If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Wasa: The hottest months are usually July and August with an average temp of 60°F, while the coldest months are December and February with an average of 21°F. The snowiest months in Wasa are January, December, February, and March, with each month seeing an average of 8 inches of snowfall.