Planning for the weather is a good way to make your trip to Umuahia relaxing and enjoyable, especially when you're splurging. The hottest months are usually February and January, with an average temperature of 28°C, while the coldest months are August and July, with an average of 26°C. The rainiest months in Umuahia are September, July, August and October, with each month seeing an average of 391 mm of rainfall.