If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Salatiga: The hottest months are usually September and October with an average temp of 76°F, while the coldest months are July and August with an average of 75°F. The rainiest months in Salatiga are February, January, March, and December, with each month seeing an average of 23 inches of rainfall.