Nestled in the center of the horseshoe-shaped Banderas Bay on mainland Mexico's west coast, Puerto Vallarta enjoys a subtropical climate similar to that of the Hawaiian Islands. At the foothills of the Sierra del Cuale mountain range and surrounded by jungle, you can expect high levels of humidity, especially during the rainy summer months.
Puerto Vallarta's rainy season usually lasts from June through September. According to the World Meteorological Organization, rainfall averages between 10 and 16 inches during those months, but often you'll have nothing more than an afternoon thunderstorm that clears to a beautiful evening. Summer high temperatures usually peak at 90 degrees during the day, with a pleasant low in the mid-70s at night. Puerto Vallarta's location at Banderas Bay protects it from the hurricanes that plague other tropical locations.
Pack plenty of swimwear, T-shirts and sundresses. A light sweater or jacket might be needed as the bay breeze cools the evening air. Sunscreen and a wide-brimmed hat are essential. Throw in a rain poncho and umbrella.
