Summers are hot, with July being the hottest month. Temperatures can easily surpass 100 F/38 C, but 89-93 F/32-34 C is more the norm.
Spring and fall tend to be mild, but don't be surprised to see the odd 80 F/27 C day even in April. A good time to visit is in late September or October—the sky is clear, the vineyards are in harvest, and the long, hot, muggy summer is over. Rain tends to be infrequent but heavy; it is most common in February and March and in the fall.
Although winter temperatures are not very low, dampness makes the cold penetrating. Winter temperatures can drop to just below freezing at night and warm up to 46-50 F/8-10 C during the day. Snow is rare.