If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Palm Island: The hottest months are usually December and January, with an average temperature of 26°C, while the coldest months are July and August, with an average of 19°C. The rainiest months in Palm Island are January, February, March and December, with each month seeing an average of 304 mm of rainfall.