Weather will likely play an important role when you plan your trip to Bourg-en-Bresse, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 19°C, while the coldest months are January and February, with an average of 4°C. Average annual precipitation for Bourg-en-Bresse is 1218 mm.