Ontex is among the wettest of mainland French towns: 1,517 mm of rain a year
The depth of winter brings overnight lows near −1.7°C. Winter nights are cold: in January they are colder than in 97% of mainland French towns. Rain peaks in October and eases off in February. Plan for rain on about 130 days a year, the days with 1 mm or more.
These are the figures of Météo-France’s Trévignin station, 13 km south-east.
A year in Ontex at a glance
Each month’s typical high and low in °C, at the Trévignin station.
What a year in Ontex 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 13 km south-east of Ontex. Every figure on this page is the station’s, not a measurement in Ontex itself.
| Station (Météo-France number) | Trévignin (73301001) |
| Distance from the town | 13 km south-east |
| Station altitude | 730 m |
| Town altitude (its center) | 702 m |
| Period | 1991–2020 |
| Nearest station of any kind | 10 km |
| Sunshine measured at | Chambery-Aix, 14 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 Ontex 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 |
|---|---|---|---|---|
| Ontex | Trévignin | 24.2°C | −1.7°C | 1,517 mm |
| Yenne 7.5 km | Chambery-Aix | 27.8°C 3.6°C warmer | −0.7°C 1°C milder | 1,204 mm |
| La Biolle 8 km | Mognard | 27.5°C 3.3°C warmer | −2.0°C about the same | 1,280 mm |
| Grésy-sur-Aix 9.3 km | Mognard | 27.5°C 3.3°C warmer | −2.0°C about the same | 1,280 mm |
| Entrelacs 9.5 km | Bloye | 27.8°C 3.6°C warmer | −1.5°C about the same | 1,207 mm |
| Aix-les-Bains 9.8 km | Chambery-Aix | 27.8°C 3.6°C warmer | −0.7°C 1°C milder | 1,204 mm |
| Belley 10 km | Chambery-Aix | 27.8°C 3.6°C warmer | −0.7°C 1°C milder | 1,204 mm |
Ontex 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 Ontex’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Trévignin, 13 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, 14 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 Ontex’s climate
How warm does Ontex 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 Ontex 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 Ontex 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 (14 km away), averages 1,895 hours of sunshine a year.
Are these figures for Ontex itself?
No: they are the normals of the Météo-France station matched to Ontex, Trévignin, 13 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 Ontex →
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.