during the whole winter season .