Le Bourget-du-Lac is right on the boundary between a mid-latitude, four seasons humid subtropical climate (Cfa) and an oceanic climate (Cfb) under the Köppen system. In spite of this, it is highly influenced by its interior position within France, near several mountain ranges, resulting in quite hot summers and winters with frequent temperatures below freezing, especially at night. Convective rainfall is frequent for much of the year, rendering high precipitation/day quotas. The nearest weather station is located at Chambéry Airport, 3 km east of the town.
Climate data for Le Bourget-du-Lac (Chambéry Airport, altitude 235m,[3] 1991–2020 normals, extremes 1973–present)