In August, the weather in Laugarvatn is typically warm. Average daily high temperature in August is about 12 degrees above zero. On average, Laugarvatn has 17 rainy, 5 cloudy, 5 partly cloudy, and 4 sunny 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 Laugarvatn.