Planning for the weather is a good way to make your trip to Jambi relaxing and enjoyable, especially when you're splurging. The hottest months are usually September and August with an average temp of 80°F, while the coldest months are July and January with an average of 79°F. The rainiest months in Jambi are November, April, December, and March, with each month seeing an average of 12 inches of rainfall.