Planning for the weather is a good way to make your trip to Kasulu relaxing and enjoyable, especially when you're splurging. The hottest months are usually September and August, with an average temperature of 25°C, while the coldest months are July and January, with an average of 24°C. The rainiest months in Kasulu are April, December, March and November, with each month seeing an average of 331 mm of rainfall.