If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Cachi: The hottest months are usually April and March with an average temp of 66°F, while the coldest months are January and February with an average of 65°F. The rainiest months in Cachi are October, June, August, and September, with each month seeing an average of 24 inches of rainfall.