If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Oberaichwald: The hottest months are usually July and August with an average temp of 62°F, while the coldest months are January and February with an average of 31°F. The rainiest months in Oberaichwald are August, July, May, and September, with each month seeing an average of 8 inches of rainfall.