Planning for the weather is a good way to make your trip to Brazzaville relaxing and enjoyable, especially when you're splurging. The hottest months are usually September and August, with an average temperature of 26°C, while the coldest months are July and June, with an average of 25°C. The rainiest months in Brazzaville are November, December, April and October, with each month seeing an average of 211 mm of rainfall.