Weather is probably a major factor when you plan your trip to Simpang, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually June and May with an average temp of 80°F, while the coldest months are January and December with an average of 79°F. The rainiest months in Simpang are November, December, October, and April, with each month seeing an average of 12 inches of rainfall.