Weather is probably a major factor when you plan your trip to Rangkasbitung, 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 27°C, while the coldest months are August and February, with an average of 27°C. The rainiest months in Rangkasbitung are March, December, February and January, with each month seeing an average of 311 mm of rainfall.