August in Kodiak is the rainiest month of the year. In August, the weather in Kodiak is typically warm. Average daily high temperature in August is about 13 degrees above zero. On average, Kodiak has 21 rainy, 5 sunny, 3 cloudy, and 2 partly cloudy days in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Kodiak.