When you're dreaming of a escape to Nyanza-Lac, year-round temperatures and rainfall may be important factors to consider. The hottest months are usually September and August, with an average temperature of 25°C, while the coldest months are July and January, with an average of 24°C. The rainiest months in Nyanza-Lac are April, December, March and November, with each month seeing an average of 331 mm of rainfall.