If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Austevoll: The hottest months are usually August and July, with an average temperature of 13°C, while the coldest months are February and January, with an average of 2°C. The snowiest months in Austevoll are January, February, December and March, with each month seeing an average of 18 cm of snowfall.