Weather in Istanbul
Istanbul has a temperate oceanic climate which is influenced by a continental climate, with hot and humid summers and cold, wet and occasionally snowy winters.
Winter is cold and wet, averaging 2ºC at night and 7ºC during the day. Although rarely below freezing during the day, high relative humidity levels and the wind chill makes it feel bitterly cold and very unpleasant.
Snowfall, which occurs almost annually, is common between the months of December and March, with an annual total snow cover of almost three weeks, but average winter snowfall varies considerably from year to year, and snow cover usually remains only for a few days after each snowfall, even under intense snow conditions.
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.
For visitors an umbrella is recommended during spring, autumn and winter, and during the summer to avoid the sun and occasionally the rain. However, it’s not such a big problem, since streets of Istanbul are suddenly filled by umbrella sellers as soon as it starts raining.