August in Arvidsjaur is the sunniest month of the year. In August, the weather in Arvidsjaur is typically warm. Average daily high temperature in August is about 14 degrees above zero. On average, Arvidsjaur has 16 rainy, 7 sunny, 7 partly cloudy, and 1 cloudy day in August. The rains are usually moderate. August as well as January, April, May, and June is considered the most uncomfortable time to visit Arvidsjaur.