If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Sorong: The hottest months are usually October and May, with an average temperature of 27°C, while the coldest months are July and August, with an average of 26°C. The rainiest months in Sorong are April, May, March and June, with each month seeing an average of 402 mm of rainfall.