Hardly any mainland French towns collect more rain than Rochetoirin: 1,443 mm a year
High summer brings afternoon highs near 27.3°C. Winter nights are cold: in January they are colder than in 98% of mainland French towns. A year here swings 29°C from midwinter lows to midsummer highs. Homes need heating from November to March, the months averaging under 10°C.
These are the figures of Météo-France’s Novalaise station, 28 km east; at that distance they describe the area more than the town.
A year in Rochetoirin at a glance
Each month’s typical high and low in °C, at the Novalaise station.
What a year in Rochetoirin feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Novalaise.
About 1,443 mm of rain a year
November is the wettest month and February the driest. About 52 days a year bring 10 mm or more. 2nd 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: 89 frosts and 76 days of 25°C a year
On about 89 nights a year the air drops to 0°C or below, and on about 9 days it stays below freezing all day. About 76 days a year reach 25°C, and 25 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Novalaise: 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 Novalaise
Novalaise is 28 km east of Rochetoirin. Every figure on this page is the station’s, not a measurement in Rochetoirin itself.
| Station (Météo-France number) | Novalaise (73191001) |
| Distance from the town | 28 km east |
| Station altitude | 460 m |
| Town altitude (its center) | 444 m |
| Period | 1991–2020 |
| Nearest station of any kind | 8.5 km |
| Sunshine measured at | Grenoble-Saint-Geoirs, 26 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 Rochetoirin 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 |
|---|---|---|---|---|
| Rochetoirin | Novalaise | 27.3°C | −2.0°C | 1,443 mm |
| La Tour-du-Pin 3 km | Pont-de-Beauvoisin | 28.5°C 1.2°C warmer | −1.2°C 0.8°C milder | 1,166 mm |
| Cessieu 3.5 km | Pont-de-Beauvoisin | 28.5°C 1.2°C warmer | −1.2°C 0.8°C milder | 1,166 mm |
| Saint-Clair-de-la-Tour 5.4 km | Pont-de-Beauvoisin | 28.5°C 1.2°C warmer | −1.2°C 0.8°C milder | 1,166 mm |
| Ruy-Montceau 6.4 km | Grenoble-Saint-Geoirs | 27.1°C about the same | −0.7°C 1.3°C milder | 915 mm |
| Dolomieu 6.5 km | Pont-de-Beauvoisin | 28.5°C 1.2°C warmer | −1.2°C 0.8°C milder | 1,166 mm |
| Saint-Chef 7.2 km | Lyon-Saint-Exupery | 27.5°C about the same | 1.1°C 3.1°C milder | 863 mm |
Rochetoirin weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Novalaise station; sunshine at Grenoble-Saint-Geoirs.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 5.8°C | −2.0°C | 1.9°C | 111 mm | 91 |
| February | 7.8°C | −1.8°C | 3.0°C | 95 mm | 112 |
| March | 12.7°C | 1.1°C | 6.9°C | 111 mm | 173 |
| April | 16.7°C | 3.9°C | 10.3°C | 115 mm | 190 |
| May | 20.8°C | 8.0°C | 14.4°C | 137 mm | 221 |
| June | 24.9°C | 11.5°C | 18.2°C | 121 mm | 258 |
| July | 27.3°C | 13.2°C | 20.2°C | 117 mm | 292 |
| August | 26.9°C | 13.0°C | 19.9°C | 108 mm | 263 |
| September | 21.7°C | 9.6°C | 15.7°C | 126 mm | 199 |
| October | 16.5°C | 6.5°C | 11.5°C | 134 mm | 140 |
| November | 10.1°C | 1.9°C | 6.0°C | 139 mm | 91 |
| December | 6.1°C | −1.2°C | 2.5°C | 130 mm | 78 |
| Year | 16.4°C | 5.3°C | 10.9°C | 1,443 mm | 2,108 |
Where Rochetoirin’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Novalaise, 28 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, 26 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 Rochetoirin’s climate
How warm does Rochetoirin get in summer?
July is the warmest month, with average highs of 27.3°C. About 76 days a year reach 25°C, more than 68% of mainland French towns, and about 25 reach 30°C.
How cold does Rochetoirin get in winter?
January nights average −2.0°C. The air drops to 0°C or below on about 89 nights a year, and about 9 days a year stay below freezing all day.
How much rain does Rochetoirin get?
About 1,443 mm a year, more than 98% of mainland French towns. November is the wettest month (139 mm) and February the driest (95 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Grenoble-Saint-Geoirs (26 km away), averages 2,108 hours of sunshine a year.
Are these figures for Rochetoirin itself?
No: they are the normals of the Météo-France station matched to Rochetoirin, Novalaise, 28 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 NOVALAISE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Rochetoirin →
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.