In general, the climate is the same as it remains in the rest of southern Europe during the summer months. It is hot and dry most of the time. From June to September the temperature is the highest and decreases gradually making January & February the coldest months. The best time to visit Istanbul, Turkey is in April when the weather is also littler moderate and is the season where in you can see the Tulips bloom. This gives a great view of the natural beauty of Istanbul.