What is the hottest city in Loire-Atlantique?

Carquefou, at 13.8 days, ahead of La Chapelle-sur-Erdre (13.8 days).

What is the coolest city in Loire-Atlantique?

Pornic, at 6.0 days. 23 cities of Loire-Atlantique are measured here.

Where does Carquefou stand in France?

562 of the 1,040 French cities measured on days above 30 °c. The national ranking is on its own page.

Which cities lead in Loire-Atlantique?

Carquefou (13.8 days), La Chapelle-sur-Erdre (13.8 days), Ancenis-Saint-Géréon (13.8 days), Thouaré-sur-Loire (13.8 days), Treillières (13.8 days). The whole table is on this page.

Le Bon Rang

In Loire-Atlantique · Météo-France, fiches climatologiques

The hottest cities in Loire-Atlantique

Carquefou is the hottest city in Loire-Atlantique, at 13.8 days, ahead of La Chapelle-sur-Erdre (13.8 days) and Ancenis-Saint-Géréon (13.8 days). At the other end, Pornic is the coolest city, at 6.0 days.

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The 23 cities of Loire-Atlantique ranked on days above 30 °c
Rank	City	Days above 30 °C	Population
1	Carquefou	13.8 days	20,921
2	La Chapelle-sur-Erdre	13.8 days	20,690
3	Ancenis-Saint-Géréon	13.8 days	11,600
4	Thouaré-sur-Loire	13.8 days	11,004
5	Treillières	13.8 days	10,600
6	Blain	13.8 days	10,376
7	Nantes	11.8 days	327,734
8	Saint-Herblain	11.8 days	50,973
9	Rezé	11.8 days	43,556
10	Saint-Sébastien-sur-Loire	11.8 days	28,596
11	Orvault	11.8 days	28,534
12	Vertou	11.8 days	26,227
13	Couëron	11.8 days	24,103
14	Bouguenais	11.8 days	20,530
15	Sainte-Luce-sur-Loire	11.8 days	16,400
16	Châteaubriant	10.9 days	12,260
17	Saint-Nazaire	8.8 days	74,568
18	La Baule-Escoublac	8.8 days	16,912
19	Guérande	8.8 days	16,804
20	Saint-Brevin-les-Pins	8.8 days	14,541
21	Pornichet	8.8 days	12,800
22	Pontchâteau	8.8 days	11,474
23	Pornic	6.0 days	18,745

Every city of Loire-Atlantique →

The same ranking for the whole of France : The hottest cities in France · The coolest cities in France in summer

The hottest cities in, elsewhere

The other rankings of Loire-Atlantique

Scope, method and sources

Scope: France, metropolitan and overseas, Corsica and the DROM included. This dataset holds every commune of 10,000 inhabitants or more, plus smaller communes famous enough to be household names, 1,131 in all. It is not the full list of 35,000 French communes, so a village can sit outside a ranking whose extreme it would otherwise hold. This particular ranking is metropolitan only: the distance to the coast is measured against the coastlines of the Hexagon and Corsica, which would put an overseas port thousands of kilometres from a sea it sits on, so no value is published for overseas France rather than a wrong one.

Method and sources: populations are the INSEE legal populations, boundaries and coordinates come from the IGN commune registry, both served by geo.api.gouv.fr. Density is the population divided by the commune's area; distances are measured as the crow flies from the commune's centre. Data read on August 28, 2026.

4 questions about this ranking

What is the hottest city in Loire-Atlantique?: Carquefou, at 13.8 days, ahead of La Chapelle-sur-Erdre (13.8 days).
What is the coolest city in Loire-Atlantique?: Pornic, at 6.0 days. 23 cities of Loire-Atlantique are measured here.
Where does Carquefou stand in France?: 562 of the 1,040 French cities measured on days above 30 °c. The national ranking is on its own page.
Which cities lead in Loire-Atlantique?: Carquefou (13.8 days), La Chapelle-sur-Erdre (13.8 days), Ancenis-Saint-Géréon (13.8 days), Thouaré-sur-Loire (13.8 days), Treillières (13.8 days). The whole table is on this page.