Weather is probably a major factor when you plan your trip to Sumenep, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually October and November with an average temp of 83°F, while the coldest months are July and August with an average of 81°F. The rainiest months in Sumenep are January, December, February, and March, with each month seeing an average of 12 inches of rainfall.