If you're looking forward to lots of outings with your partner, check out these details about year-round temperatures in Kuala Selangor: The hottest months are usually May and June with an average temp of 82°F, while the coldest months are January and February with an average of 80°F. The rainiest months in Kuala Selangor are November, December, April, and October, with each month seeing an average of 11 inches of rainfall.