Weather is probably a major factor when you plan your trip to Tenom, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and May, with an average temperature of 25°C, while the coldest months are January and February, with an average of 24°C. The rainiest months in Tenom are November, May, December and January, with each month seeing an average of 300 mm of rainfall.