If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Gudvangen: The hottest months are usually July and August with an average temp of 53°F, while the coldest months are January and February with an average of 26°F. The rainiest months in Gudvangen are December, October, January, and November, with each month seeing an average of 12 inches of rainfall.