Rainfall in Le Grand-Serre tops that of 87% of mainland French towns: 1,004 mm a year
Expect July afternoons of about 26.9°C. Its January nights bite harder than in 80% of mainland French towns. The rainiest month is October; the driest is February. Gritters and ice scrapers earn their keep on roughly 51 nights a year below 0°C.
Figures from Météo-France’s Saint-Christophe-L station, 5 km south-west.
A year in Le Grand-Serre at a glance
Each month’s typical high and low in °C, at the Saint-Christophe-L station.
What a year in Le Grand-Serre feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Christophe-L.
About 1,004 mm of rain a year
October is the wettest month and February the driest. About 30 days a year bring 10 mm or more. 2nd wettest of 40 towns of 2,500+ in Drôme.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Grenoble-Saint-Geoirs
A frosty town: 51 frosts and 69 days of 25°C a year
On about 51 nights a year the air drops to 0°C or below, and on about 9 days it stays below freezing all day. About 69 days a year reach 25°C, and 20 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Christophe-L: 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 Saint-Christophe-L
Saint-Christophe-L is 5 km south-west of Le Grand-Serre. Every figure on this page is the station’s, not a measurement in Le Grand-Serre itself.
| Station (Météo-France number) | Saint-Christophe-L (26298001) |
| Distance from the town | 5 km south-west |
| Station altitude | 452 m |
| Town altitude (its center) | 401 m |
| Period | 1991–2020 |
| Sunshine measured at | Grenoble-Saint-Geoirs, 20 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 Le Grand-Serre 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 Drôme.
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 |
|---|---|---|---|---|
| Le Grand-Serre | Saint-Christophe-L | 26.9°C | 0.5°C | 1,004 mm |
| Beaurepaire 9 km | Saint-Sorlin-en-Va | 28.6°C 1.7°C warmer | 1.2°C 0.7°C milder | 855 mm |
| Saint-Siméon-de-Bressieux 14 km | Grenoble-Saint-Geoirs | 27.1°C about the same | −0.7°C 1.2°C colder | 915 mm |
| Anneyron 17 km | Saint-Sorlin-en-Va | 28.6°C 1.7°C warmer | 1.2°C 0.7°C milder | 855 mm |
| La Côte-Saint-André 18 km | Grenoble-Saint-Geoirs | 27.1°C about the same | −0.7°C 1.2°C colder | 915 mm |
| Saint-Donat-sur-l'Herbasse 19 km | Marsaz | 29.0°C 2.1°C warmer | 0.7°C about the same | 883 mm |
| Chatte 20 km | Chatte | 28.3°C 1.4°C warmer | −0.5°C 1°C colder | 968 mm |
Le Grand-Serre weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Christophe-L station; sunshine at Grenoble-Saint-Geoirs.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.2°C | 0.5°C | 3.4°C | 69 mm | 91 |
| February | 7.7°C | 0.6°C | 4.2°C | 54 mm | 112 |
| March | 12.5°C | 3.4°C | 7.9°C | 66 mm | 173 |
| April | 16.1°C | 5.9°C | 11.0°C | 85 mm | 190 |
| May | 20.2°C | 9.6°C | 14.9°C | 97 mm | 221 |
| June | 24.3°C | 13.2°C | 18.7°C | 70 mm | 258 |
| July | 26.9°C | 15.4°C | 21.2°C | 68 mm | 292 |
| August | 26.8°C | 15.4°C | 21.1°C | 76 mm | 263 |
| September | 21.9°C | 11.9°C | 16.9°C | 112 mm | 199 |
| October | 16.6°C | 8.7°C | 12.6°C | 124 mm | 140 |
| November | 10.3°C | 4.1°C | 7.2°C | 116 mm | 91 |
| December | 6.8°C | 1.3°C | 4.0°C | 66 mm | 78 |
| Year | 16.4°C | 7.5°C | 11.9°C | 1,004 mm | 2,108 |
Where Le Grand-Serre’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Christophe-L, 5 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, 20 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 Drôme.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Le Grand-Serre’s climate
How warm does Le Grand-Serre get in summer?
July is the warmest month, with average highs of 26.9°C. About 69 days a year reach 25°C, more than 62% of mainland French towns, and about 20 reach 30°C.
How cold does Le Grand-Serre get in winter?
January nights average 0.5°C. The air drops to 0°C or below on about 51 nights a year, and about 9 days a year stay below freezing all day.
How much rain does Le Grand-Serre get?
About 1,004 mm a year, more than 87% of mainland French towns. October is the wettest month (124 mm) and February the driest (54 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Grenoble-Saint-Geoirs (20 km away), averages 2,108 hours of sunshine a year.
Are these figures for Le Grand-Serre itself?
No: they are the normals of the Météo-France station matched to Le Grand-Serre, Saint-Christophe-L, 5 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 ST-CHRISTOPHE-L_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Le Grand-Serre →
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.