Few mainland French towns get more rain than Aillon-le-Jeune: 1,517 mm a year
July afternoons average 24.2°C. Rain is spread evenly through the year: the wettest month, October, gets little more than the driest, February. Its January nights bite harder than in 97% of mainland French towns. Keep the boiler serviced for the months from November to April, which average under 10°C.
Figures from Météo-France’s Trévignin station, 14 km north-west.
A year in Aillon-le-Jeune at a glance
Each month’s typical high and low in °C, at the Trévignin station.
What a year in Aillon-le-Jeune feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Trévignin.
About 1,517 mm of rain a year
October is the wettest month and February the driest. About 54 days a year bring 10 mm or more. The wettest of 37 towns of 2,500+ in Savoie.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Chambery-Aix
A frosty town: 80 frosts and 40 days of 25°C a year
On about 80 nights a year the air drops to 0°C or below, and on about 18 days it stays below freezing all day. About 40 days a year reach 25°C, and 6 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Trévignin: 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 Trévignin
Trévignin is 14 km north-west of Aillon-le-Jeune. Every figure on this page is the station’s, not a measurement in Aillon-le-Jeune itself.
| Station (Météo-France number) | Trévignin (73301001) |
| Distance from the town | 14 km north-west |
| Station altitude | 730 m |
| Town altitude (its center) | 947 m |
| Period | 1991–2020 |
| Nearest station of any kind | 9.7 km |
| Sunshine measured at | Chambery-Aix, 17 km away |
Aillon-le-Jeune sits 217 m higher than the station. Air usually cools by about 0.65°C every 100 m, so expect Aillon-le-Jeune to run about 1.4°C cooler than these figures.
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 Aillon-le-Jeune 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 Savoie.
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 |
|---|---|---|---|---|
| Aillon-le-Jeune | Trévignin | 24.2°C | −1.7°C | 1,517 mm |
| Saint-Pierre-d'Albigny 6.8 km | Saint-Pierre-de-Soucy | 27.7°C 3.5°C warmer | −1.8°C about the same | 1,122 mm |
| Barby 10 km | Challes-les-Eaux | 28.1°C 3.9°C warmer | −1.8°C about the same | 1,148 mm |
| Challes-les-Eaux 11 km | Challes-les-Eaux | 28.1°C 3.9°C warmer | −1.8°C about the same | 1,148 mm |
| Saint-Alban-Leysse 11 km | Challes-les-Eaux | 28.1°C 3.9°C warmer | −1.8°C about the same | 1,148 mm |
| La Ravoire 12 km | Challes-les-Eaux | 28.1°C 3.9°C warmer | −1.8°C about the same | 1,148 mm |
| Montmélian 13 km | Saint-Pierre-de-Soucy | 27.7°C 3.5°C warmer | −1.8°C about the same | 1,122 mm |
Aillon-le-Jeune weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Trévignin station; sunshine at Chambery-Aix.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 3.8°C | −1.7°C | 1.0°C | 115 mm | 77 |
| February | 5.4°C | −1.5°C | 2.0°C | 100 mm | 102 |
| March | 10.0°C | 1.5°C | 5.7°C | 114 mm | 158 |
| April | 13.7°C | 4.3°C | 9.0°C | 123 mm | 176 |
| May | 17.8°C | 8.2°C | 13.0°C | 139 mm | 202 |
| June | 21.9°C | 11.9°C | 16.9°C | 126 mm | 236 |
| July | 24.2°C | 13.9°C | 19.0°C | 127 mm | 262 |
| August | 23.7°C | 13.7°C | 18.7°C | 128 mm | 237 |
| September | 18.8°C | 10.2°C | 14.5°C | 133 mm | 181 |
| October | 13.9°C | 6.8°C | 10.3°C | 139 mm | 124 |
| November | 8.1°C | 2.1°C | 5.1°C | 137 mm | 75 |
| December | 4.6°C | −0.9°C | 1.8°C | 138 mm | 66 |
| Year | 13.8°C | 5.7°C | 9.8°C | 1,517 mm | 1,895 |
Where Aillon-le-Jeune’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Trévignin, 14 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, Chambery-Aix, 17 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 Savoie.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Aillon-le-Jeune’s climate
How warm does Aillon-le-Jeune get in summer?
July is the warmest month, with average highs of 24.2°C. About 40 days a year reach 25°C, fewer than 80% of mainland French towns, and about 6 reach 30°C.
How cold does Aillon-le-Jeune get in winter?
January nights average −1.7°C. The air drops to 0°C or below on about 80 nights a year, and about 18 days a year stay below freezing all day.
How much rain does Aillon-le-Jeune get?
About 1,517 mm a year, more than almost every mainland French town. October is the wettest month (139 mm) and February the driest (100 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Chambery-Aix (17 km away), averages 1,895 hours of sunshine a year.
Are these figures for Aillon-le-Jeune itself?
No: they are the normals of the Météo-France station matched to Aillon-le-Jeune, Trévignin, 14 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 TREVIGNIN, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Aillon-le-Jeune →
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.