August in Port Alsworth is the rainiest month of the year. In August, the weather in Port Alsworth is typically warm. Average daily high temperature in August is about 11 degrees above zero. On average, Port Alsworth has 27 rainy, 2 sunny, and 2 cloudy days in August. The rains are usually moderate. August as well as May, June, July, and September is considered the most uncomfortable time to visit Port Alsworth.