Ambérieu-en-Bugey (ɑ̃beʁjø ɑ̃ byʒɛ, byʒe; Ambèriô) is a commune in the department of Ain, region of Auvergne-Rhône-Alpes, France. It is the largest town in the arrondissement of Belley and the capital of the Canton of Ambérieu-en-Bugey which consists of 8 communes with a total of 21,226 inhabitants in 2007 with 17,466 inhabitants in its own urban area in 2010. It is also the capital of the historic region of Bugey. Its inhabitants are known as Ambarrois or Ambarroises. The town was called Ambérieu until 31 March 1955 when it became Ambérieu-en-Bugey. The town is known for being an important railway junction, but also for winning the Croix de guerre 1939-1945 with citation at the Liberation. Ambérieu-en-Bugey is 50 km north-east of Lyon, 30 km south of Bourg-en-Bresse, 73 km northwest of Aix-les-Bains, 76 km southeast of Mâcon, and 104 km west of Geneva. The town is in the commune's western part, on the right bank of the river Albarine, which forms most of the commune's southern border. It is surrounded by the communes of Saint-Denis-en-Bugey, and Bettant. Its expansion is due to demographic expansion with two new housing areas on the eastern side of the town where there is plenty of land (near Bettant). Ambérieu-en-Bugey is located at the foot of the western foothills of the Jura mountains of Bugey and opens onto the plain of Ain at the mouth of the gorge of Albarine. Ambérieu features an "oceanic climate" (Cfb) under the Köppen system. However, the city contains significant seasonal differences between the warm to hot summers and the cool to cold winters. Both temperatures above for the summer months and winter air frosts are common. Its record low of decisively indicates its continental influence, as well as its record high of . Weather Data for Ambérieu-en-Bugey The commune is at an altitude between 237 m and 753 m. The sub-soil has been an important economic activity in the Ambérieu region in the 19th century until the first half of the 20th century.
Hervé Lissek, Etienne Thierry Jean-Luc Rivet, Sami Driss Karkar