Phu Kradung is a cool and comfortable all year round. The average temperature is 15 degrees celsius. In the cool season, temperatures of the coldest nights reaches feezing. In the rainy season, the weather can change quicky. Fog and low clouds tend to hang low over the landscape. Cliffs may collapse under their own weight after the soil which underlies the sandstone cap is eroded by heavy rain. Heavy rains can also cause flash floods in the streams which run down the mountain. Thus, the park will be closed during June and September every year for visitors safety and forest recovering.