If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Warri: The hottest months are usually January and February, with an average temperature of 28°C, while the coldest months are July and August, with an average of 25°C. The rainiest months in Warri are October, July, September and June, with each month seeing an average of 394 mm of rainfall.