Montagnieu, Ain

Montagnieu (French pronunciation: [mɔ̃taɲø]) is a commune in the Ain department in eastern France. It is sited on the eastern bank of the river Rhone, which forms the border with the Isere department to the west.

Montagnieu
Commune
Chateau
Location of Montagnieu
Montagnieu Show map of France Montagnieu Show map of Auvergne-Rhône-Alpes
Coordinates: 45°47′41″N 5°28′05″E
Country	France
Region	Auvergne-Rhône-Alpes
Department	Ain
Arrondissement	Belley
Canton	Lagnieu
Government
• Mayor (2020–2026)	Jean Roset[1]
Area 1	6.22 km2 (2.40 sq mi)
Population  (2022)[2]	684
• Density	110/km2 (280/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	01255 /01470
Elevation	200–714 m (656–2,343 ft) (avg. 225 m or 738 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

The 18th century parish church is dedicated to Saint Didier.

Geography

Climate

Montagnieu has an oceanic climate (Köppen climate classification Cfb). The average annual temperature in Montagnieu is 12.4 °C (54.3 °F). The average annual rainfall is 1,099.9 mm (43.30 in) with November as the wettest month. The temperatures are highest on average in August, at around 21.5 °C (70.7 °F), and lowest in January, at around 3.2 °C (37.8 °F). The highest temperature ever recorded in Montagnieu was 40.0 °C (104.0 °F) on 13 August 2003; the coldest temperature ever recorded was −14.7 °C (5.5 °F) on 7 February 2012.

Climate data for Montagnieu (1991–2020 averages, extremes 1994−2012)
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Record high °C (°F)	17.5 (63.5)	20.0 (68.0)	25.0 (77.0)	28.0 (82.4)	33.6 (92.5)	38.0 (100.4)	38.0 (100.4)	40.0 (104.0)	34.0 (93.2)	27.5 (81.5)	24.0 (75.2)	17.5 (63.5)	40.0 (104.0)
Mean daily maximum °C (°F)	6.0 (42.8)	8.2 (46.8)	13.1 (55.6)	16.6 (61.9)	21.4 (70.5)	25.1 (77.2)	27.2 (81.0)	27.2 (81.0)	22.2 (72.0)	17.7 (63.9)	10.7 (51.3)	6.5 (43.7)	16.8 (62.2)
Daily mean °C (°F)	3.2 (37.8)	4.5 (40.1)	8.5 (47.3)	11.6 (52.9)	16.2 (61.2)	19.5 (67.1)	21.4 (70.5)	21.5 (70.7)	17.1 (62.8)	13.5 (56.3)	7.5 (45.5)	3.8 (38.8)	12.4 (54.3)
Mean daily minimum °C (°F)	0.3 (32.5)	0.8 (33.4)	3.9 (39.0)	6.6 (43.9)	10.9 (51.6)	13.9 (57.0)	15.7 (60.3)	15.8 (60.4)	12.1 (53.8)	9.3 (48.7)	4.4 (39.9)	1.2 (34.2)	7.9 (46.2)
Record low °C (°F)	−11.0 (12.2)	−14.7 (5.5)	−11.0 (12.2)	−2.5 (27.5)	1.0 (33.8)	3.0 (37.4)	8.0 (46.4)	5.5 (41.9)	2.0 (35.6)	−3.5 (25.7)	−7.0 (19.4)	−12.3 (9.9)	−14.7 (5.5)
Average precipitation mm (inches)	92.8 (3.65)	72.9 (2.87)	75.4 (2.97)	83.3 (3.28)	98.1 (3.86)	82.5 (3.25)	75.0 (2.95)	78.1 (3.07)	99.0 (3.90)	111.0 (4.37)	122.3 (4.81)	109.5 (4.31)	1,099.9 (43.30)
Average precipitation days (≥ 1.0 mm)	10.0	9.1	9.0	8.6	10.0	8.4	7.1	7.3	7.5	10.1	10.8	11.1	108.9
Source: Meteociel[3]

Population

Historical population

Year	Pop.	±% p.a.
1968	306	—
1975	354	+2.10%
1982	372	+0.71%
1990	356	−0.55%
1999	386	+0.90%
2009	495	+2.52%
2014	584	+3.36%
2020	651	+1.83%
Source: INSEE[4]

See also

• Communes of the Ain department