Séné is wetter than 89% of mainland French towns: 1,034 mm of rain a year
On a normal January night the air cools to about 3.6°C. Winters are mild: January nights here are milder than in 87% of mainland French towns. From frosty January to warm July, readings climb 21°C. Comfortable outdoor weather lasts from May to October, with highs of 18–25°C.
Figures from Météo-France’s Saint-Avé station, 6.7 km north.
A year in Séné at a glance
Each month’s typical high and low in °C, at the Saint-Avé station.
What a year in Séné feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Avé.
About 1,034 mm of rain a year
December is the wettest month and July the driest. About 34 days a year bring 10 mm or more. 17th wettest of 88 towns of 2,500+ in Morbihan.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Vannes-Séné
25 frosts and 48 days of 25°C a year
On about 25 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 48 days a year reach 25°C, and 11 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Avé: a frost is a night of 0°C or below, a summer day (jour d’été) 25°C or more, a hot day (forte chaleur) 30°C or more.
The Météo-France station at Saint-Avé
Saint-Avé is 6.7 km north of Séné. Every figure on this page is the station’s, not a measurement in Séné itself.
| Station (Météo-France number) | Saint-Avé (56206001) |
| Distance from the town | 6.7 km north |
| Station altitude | 50 m |
| Town altitude (its center) | 11 m |
| Period | 1993–2020 (the station’s own record) |
| Nearest station of any kind | 3.2 km |
| Sunshine measured at | Vannes-Séné, 3.2 km away |
TownRatings matches each commune to one station with at least 24 years of temperature and rain records: the nearest, counting every 100 m of height difference as 10 km, never across the sea.
How Séné compares
Against the 4,385 towns of 2,500 or more in mainland France, each read from its own matched station. The dots are the other towns of 2,500+ in Morbihan.
Nearby towns’ climate
The nearest towns of 2,500+ within 29 km. Where a neighbor uses the same station its figures are the same: the differences you’d feel over a few kilometers aren’t in the normals.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Séné | Saint-Avé | 24.9°C | 3.6°C | 1,034 mm |
| Vannes 3.7 km | same station | 24.9°C about the same | 3.6°C about the same | 1,034 mm |
| Theix-Noyalo 5.7 km | same station | 24.9°C about the same | 3.6°C about the same | 1,034 mm |
| Arradon 6.7 km | same station | 24.9°C about the same | 3.6°C about the same | 1,034 mm |
| Saint-Avé 7 km | same station | 24.9°C about the same | 3.6°C about the same | 1,034 mm |
| Saint-Nolff 8.9 km | same station | 24.9°C about the same | 3.6°C about the same | 1,034 mm |
| Ploeren 9 km | same station | 24.9°C about the same | 3.6°C about the same | 1,034 mm |
Séné weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Avé station; sunshine at Vannes-Séné.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.9°C | 3.6°C | 6.8°C | 127 mm | 75 |
| February | 11.1°C | 3.7°C | 7.4°C | 91 mm | 107 |
| March | 13.8°C | 5.0°C | 9.4°C | 73 mm | 157 |
| April | 16.7°C | 6.6°C | 11.6°C | 75 mm | 201 |
| May | 19.8°C | 9.8°C | 14.8°C | 66 mm | 222 |
| June | 23.0°C | 12.5°C | 17.8°C | 57 mm | 244 |
| July | 24.9°C | 14.1°C | 19.5°C | 54 mm | 255 |
| August | 24.8°C | 14.0°C | 19.4°C | 58 mm | 225 |
| September | 22.3°C | 11.8°C | 17.1°C | 70 mm | 202 |
| October | 17.8°C | 9.7°C | 13.8°C | 109 mm | 121 |
| November | 13.2°C | 6.0°C | 9.6°C | 120 mm | 93 |
| December | 10.5°C | 4.1°C | 7.3°C | 135 mm | 79 |
| Year | 17.3°C | 8.4°C | 12.9°C | 1,034 mm | 1,981 |
Where Séné’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Avé, 6.7 km away: statistics for 1991–2020 (the station’s own years, 1993–2020, where its record is shorter).
- Which station: among stations with at least 24 of the 30 years of temperature and rain, the nearest to the commune’s population-weighted center, counting each 100 m of height difference as 10 km; mainland towns use mainland stations and each overseas département its own.
- Altitudes: the town’s from IGN’s RGE ALTI® at its population-weighted center; the station’s from Météo-France.
- Sunshine: the nearest station with at least 10 years of sunshine records, Vannes-Séné, 3.2 km away.
- Comparisons: every town of 2,500 or more in mainland France, read the same way; the dots are the towns of 2,500+ in Morbihan.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Séné’s climate
How warm does Séné get in summer?
July is the warmest month, with average highs of 24.9°C. About 48 days a year reach 25°C, fewer than 72% of mainland French towns, and about 11 reach 30°C.
How cold does Séné get in winter?
January nights average 3.6°C. The air drops to 0°C or below on about 25 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Séné get?
About 1,034 mm a year, more than 89% of mainland French towns. December is the wettest month (135 mm) and July the driest (54 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Vannes-Séné (3.2 km away), averages 1,981 hours of sunshine a year.
Are these figures for Séné itself?
No: they are the normals of the Météo-France station matched to Séné, Saint-Avé, 6.7 km away. France publishes its climate normals by station, not by commune; a valley, a hill or the sea can make a difference over a few kilometers.
Where do these figures come from?
Météo-France’s fiches climatologiques: 30-year averages (1991–2020) for each of its long-running stations, published as open data since 2024. They are normals, not a forecast.
Source: Météo-France, fiches climatologiques, 1991–2020 statistics (station ST-AVE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Séné →
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.