Planning for the weather is a good way to make your trip to Manu relaxing and enjoyable, especially when you're splurging. The hottest months are usually September and August, with an average temperature of 25°C, while the coldest months are July and June, with an average of 24°C. The rainiest months in Manu are March, January, February and December, with each month seeing an average of 316 mm of rainfall.