If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Port Gentil: The hottest months are usually March and April, with an average temperature of 27°C, while the coldest months are July and August, with an average of 24°C. The rainiest months in Port Gentil are November, December, October and January, with each month seeing an average of 373 mm of rainfall.