If you're hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Bungoma: The hottest months are usually February and March with an average temp of 70°F, while the coldest months are June and July with an average of 67°F. The rainiest months in Bungoma are April, May, November, and October, with each month seeing an average of 10 inches of rainfall.