Weather is probably a major factor when you plan your trip to Mojokerto, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually October and September with an average temp of 82°F, while the coldest months are July and August with an average of 79°F. The rainiest months in Mojokerto are February, January, March, and December, with each month seeing an average of 17 inches of rainfall.