Cheyssieu gets more days of 25 degrees or more than 93% of mainland French towns
Nights in January average 0.7°C. Its January nights bite harder than in 78% of mainland French towns. Rain follows the seasons: October brings about 2.8 times as much as February. The heating season runs November to March: each of those months averages under 10°C.
These are the figures of Météo-France’s Sablons station, 12 km south-west.
A year in Cheyssieu at a glance
Each month’s typical high and low in °C, at the Sablons station.
What a year in Cheyssieu feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Sablons.
About 805 mm of rain a year
October is the wettest month and February the driest. About 24 days a year bring 10 mm or more. 104th wettest of 110 towns of 2,500+ in Isère.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Lyon-Bron
A frosty town: 57 frosts and 113 days of 25°C a year
On about 57 nights a year the air drops to 0°C or below, and on about 2 days it stays below freezing all day. About 113 days a year reach 25°C, and 52 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Sablons: 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 Sablons
Sablons is 12 km south-west of Cheyssieu. Every figure on this page is the station’s, not a measurement in Cheyssieu itself.
| Station (Météo-France number) | Sablons (38349001) |
| Distance from the town | 12 km south-west |
| Station altitude | 136 m |
| Town altitude (its center) | 214 m |
| Period | 1991–2020 |
| Nearest station of any kind | 6.3 km |
| Sunshine measured at | Lyon-Bron, 34 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 Cheyssieu 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 |
|---|---|---|---|---|
| Cheyssieu | Sablons | 30.2°C | 0.7°C | 805 mm |
| Saint-Clair-du-Rhône 5.3 km | same station | 30.2°C about the same | 0.7°C about the same | 805 mm |
| Saint-Maurice-l'Exil 6 km | same station | 30.2°C about the same | 0.7°C about the same | 805 mm |
| Roussillon 6.6 km | same station | 30.2°C about the same | 0.7°C about the same | 805 mm |
| Le Péage-de-Roussillon 6.8 km | same station | 30.2°C about the same | 0.7°C about the same | 805 mm |
| Condrieu 7.2 km | same station | 30.2°C about the same | 0.7°C about the same | 805 mm |
| Ampuis 7.8 km | same station | 30.2°C about the same | 0.7°C about the same | 805 mm |
Cheyssieu weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Sablons station; sunshine at Lyon-Bron.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 8.4°C | 0.7°C | 4.5°C | 51 mm | 71 |
| February | 10.5°C | 0.7°C | 5.6°C | 38 mm | 102 |
| March | 15.7°C | 3.1°C | 9.4°C | 45 mm | 174 |
| April | 19.2°C | 5.9°C | 12.6°C | 62 mm | 198 |
| May | 23.6°C | 9.9°C | 16.8°C | 74 mm | 224 |
| June | 27.8°C | 13.4°C | 20.6°C | 65 mm | 257 |
| July | 30.2°C | 14.9°C | 22.6°C | 68 mm | 288 |
| August | 29.9°C | 14.5°C | 22.2°C | 63 mm | 263 |
| September | 24.9°C | 11.2°C | 18.0°C | 84 mm | 204 |
| October | 19.3°C | 8.4°C | 13.9°C | 107 mm | 131 |
| November | 12.7°C | 4.2°C | 8.5°C | 99 mm | 79 |
| December | 8.8°C | 1.5°C | 5.1°C | 50 mm | 59 |
| Year | 19.2°C | 7.4°C | 13.3°C | 805 mm | 2,050 |
Where Cheyssieu’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Sablons, 12 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, Lyon-Bron, 34 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 Cheyssieu’s climate
How warm does Cheyssieu get in summer?
July is the warmest month, with average highs of 30.2°C. About 113 days a year reach 25°C, more than 93% of mainland French towns, and about 52 reach 30°C.
How cold does Cheyssieu get in winter?
January nights average 0.7°C. The air drops to 0°C or below on about 57 nights a year, and about 2 days a year stay below freezing all day.
How much rain does Cheyssieu get?
About 805 mm a year, more than 61% of mainland French towns. October is the wettest month (107 mm) and February the driest (38 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Lyon-Bron (34 km away), averages 2,050 hours of sunshine a year.
Are these figures for Cheyssieu itself?
No: they are the normals of the Météo-France station matched to Cheyssieu, Sablons, 12 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 SABLONS, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Cheyssieu →
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.