Hardly any mainland French towns wake to more frost than Ornon
July afternoons average 25.0°C. Only 31°C separates winter nights from summer afternoons. Rain is plentiful here, more than falls on 97% of mainland French towns. Plan for rain on about 103 days a year, the days with 1 mm or more.
These are the figures of Météo-France’s Villar-Loubière station, 27 km south-east; at that distance they describe the area more than the town.
A year in Ornon at a glance
Each month’s typical high and low in °C, at the Villar-Loubière station.
What a year in Ornon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Villar-Loubière.
About 1,240 mm of rain a year
November is the wettest month and July the driest. About 41 days a year bring 10 mm or more. 8th wettest of 110 towns of 2,500+ in Isère.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Villar-Saint-Pancrace
A frosty town: 140 frosts and 54 days of 25°C a year
On about 140 nights a year the air drops to 0°C or below, and on about 32 days it stays below freezing all day. About 54 days a year reach 25°C, and 12 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Villar-Loubière: 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 Villar-Loubière
Villar-Loubière is 27 km south-east of Ornon. Every figure on this page is the station’s, not a measurement in Ornon itself.
| Station (Météo-France number) | Villar-Loubière (05182001) |
| Distance from the town | 27 km south-east |
| Station altitude | 1,072 m |
| Town altitude (its center) | 1,139 m |
| Period | 1991–2020 |
| Nearest station of any kind | 9.6 km |
| Sunshine measured at | Villar-Saint-Pancrace, 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 Ornon 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 Isère.
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 |
|---|---|---|---|---|
| Ornon | Villar-Loubière | 25.0°C | −5.5°C | 1,240 mm |
| Le Bourg-d'Oisans 4.6 km | Saint-Michel Maur | 27.4°C 2.4°C warmer | −2.8°C 2.7°C milder | 754 mm |
| Vaulnaveys-le-Haut 15 km | Saint-Pierre-de-Soucy | 27.7°C 2.7°C warmer | −1.8°C 3.7°C milder | 1,122 mm |
| Saint-Martin-d'Uriage 16 km | Monestier | 25.0°C about the same | −2.1°C 3.4°C milder | 1,063 mm |
| Vizille 17 km | Chatte | 28.3°C 3.3°C warmer | −0.5°C 5°C milder | 968 mm |
| Jarrie 19 km | Saint-Jean-en-Roya | 28.5°C 3.5°C warmer | −0.1°C 5.4°C milder | 1,136 mm |
| Champ-sur-Drac 20 km | Chatte | 28.3°C 3.3°C warmer | −0.5°C 5°C milder | 968 mm |
Ornon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Villar-Loubière station; sunshine at Villar-Saint-Pancrace.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 1.2°C | −5.5°C | −2.2°C | 111 mm | 126 |
| February | 4.8°C | −5.5°C | −0.3°C | 76 mm | 131 |
| March | 10.3°C | −1.7°C | 4.3°C | 88 mm | 165 |
| April | 14.0°C | 1.4°C | 7.7°C | 95 mm | 193 |
| May | 18.1°C | 5.4°C | 11.7°C | 103 mm | 217 |
| June | 22.3°C | 8.7°C | 15.5°C | 89 mm | 245 |
| July | 25.0°C | 10.7°C | 17.8°C | 69 mm | 270 |
| August | 24.7°C | 10.8°C | 17.8°C | 80 mm | 250 |
| September | 19.7°C | 7.7°C | 13.7°C | 102 mm | 179 |
| October | 14.4°C | 4.4°C | 9.4°C | 146 mm | 139 |
| November | 6.1°C | −0.6°C | 2.8°C | 151 mm | 112 |
| December | 1.6°C | −4.2°C | −1.3°C | 132 mm | 109 |
| Year | 13.5°C | 2.6°C | 8.1°C | 1,240 mm | 2,135 |
Where Ornon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Villar-Loubière, 27 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, Villar-Saint-Pancrace, 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 Isère.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Ornon’s climate
How warm does Ornon get in summer?
July is the warmest month, with average highs of 25.0°C. About 54 days a year reach 25°C, fewer than 64% of mainland French towns, and about 12 reach 30°C.
How cold does Ornon get in winter?
January nights average −5.5°C. The air drops to 0°C or below on about 140 nights a year, and about 32 days a year stay below freezing all day.
How much rain does Ornon get?
About 1,240 mm a year, more than 97% of mainland French towns. November is the wettest month (151 mm) and July the driest (69 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Villar-Saint-Pancrace (55 km away), averages 2,135 hours of sunshine a year.
Are these figures for Ornon itself?
No: they are the normals of the Météo-France station matched to Ornon, Villar-Loubière, 27 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 VILLAR LOUBIERE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Ornon →
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.