If you're hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Chugchilan: The hottest months are usually May and August with an average temp of 52°F, while the coldest months are September and August with an average of 51°F. The rainiest months in Chugchilan are March, November, December, and February, with each month seeing an average of 16 inches of rainfall.