When you're planning your getaway to Phumĭ Dei Krâhâm, be sure to take into account the year-round temperatures. The hottest months are usually March and April with an average temp of 85°F, while the coldest months are January and December with an average of 81°F. The rainiest months in Phumĭ Dei Krâhâm are September, October, May, and August, with each month seeing an average of 10 inches of rainfall.