Planning for the weather is a good way to make your trip to Kumasi relaxing and enjoyable, especially when you’re splurging. The hottest months are usually January and February with an average temp of 82°F, while the coldest months are August and July with an average of 76°F. The rainiest months in Kumasi are September, June, October, and May, with each month seeing an average of 8 inches of rainfall.