If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Ngozi: The hottest months are usually August and September, with an average temperature of 19°C, while the coldest months are June and May, with an average of 18°C. The rainiest months in Ngozi are November, April, December and October, with each month seeing an average of 236 mm of rainfall.