Weather is probably a major factor when you plan your trip to Bojonegoro, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and October, 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 Bojonegoro are February, March, December and January, with each month seeing an average of 383 mm of rainfall.