Weather will likely play an important role when you plan your trip to Rumah Gadong, but bear in mind that cheaper options are usually available when the weather isn’t as good. The hottest months are usually May and August, with an average temperature of 27°C, while the coldest months are February and March, with an average of 26°C. The rainiest months in Rumah Gadong are November, December, January and October, with each month seeing an average of 368 mm of rainfall.