If you're hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Tolú: The hottest months are usually February and March with an average temp of 82°F, while the coldest months are November and December with an average of 80°F. The rainiest months in Tolú are October, August, September, and June, with each month seeing an average of 10 inches of rainfall.