Hot and humid weather prevails in Acapulco, with temperatures hovering at 30°C (86°F) year-round and sunshine guaranteed virtually every day. During the rainy season, June through October, the late afternoon and nights often bring welcome, cooling showers.
Any time of the year is good for a visit, but perhaps the best is in October or November, right after the rainy season. The crowds are small, the prices reasonable, and the hills green from summer rains. As winter and spring roll around, most of the vegetation turns brown.
Of course, watching a summer squall over the Pacific from your hotel balcony, cold beverage in hand, is a singular Mexico experience.