Planning for the weather is a good way to make your trip to Aquitania relaxing and enjoyable, especially when you're splurging. The hottest months are usually January and February, with an average temperature of 13°C, while the coldest months are August and September, with an average of 13°C. The rainiest months in Aquitania are April, May, October and March, with each month seeing an average of 485 mm of rainfall.