Weather is probably a major factor when you plan your trip to Cianjur, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and August, with an average temperature of 24°C, while the coldest months are July and August, with an average of 24°C. The rainiest months in Cianjur are November, April, March and December, with each month seeing an average of 408 mm of rainfall.