Taking into account the local weather in Batu Lanchang can help you maximize your time at the pool during your trip. The hottest months are usually March and April with an average temp of 82°F, while the coldest months are January and December with an average of 80°F. The rainiest months in Batu Lanchang are November, October, December, and May, with each month seeing an average of 13 inches of rainfall.