Planning for the weather is a good way to make your trip to Karonga relaxing and enjoyable, especially when you're splurging. The hottest months are usually November and October with an average temp of 77°F, while the coldest months are July and June with an average of 69°F. The rainiest months in Karonga are January, February, March, and December, with each month seeing an average of 12 inches of rainfall.