If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Pasuruan: The hottest months are usually October and September with an average temp of 82°F, while the coldest months are July and August with an average of 80°F. The rainiest months in Pasuruan are January, February, March, and December, with each month seeing an average of 15 inches of rainfall.