What is the hottest city in Seine-Maritime?

Rouen, at 5.9 days, ahead of Saint-Étienne-du-Rouvray (5.9 days).

What is the coolest city in Seine-Maritime?

Dieppe, at 2.1 days. 22 cities of Seine-Maritime are measured here.

Where does Rouen stand in France?

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

Which cities lead in Seine-Maritime?

Rouen (5.9 days), Saint-Étienne-du-Rouvray (5.9 days), Sotteville-lès-Rouen (5.9 days), Le Grand-Quevilly (5.9 days), Le Petit-Quevilly (5.9 days). The whole table is on this page.

Le Bon Rang

In Seine-Maritime · Météo-France, fiches climatologiques

The hottest cities in Seine-Maritime

Rouen is the hottest city in Seine-Maritime, at 5.9 days, ahead of Saint-Étienne-du-Rouvray (5.9 days) and Sotteville-lès-Rouen (5.9 days). At the other end, Dieppe is the coolest city, at 2.1 days.

Could you put Dieppe, Le Havre and Saint-Étienne-du-Rouvray in this ranking's order? Le Bon Rang is that game, every day. Play today's game

The 22 cities of Seine-Maritime ranked on days above 30 °c
Rank	City	Days above 30 °C	Population
1	Rouen	5.9 days	117,662
2	Saint-Étienne-du-Rouvray	5.9 days	29,518
3	Sotteville-lès-Rouen	5.9 days	29,003
4	Le Grand-Quevilly	5.9 days	25,789
5	Le Petit-Quevilly	5.9 days	22,208
6	Mont-Saint-Aignan	5.9 days	20,165
7	Elbeuf	5.9 days	15,474
8	Bois-Guillaume	5.9 days	14,539
9	Canteleu	5.9 days	14,402
10	Oissel-sur-Seine	5.9 days	12,317
11	Maromme	5.9 days	10,957
12	Déville-lès-Rouen	5.9 days	10,802
13	Caudebec-lès-Elbeuf	5.9 days	10,476
14	Bolbec	5.5 days	11,590
15	Port-Jérôme-sur-Seine	5.5 days	10,617
16	Fécamp	4.2 days	17,313
17	Barentin	4.2 days	12,022
18	Yvetot	4.2 days	11,438
19	Le Havre	3.1 days	166,687
20	Montivilliers	3.1 days	15,478
21	Étretat	3.1 days	1,102
22	Dieppe	2.1 days	28,496

Every city of Seine-Maritime →

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 Seine-Maritime

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 Seine-Maritime?: Rouen, at 5.9 days, ahead of Saint-Étienne-du-Rouvray (5.9 days).
What is the coolest city in Seine-Maritime?: Dieppe, at 2.1 days. 22 cities of Seine-Maritime are measured here.
Where does Rouen stand in France?: 939 of the 1,040 French cities measured on days above 30 °c. The national ranking is on its own page.
Which cities lead in Seine-Maritime?: Rouen (5.9 days), Saint-Étienne-du-Rouvray (5.9 days), Sotteville-lès-Rouen (5.9 days), Le Grand-Quevilly (5.9 days), Le Petit-Quevilly (5.9 days). The whole table is on this page.