If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Malang: The hottest months are usually October and September with an average temp of 74°F, while the coldest months are October and January with an average of 74°F. The rainiest months in Malang are January, February, December, and March, with each month seeing an average of 29 inches of rainfall.