ISTANBUL IS A WONDER OF NATURE AND MANKIND WITH ALL KIND OF WEATHER ...
SHINING UNDER THE SUN ,LAUGHING AND CRYING UNDER THE RAIN , WRITING ITS POEMS UNDER THE SNOW AND WHISPERING WITH THE WIND .....
Turkish State web-site : in english and german and very helpfull and trustable. 5 days forecasts .Maps and Charts.
Istanbul residents wondering what the next day’s weather will bring need only to look toward their city’s historical Beyazıt Tower, which is once again being lit up in different colors depending on the forecast.
As of Monday, the tower on the historic peninsula will be bathed in blue light when the weather promises to be clear and sunny. Green means rain is in the forecast, yellow indicates fog and red warns of snow
This is a very detailed web site ..I use it to foresee how much snow we are going to have in winter ...and istanbul with snow is magic....
Always reliable...as usual !!!The BBC weather has a lot of additional info and the online satellite view ...
http://www.meteoblue.com/en_GB/point/forecast/tab/b/pictocastDaily/f/36942/c/tr
Wonderful graphic and a lot of infos...and maps