Midwinter lows in L'Île-d'Yeu stay above those of 92% of mainland French towns
The warmest part of a July day comes in at 24.9°C on average. Its July afternoons stay fresher than in 73% of mainland French towns. The gap between a January night and a July afternoon is 21°C. Garden chairs stay out from May to October, the months with highs of 18–25°C.
These are the figures of Météo-France’s Saint-Jean de Mont station, 25 km east; at that distance they describe the area more than the town.
A year in L'Île-d'Yeu at a glance
Each month’s typical high and low in °C, at the Saint-Jean de Mont station.
What a year in L'Île-d'Yeu feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Jean de Mont.
About 783 mm of rain a year
November is the wettest month and July the driest. About 25 days a year bring 10 mm or more. 52nd wettest of 75 towns of 2,500+ in Vendée.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Château-D’Olonne
30 frosts and 47 days of 25°C a year
On about 30 nights a year the air drops to 0°C or below, and on about under 1 days it stays below freezing all day. About 47 days a year reach 25°C, and 11 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Jean de Mont: 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-Jean de Mont
Saint-Jean de Mont is 25 km east of L'Île-d'Yeu. Every figure on this page is the station’s, not a measurement in L'Île-d'Yeu itself.
| Station (Météo-France number) | Saint-Jean de Mont (85234001) |
| Distance from the town | 25 km east |
| Station altitude | 3 m |
| Town altitude (its center) | 20 m |
| Period | 1991–2020 |
| Sunshine measured at | Château-D’Olonne, 55 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 L'Île-d'Yeu 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 Vendée.
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 |
|---|---|---|---|---|
| L'Île-d'Yeu | Saint-Jean de Mont | 24.9°C | 4.1°C | 783 mm |
| Saint-Jean-de-Monts 25 km | same station | 24.9°C about the same | 4.1°C about the same | 783 mm |
L'Île-d'Yeu weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Jean de Mont station; sunshine at Château-D’Olonne.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 10.0°C | 4.1°C | 7.1°C | 85 mm | 92 |
| February | 10.9°C | 3.5°C | 7.2°C | 63 mm | 132 |
| March | 13.8°C | 5.3°C | 9.6°C | 55 mm | 178 |
| April | 16.5°C | 7.0°C | 11.7°C | 58 mm | 234 |
| May | 19.8°C | 10.4°C | 15.1°C | 53 mm | 260 |
| June | 23.1°C | 13.2°C | 18.1°C | 39 mm | 276 |
| July | 24.9°C | 14.9°C | 19.9°C | 37 mm | 291 |
| August | 24.9°C | 14.7°C | 19.8°C | 45 mm | 268 |
| September | 22.5°C | 11.9°C | 17.2°C | 63 mm | 227 |
| October | 18.1°C | 10.1°C | 14.1°C | 94 mm | 154 |
| November | 13.7°C | 6.7°C | 10.2°C | 98 mm | 111 |
| December | 10.8°C | 4.5°C | 7.6°C | 95 mm | 99 |
| Year | 17.4°C | 8.9°C | 13.1°C | 783 mm | 2,324 |
Where L'Île-d'Yeu’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Jean de Mont, 25 km away: statistics for 1991–2020.
- 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, Château-D’Olonne, 55 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 Vendée.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about L'Île-d'Yeu’s climate
How warm does L'Île-d'Yeu get in summer?
July is the warmest month, with average highs of 24.9°C. About 47 days a year reach 25°C, fewer than 73% of mainland French towns, and about 11 reach 30°C.
How cold does L'Île-d'Yeu get in winter?
February nights average 3.5°C. The air drops to 0°C or below on about 30 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does L'Île-d'Yeu get?
About 783 mm a year, more than 57% of mainland French towns. November is the wettest month (98 mm) and July the driest (37 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Château-D’Olonne (55 km away), averages 2,324 hours of sunshine a year.
Are these figures for L'Île-d'Yeu itself?
No: they are the normals of the Météo-France station matched to L'Île-d'Yeu, Saint-Jean de Mont, 25 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 JEAN DE MONT, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for L'Île-d'Yeu →
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.