If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Guchan: The hottest months are usually August and July with an average temp of 58°F, while the coldest months are February and January with an average of 35°F. The rainiest months in Guchan are June, November, May, and April, with each month seeing an average of 8 inches of rainfall.