Weather is probably a major factor when you plan your trip to Sumenep, but bear 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 temperature of 28°C, while the coldest months are July and August, with an average of 27°C. The rainiest months in Sumenep are January, December, February and March, with each month seeing an average of 305 mm of rainfall.