The trullo, given its dominant position (about 400 meter above s.l.), is often ventilated.
Winds of Mistral and Tramontane (North/North West) that with their more fresh and dry air make the South hot weather well bearable even during main heat hours of the day. While at night, even in the summer months, often you might will wear a light sweatshirt or cotton sweater.
Wind of Sirocco (South-East) with its warm, moist air can give you muggy days that thanks to the pool will be more enjoyable and really perfect evenings, when he generally declines.
It rains very little, and generally it's just a short shower. It can of course also happen to have one or more cloudy and rainy days, but they are not the rule.