Taking the local weather in Sonthonnax-la-Montagne into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. 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 Sonthonnax-la-Montagne is 1220 mm.