Weather will likely play an important role when you plan your trip to Ruhengeri, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July with an average temp of 63°F, while the coldest months are November and December with an average of 62°F. The rainiest months in Ruhengeri are April, November, October, and March, with each month seeing an average of 13 inches of rainfall.