If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Extrema: The hottest months are usually September and February with an average temp of 68°F, while the coldest months are July and June with an average of 61°F. The rainiest months in Extrema are January, December, February, and November, with each month seeing an average of 11 inches of rainfall.