If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Oygarden: The hottest months are usually August and July with an average temp of 56°F, while the coldest months are February and January with an average of 36°F. The snowiest months in Oygarden are January, February, December, and March, with each month seeing an average of 7 inches of snowfall.