Mbanza-Ngungu: are you wondering about the weather you might find during your holiday? Befor organizing a holiday we always think about the wheather we might find when we get there. In Mbanza-Ngungu the average yearly temperature is 24°C. During the hottest month, which in this case is September, the temperature can get up to 26°C. Instead the coldest month is June, reaching a minimum temperature of 23°C.