Few mainland French towns have milder winter nights than Île-aux-Moines
High summer brings afternoon highs near 23.2°C. By warm days alone, it ranks cooler than 92% of mainland French towns. The rainiest month is December; the driest is June. An umbrella earns its place on about 118 days a year with 1 mm of rain or more.
These are the figures of Météo-France’s Sarzeau Sa station, 10 km south-east.
A year in Île-aux-Moines at a glance
Each month’s typical high and low in °C, at the Sarzeau Sa station.
What a year in Île-aux-Moines feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Sarzeau Sa.
About 741 mm of rain a year
December is the wettest month and June the driest. About 22 days a year bring 10 mm or more. 86th wettest of 88 towns of 2,500+ in Morbihan.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Vannes-Séné
16 frosts and 28 days of 25°C a year
On about 16 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 28 days a year reach 25°C, and 5 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Sarzeau Sa: 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 Sarzeau Sa
Sarzeau Sa is 10 km south-east of Île-aux-Moines. Every figure on this page is the station’s, not a measurement in Île-aux-Moines itself.
| Station (Météo-France number) | Sarzeau Sa (56240003) |
| Distance from the town | 10 km south-east |
| Station altitude | 35 m |
| Town altitude (its center) | 16 m |
| Period | 1995–2020 (the station’s own record) |
| Nearest station of any kind | 3.3 km |
| Sunshine measured at | Vannes-Séné, 10 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 Île-aux-Moines 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, each with its own matched station.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Île-aux-Moines | Sarzeau Sa | 23.2°C | 4.5°C | 741 mm |
| Arradon 4.3 km | Saint-Avé | 24.9°C 1.7°C warmer | 3.6°C 0.9°C colder | 1,034 mm |
| Baden 4.8 km | Auray | 23.6°C about the same | 4.2°C about the same | 969 mm |
| Ploeren 7.3 km | Saint-Avé | 24.9°C 1.7°C warmer | 3.6°C 0.9°C colder | 1,034 mm |
| Plougoumelen 8.4 km | Auray | 23.6°C about the same | 4.2°C about the same | 969 mm |
| Le Bono 8.9 km | Auray | 23.6°C about the same | 4.2°C about the same | 969 mm |
| Séné 9.3 km | Saint-Avé | 24.9°C 1.7°C warmer | 3.6°C 0.9°C colder | 1,034 mm |
Île-aux-Moines weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Sarzeau Sa station; sunshine at Vannes-Séné.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.5°C | 4.5°C | 7.0°C | 79 mm | 75 |
| February | 10.2°C | 4.4°C | 7.3°C | 65 mm | 107 |
| March | 12.6°C | 5.8°C | 9.2°C | 56 mm | 157 |
| April | 15.3°C | 7.3°C | 11.3°C | 55 mm | 201 |
| May | 18.3°C | 10.2°C | 14.3°C | 47 mm | 222 |
| June | 21.4°C | 12.9°C | 17.1°C | 41 mm | 244 |
| July | 23.2°C | 14.5°C | 18.9°C | 42 mm | 255 |
| August | 23.1°C | 14.5°C | 18.8°C | 47 mm | 225 |
| September | 21.3°C | 12.6°C | 17.0°C | 47 mm | 202 |
| October | 17.2°C | 10.8°C | 14.0°C | 81 mm | 121 |
| November | 13.1°C | 7.4°C | 10.2°C | 89 mm | 93 |
| December | 10.2°C | 5.1°C | 7.6°C | 93 mm | 79 |
| Year | 16.3°C | 9.2°C | 12.7°C | 741 mm | 1,981 |
Where Île-aux-Moines’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Sarzeau Sa, 10 km away: statistics for 1991–2020 (the station’s own years, 1995–2020, 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, 10 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 Île-aux-Moines’s climate
How warm does Île-aux-Moines get in summer?
July is the warmest month, with average highs of 23.2°C. About 28 days a year reach 25°C, fewer than 92% of mainland French towns, and about 5 reach 30°C.
How cold does Île-aux-Moines get in winter?
February nights average 4.4°C. The air drops to 0°C or below on about 16 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Île-aux-Moines get?
About 741 mm a year, less than 54% of mainland French towns. December is the wettest month (93 mm) and June the driest (41 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Vannes-Séné (10 km away), averages 1,981 hours of sunshine a year.
Are these figures for Île-aux-Moines itself?
No: they are the normals of the Météo-France station matched to Île-aux-Moines, Sarzeau Sa, 10 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 SARZEAU SA, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Île-aux-Moines →
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.