What is the hottest city in Bretagne?

Vitré, at 10.9 days, ahead of Châteaugiron (10.9 days).

What is the coolest city in Bretagne?

Lannion, at 0.7 days. 42 cities of Bretagne are measured here.

Where does Vitré stand in France?

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

Which cities lead in Bretagne?

Vitré (10.9 days), Châteaugiron (10.9 days), Rennes (8.9 days), Bruz (8.9 days), Cesson-Sévigné (8.9 days). The whole table is on this page.

Le Bon Rang

In Bretagne · Météo-France, fiches climatologiques

The hottest cities in Bretagne

Vitré is the hottest city in Bretagne, at 10.9 days, ahead of Châteaugiron (10.9 days) and Rennes (8.9 days). At the other end, Lannion is the coolest city, at 0.7 days.

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The 42 cities of Bretagne ranked on days above 30 °c
Rank	City	Days above 30 °C	Population
1	35 Vitré	10.9 days	19,365
2	35 Châteaugiron	10.9 days	10,845
3	35 Rennes	8.9 days	230,890
4	35 Bruz	8.9 days	19,683
5	35 Cesson-Sévigné	8.9 days	18,761
6	35 Saint-Jacques-de-la-Lande	8.9 days	13,800
7	35 Betton	8.9 days	12,964
8	35 Pacé	8.9 days	11,703
9	35 Chantepie	8.9 days	10,670
10	56 Ploërmel	6.8 days	10,163
11	56 Vannes	5.9 days	55,790
12	56 Auray	5.9 days	14,207
13	56 Saint-Avé	5.9 days	12,470
14	56 Pontivy	4.7 days	14,640
15	35 Fougères	3.8 days	20,307
16	56 Lorient	2.9 days	58,329
17	56 Lanester	2.9 days	23,263
18	56 Ploemeur	2.9 days	18,872
19	56 Hennebont	2.9 days	15,910
20	29 Quimperlé	2.9 days	12,469
21	56 Guidel	2.9 days	12,338
22	22 Lamballe-Armor	2.7 days	17,241
23	29 Concarneau	2.4 days	20,845
24	29 Fouesnant	2.4 days	10,436
25	35 Saint-Malo	2.2 days	47,439
26	22 Dinan	2.2 days	14,764
27	35 Dinard	2.2 days	10,772
28	35 Cancale	2.2 days	5,672
29	29 Morlaix	2.1 days	15,194
30	29 Quimper	1.9 days	64,385
31	29 Douarnenez	1.9 days	14,068
32	22 Saint-Brieuc	1.2 days	44,364
33	22 Plérin	1.2 days	14,425
34	22 Ploufragan	1.2 days	11,507
35	56 Quiberon	0.9 days	4,876
36	29 Brest	0.8 days	142,346
37	29 Landerneau	0.8 days	16,363
38	29 Guipavas	0.8 days	15,538
39	29 Plouzané	0.8 days	13,567
40	29 Plougastel-Daoulas	0.8 days	13,434
41	29 Le Relecq-Kerhuon	0.8 days	11,897
42	22 Lannion	0.7 days	20,315

Every city of Bretagne →

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 Bretagne

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 Bretagne?: Vitré, at 10.9 days, ahead of Châteaugiron (10.9 days).
What is the coolest city in Bretagne?: Lannion, at 0.7 days. 42 cities of Bretagne are measured here.
Where does Vitré stand in France?: 762 of the 1,040 French cities measured on days above 30 °c. The national ranking is on its own page.
Which cities lead in Bretagne?: Vitré (10.9 days), Châteaugiron (10.9 days), Rennes (8.9 days), Bruz (8.9 days), Cesson-Sévigné (8.9 days). The whole table is on this page.