If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in La Possession: The hottest months are usually February and January with an average temp of 79°F, while the coldest months are August and July with an average of 71°F. The rainiest months in La Possession are January, February, March, and December, with each month seeing an average of 10 inches of rainfall.