Nights turn raw in Rovon each January, colder than in 90% of mainland French towns
High summer brings afternoon highs near 28.3°C. By rainfall alone, it ranks wetter than 86% of mainland French towns. Temperatures cover 29°C across the year, low to high. Plan for rain on about 108 days a year, the days with 1 mm or more.
These are the figures of Météo-France’s Chatte station, 14 km south-west.
A year in Rovon at a glance
Each month’s typical high and low in °C, at the Chatte station.
What a year in Rovon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Chatte.
About 968 mm of rain a year
October is the wettest month and February the driest. About 31 days a year bring 10 mm or more. 45th wettest of 110 towns of 2,500+ in Isère.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Grenoble-Saint-Geoirs
A frosty town: 67 frosts and 85 days of 25°C a year
On about 67 nights a year the air drops to 0°C or below, and on about 5 days it stays below freezing all day. About 85 days a year reach 25°C, and 31 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Chatte: 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 Chatte
Chatte is 14 km south-west of Rovon. Every figure on this page is the station’s, not a measurement in Rovon itself.
| Station (Météo-France number) | Chatte (38095001) |
| Distance from the town | 14 km south-west |
| Station altitude | 272 m |
| Town altitude (its center) | 234 m |
| Period | 1991–2020 |
| Sunshine measured at | Grenoble-Saint-Geoirs, 22 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 Rovon 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. 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 |
|---|---|---|---|---|
| Rovon | Chatte | 28.3°C | −0.5°C | 968 mm |
| Vinay 4.1 km | same station | 28.3°C about the same | −0.5°C about the same | 968 mm |
| Autrans-Méaudre en Vercors 7.4 km | Villard-de-Lans | 23.7°C 4.6°C cooler | −4.8°C 4.3°C colder | 1,270 mm |
| Tullins 11 km | same station | 28.3°C about the same | −0.5°C about the same | 968 mm |
| Saint-Marcellin 12 km | same station | 28.3°C about the same | −0.5°C about the same | 968 mm |
| Lans-en-Vercors 13 km | Villard-de-Lans | 23.7°C 4.6°C cooler | −4.8°C 4.3°C colder | 1,270 mm |
| Chatte 15 km | same station | 28.3°C about the same | −0.5°C about the same | 968 mm |
Rovon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Chatte station; sunshine at Grenoble-Saint-Geoirs.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.2°C | −0.5°C | 3.4°C | 66 mm | 91 |
| February | 9.0°C | −0.2°C | 4.4°C | 54 mm | 112 |
| March | 13.8°C | 2.4°C | 8.1°C | 64 mm | 173 |
| April | 17.3°C | 5.2°C | 11.2°C | 84 mm | 190 |
| May | 21.2°C | 9.1°C | 15.2°C | 96 mm | 221 |
| June | 25.5°C | 12.5°C | 19.0°C | 81 mm | 258 |
| July | 28.3°C | 14.3°C | 21.3°C | 68 mm | 292 |
| August | 27.9°C | 14.1°C | 21.0°C | 82 mm | 263 |
| September | 22.9°C | 10.8°C | 16.9°C | 101 mm | 199 |
| October | 17.9°C | 7.6°C | 12.8°C | 108 mm | 140 |
| November | 11.5°C | 3.1°C | 7.3°C | 99 mm | 91 |
| December | 7.5°C | 0.1°C | 3.8°C | 66 mm | 78 |
| Year | 17.5°C | 6.5°C | 12.0°C | 968 mm | 2,108 |
Where Rovon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Chatte, 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, Grenoble-Saint-Geoirs, 22 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 Rovon’s climate
How warm does Rovon get in summer?
July is the warmest month, with average highs of 28.3°C. About 85 days a year reach 25°C, more than 76% of mainland French towns, and about 31 reach 30°C.
How cold does Rovon get in winter?
January nights average −0.5°C. The air drops to 0°C or below on about 67 nights a year, and about 5 days a year stay below freezing all day.
How much rain does Rovon get?
About 968 mm a year, more than 86% of mainland French towns. October is the wettest month (108 mm) and February the driest (54 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Grenoble-Saint-Geoirs (22 km away), averages 2,108 hours of sunshine a year.
Are these figures for Rovon itself?
No: they are the normals of the Météo-France station matched to Rovon, Chatte, 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 CHATTE_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Rovon →
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.