Marseille has a Mediterranean climate, meaning hot, dry summers and cool, humid winters. Winter weather is affected by the cold Mistral winds from the Rhone Valley, with temperatures averaging around 54°F (12°C) during the day and 39°F (4°C) at night from December to February. Conditions warm to around 63°F (17°C) by mid-May. Summers are usually warm and pleasant, with peak temperatures in July and August ranging from 75°F (24°C) up to as high as 84°F (29°C). The average rainfall is low, and though winter is the wettest part of the year there are only around five days of rain per month during this period. The best time to visit Marseille is between May and October.