Planning for the weather is a good way to make your trip to Mili relaxing and enjoyable, especially when you're splurging. The hottest months are usually September and October with an average temp of 83°F, while the coldest months are February and March with an average of 82°F. The rainiest months in Mili are May, July, June, and April, with each month seeing an average of 17 inches of rainfall.