Weather will likely play an important role when you plan your trip to Manu, but bear in mind that cheaper options are usually available when the weather isn't as good. 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.