Weather is probably a major factor when you plan your trip to Wenchi, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and January, with an average temperature of 28°C, while the coldest months are January and August, with an average of 26°C. The rainiest months in Wenchi are September, October, June and May, with each month seeing an average of 220 mm of rainfall.