Due to its topology, climate in Bandung is relatively cooler throughout the year than most of Indonesian cities. The average annual rainfall ranges from 1,000 milimetres in the middle and the southeast region to 3,500 milimetres in the north of the city. The wet season conforms with other Indonesian regions, around November to April. The average temperature is 18°C - 26 °C, cooler than most Indonesian cities.

Source : www.bandungtourism.com