Late spring (late May to early June) and early autumn (late September to early October) are very pleasant and therefore the best times to visit the city.
During these periods it is neither cold nor hot, and still sunny, though the nights can be chilly and rain is common.
Istanbul has a high annual average rainfall of 844mm (which is more than that of London, Dublin or Brussels, whose negative reputation Istanbul does not suffer), with late autumn and winter being the wettest, and late spring and summer being the driest.
Although late spring and summer are relatively dry when compared to the other seasons, rainfall is significant during these seasons, and there is no dry season as a result.
Summer is also the driest season, but it does infrequently rain.