Taking the local weather in Lumban Julu into account can help you maximise your time at the pool during your trip. The hottest months are usually June and July, with an average temperature of 24°C, while the coldest months are January and February, with an average of 23°C. The rainiest months in Lumban Julu are November, December, October and September, with each month seeing an average of 420 mm of rainfall.