If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Cape Tribulation: The hottest months are usually December and January with an average temp of 79°F, while the coldest months are August and July with an average of 70°F. The rainiest months in Cape Tribulation are January, March, February, and December, with each month seeing an average of 12 inches of rainfall.