Planning for the weather is a good way to make your trip to Mwanza relaxing and enjoyable, especially when you’re splurging. The hottest months are usually February and July, with an average temperature of 23°C, while the coldest months are July and May, with an average of 23°C. The rainiest months in Mwanza are November, April, December and October, with each month seeing an average of 263 mm of rainfall.