Nights turn raw in Le Grand-Lemps each January, colder than in 92% of mainland French towns
In July the day’s top temperature is typically 27.1°C. Rain peaks in October and eases off in February. It is a wet place: more rain falls here than on 79% of mainland French towns. Homes need heating from November to March, the months averaging under 10°C.
These are the figures of Météo-France’s Grenoble-Saint-Geoirs station, 9.1 km south-west.
A year in Le Grand-Lemps at a glance
Each month’s typical high and low in °C, at the Grenoble-Saint-Geoirs station.
What a year in Le Grand-Lemps feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Grenoble-Saint-Geoirs.
About 915 mm of rain a year
October is the wettest month and February the driest. About 29 days a year bring 10 mm or more. 67th 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: 66 frosts and 70 days of 25°C a year
On about 66 nights a year the air drops to 0°C or below, and on about 7 days it stays below freezing all day. About 70 days a year reach 25°C, and 21 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Grenoble-Saint-Geoirs: 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 Grenoble-Saint-Geoirs
Grenoble-Saint-Geoirs is 9.1 km south-west of Le Grand-Lemps. Every figure on this page is the station’s, not a measurement in Le Grand-Lemps itself.
| Station (Météo-France number) | Grenoble-Saint-Geoirs (38384001) |
| Distance from the town | 9.1 km south-west |
| Station altitude | 376 m |
| Town altitude (its center) | 477 m |
| Period | 1991–2020 |
| Sunshine measured at | the same station |
Le Grand-Lemps sits 101 m higher than the station. Air usually cools by about 0.65°C every 100 m, so expect Le Grand-Lemps to run about 0.7°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 Le Grand-Lemps 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 |
|---|---|---|---|---|
| Le Grand-Lemps | Grenoble-Saint-Geoirs | 27.1°C | −0.7°C | 915 mm |
| Apprieu 6 km | same station | 27.1°C about the same | −0.7°C about the same | 915 mm |
| Rives 8 km | same station | 27.1°C about the same | −0.7°C about the same | 915 mm |
| Renage 8.8 km | same station | 27.1°C about the same | −0.7°C about the same | 915 mm |
| Saint-Étienne-de-Saint-Geoirs 8.8 km | same station | 27.1°C about the same | −0.7°C about the same | 915 mm |
| Chirens 11 km | Novalaise | 27.3°C about the same | −2.0°C 1.3°C colder | 1,443 mm |
| Villages du Lac de Paladru 12 km | Novalaise | 27.3°C about the same | −2.0°C 1.3°C colder | 1,443 mm |
Le Grand-Lemps weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Grenoble-Saint-Geoirs station.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.3°C | −0.7°C | 2.8°C | 63 mm | 91 |
| February | 8.0°C | −0.5°C | 3.8°C | 49 mm | 112 |
| March | 12.6°C | 2.1°C | 7.4°C | 63 mm | 173 |
| April | 16.2°C | 4.7°C | 10.4°C | 76 mm | 190 |
| May | 20.2°C | 8.9°C | 14.5°C | 91 mm | 221 |
| June | 24.4°C | 12.4°C | 18.4°C | 73 mm | 258 |
| July | 27.1°C | 14.1°C | 20.6°C | 67 mm | 292 |
| August | 26.9°C | 14.2°C | 20.5°C | 66 mm | 263 |
| September | 22.0°C | 10.8°C | 16.4°C | 99 mm | 199 |
| October | 17.0°C | 7.7°C | 12.3°C | 107 mm | 140 |
| November | 10.7°C | 3.2°C | 6.9°C | 99 mm | 91 |
| December | 6.9°C | 0.1°C | 3.5°C | 64 mm | 78 |
| Year | 16.5°C | 6.4°C | 11.5°C | 915 mm | 2,108 |
Where Le Grand-Lemps’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Grenoble-Saint-Geoirs, 9.1 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, 9.1 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 Le Grand-Lemps’s climate
How warm does Le Grand-Lemps get in summer?
July is the warmest month, with average highs of 27.1°C. About 70 days a year reach 25°C, more than 64% of mainland French towns, and about 21 reach 30°C.
How cold does Le Grand-Lemps get in winter?
January nights average −0.7°C. The air drops to 0°C or below on about 66 nights a year, and about 7 days a year stay below freezing all day.
How much rain does Le Grand-Lemps get?
About 915 mm a year, more than 79% of mainland French towns. October is the wettest month (107 mm) and February the driest (49 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Grenoble-Saint-Geoirs (9.1 km away), averages 2,108 hours of sunshine a year.
Are these figures for Le Grand-Lemps itself?
No: they are the normals of the Météo-France station matched to Le Grand-Lemps, Grenoble-Saint-Geoirs, 9.1 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 GRENOBLE-ST GEOIRS, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Le Grand-Lemps →
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.