If you're hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Jabi: The hottest months are usually March and February with an average temp of 87°F, while the coldest months are August and September with an average of 78°F. The rainiest months in Jabi are August, September, July, and June, with each month seeing an average of 11 inches of rainfall.