The conquering armies of ancient times tended to ransack the city rather than endow it with artistic treasures, but all that changed with the Byzantines, who adorned their churches and palaces with mosaics and frescoes. Summers are relatively dry, but rainfall is significant during that season. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Istanbul area. Although dates differ from year to year, you can enjoy four seasons in Istanbul. March is in the spring in İstanbul and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 11°C (52°F), whilst at night 4°C (39°F) is normal. What's the Weather like in Istanbul in June Temperature . Summer: In summer, the weather in Istanbul is hot and humid, with the temperature in July and August averaging 27°C. The annual rainfall is 747 mm | 29.4 inch. Bookmark this location to check the time and temperature with forecast and current weather conditions in Istanbul, Turkey before making travel plans for a hotel or flight to Istanbul, Turkey Whether is it rainy or sunny, chilly or warm, you'll know before you pick up your phone. Extreme heat, however, is uncommon, as temperatures … Istanbul can best be visited in spring (May and June) or autumn (September and October) with temperatures between 22 and 30 degrees Celsius (76 & 86° Fahrenheit). These temperatures are far removed from those records observed in Istanbul in the month of march with a maximum record of 76°F in 2009 and a minimum record of 31°F in 2018. The climate is relatively cool around this city the month of february, but it is tolerable by dressing hot. March is quite cool and rainy. June is the start of summer in Istanbul.While there may be a little rainfall, as Turkey generally receives some rain year round, in general visitors can expect long, hot, dry days. Temperatures are up to 56°F. Average rainfall is 787 millimeters a year (31 inches). The city drowns in lush greenery and dotted by flowerbeds with blooming tulips. Temperature ranges for first spring month are between 11 °C (52 °F) and 5 … There is more rainfall in the winter than in the summer in Istanbul. Planning in Istanbul, Turkey. The average temperature in June in Istanbul is 22C, with highs of 26C and overnight lows of 19C. The average temperature in Istanbul is 14.1 °C | 57.3 °F. Comparing to Mediterranean localities spring in Istanbul is cool, but it is very sunny. During summer it tends to be to hot to visit the city with average temperatures between 30 and 35 degrees Celsius (86 & 95° Fahrenheit). Istanbul Weather Forecasts. Average temperature in Istanbul, in a year, is around 14 degrees (57 Fahrenheit) with average relative humidity of 76%. 35% of the rainfall occurs in winter, 23% in spring, 14% in summer, and 28% in autumn. This location is classified as Csa by Köppen and Geiger.