August in Punta-Arenas is the sunniest month of the year. In August, the weather in Punta-Arenas is typically cold. Average daily high temperature in August is about 6 degrees above zero. On average, Punta-Arenas has 12 rainy, 11 partly cloudy, 7 sunny, and 1 cloudy day in August. The rains are usually moderate. August as well as January, February, March, and April is considered the most uncomfortable time to visit Punta-Arenas.