Planning for the weather is a good way to make your trip to Timbulharjo relaxing and enjoyable, especially when you're splurging. The hottest months are usually April and May with an average temp of 80°F, while the coldest months are August and July with an average of 78°F. The rainiest months in Timbulharjo are December, January, February, and November, with each month seeing an average of 14 inches of rainfall.