If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Kampong Raja: The hottest months are usually May and June with an average temp of 81°F, while the coldest months are February and January with an average of 77°F. The rainiest months in Kampong Raja are December, November, January, and October, with each month seeing an average of 18 inches of rainfall.