If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Proserpine: The hottest months are usually February and January, with an average temperature of 27°C, while the coldest months are July and August, with an average of 21°C. The rainiest months in Proserpine are March, January, February and December, with each month seeing an average of 278 mm of rainfall.