If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Palu: The hottest months are usually October and May, with an average temperature of 26°C, while the coldest months are July and August, with an average of 26°C. The rainiest months in Palu are June, May, July and November, with each month seeing an average of 360 mm of rainfall.