Planning for the weather is a good way to make your trip to Bandung relaxing and enjoyable, especially when you’re splurging. The hottest months are usually September and October with an average temp of 74°F, while the coldest months are July and August with an average of 73°F. The rainiest months in Bandung are November, December, March, and April, with each month seeing an average of 20 inches of rainfall.