Few mainland French towns get more frosts than Châtelus
July afternoons average 25.8°C. It is a wet place: more rain falls here than on 72% of mainland French towns. Only 27°C separates winter nights from summer afternoons. Long walks are most pleasant from June to September, when afternoons reach 21–26°C.
Figures from Météo-France’s Saint-Symphorien-C station, 5.1 km north.
A year in Châtelus at a glance
Each month’s typical high and low in °C, at the Saint-Symphorien-C station.
What a year in Châtelus feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Symphorien-C.
About 861 mm of rain a year
November is the wettest month and February the driest. About 26 days a year bring 10 mm or more. 3rd wettest of 53 towns of 2,500+ in Loire.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Saint-Étienne-Bouthéon
A frosty town: 82 frosts and 61 days of 25°C a year
On about 82 nights a year the air drops to 0°C or below, and on about 11 days it stays below freezing all day. About 61 days a year reach 25°C, and 17 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Symphorien-C: 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-Symphorien-C
Saint-Symphorien-C is 5.1 km north of Châtelus. Every figure on this page is the station’s, not a measurement in Châtelus itself.
| Station (Météo-France number) | Saint-Symphorien-C (69238001) |
| Distance from the town | 5.1 km north |
| Station altitude | 610 m |
| Town altitude (its center) | 696 m |
| Period | 1991–2020 |
| Nearest station of any kind | 3.6 km |
| Sunshine measured at | Saint-Étienne-Bouthéon, 14 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 Châtelus 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 Loire.
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 |
|---|---|---|---|---|
| Châtelus | Saint-Symphorien-C | 25.8°C | −1.1°C | 861 mm |
| Saint-Symphorien-sur-Coise 4.4 km | same station | 25.8°C about the same | −1.1°C about the same | 861 mm |
| Chazelles-sur-Lyon 7.6 km | Chazelles-Lyon | 25.2°C 0.6°C cooler | −0.7°C about the same | 764 mm |
| Saint-Héand 10 km | Chazelles-Lyon | 25.2°C 0.6°C cooler | −0.7°C about the same | 764 mm |
| Saint-Martin-en-Haut 11 km | same station | 25.8°C about the same | −1.1°C about the same | 861 mm |
| Sorbiers 11 km | Saint-Didier-River | 25.5°C about the same | 0.5°C 1.6°C milder | 856 mm |
| Genilac 11 km | Mornant | 28.1°C 2.3°C warmer | 0.0°C 1.1°C milder | 759 mm |
Châtelus weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Symphorien-C station; sunshine at Saint-Étienne-Bouthéon.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.6°C | −1.1°C | 2.7°C | 52 mm | 81 |
| February | 7.6°C | −1.1°C | 3.3°C | 43 mm | 109 |
| March | 11.7°C | 1.1°C | 6.4°C | 48 mm | 162 |
| April | 15.1°C | 3.3°C | 9.2°C | 70 mm | 186 |
| May | 19.3°C | 7.3°C | 13.3°C | 86 mm | 214 |
| June | 23.5°C | 10.8°C | 17.2°C | 84 mm | 241 |
| July | 25.8°C | 12.5°C | 19.2°C | 78 mm | 275 |
| August | 25.7°C | 12.2°C | 19.0°C | 79 mm | 259 |
| September | 21.0°C | 8.9°C | 15.0°C | 81 mm | 193 |
| October | 16.2°C | 6.3°C | 11.3°C | 90 mm | 135 |
| November | 10.4°C | 2.5°C | 6.4°C | 94 mm | 88 |
| December | 7.3°C | −0.2°C | 3.5°C | 58 mm | 76 |
| Year | 15.8°C | 5.2°C | 10.5°C | 861 mm | 2,018 |
Where Châtelus’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Symphorien-C, 5.1 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, Saint-Étienne-Bouthéon, 14 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 Loire.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Châtelus’s climate
How warm does Châtelus get in summer?
July is the warmest month, with average highs of 25.8°C. About 61 days a year reach 25°C, fewer than 50% of mainland French towns, and about 17 reach 30°C.
How cold does Châtelus get in winter?
January nights average −1.1°C. The air drops to 0°C or below on about 82 nights a year, and about 11 days a year stay below freezing all day.
How much rain does Châtelus get?
About 861 mm a year, more than 72% of mainland French towns. November is the wettest month (94 mm) and February the driest (43 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Étienne-Bouthéon (14 km away), averages 2,018 hours of sunshine a year.
Are these figures for Châtelus itself?
No: they are the normals of the Météo-France station matched to Châtelus, Saint-Symphorien-C, 5.1 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 ST-SYMPHORIEN-C, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Châtelus →
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.