Frost comes to Saint-Christo-en-Jarez more often than to 88% of mainland French towns
Midsummer highs settle at about 24.0°C. Wet weather is most frequent in May and least in February. None of the 53 towns of 2,500+ in Loire has cooler July afternoons. An umbrella earns its place on about 112 days a year with 1 mm of rain or more.
These are the figures of Météo-France’s Grammond station, 4.2 km north-west.
A year in Saint-Christo-en-Jarez at a glance
Each month’s typical high and low in °C, at the Grammond station.
What a year in Saint-Christo-en-Jarez feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Grammond.
About 832 mm of rain a year
May is the wettest month and February the driest. About 24 days a year bring 10 mm or more. 6th 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: 66 frosts and 41 days of 25°C a year
On about 66 nights a year the air drops to 0°C or below, and on about 20 days it stays below freezing all day. About 41 days a year reach 25°C, and 8 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Grammond: 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 Grammond
Grammond is 4.2 km north-west of Saint-Christo-en-Jarez. Every figure on this page is the station’s, not a measurement in Saint-Christo-en-Jarez itself.
| Station (Météo-France number) | Grammond (42102002) |
| Distance from the town | 4.2 km north-west |
| Station altitude | 803 m |
| Town altitude (its center) | 693 m |
| Period | 1993–2020 (the station’s own record) |
| Sunshine measured at | Saint-Étienne-Bouthéon, 14 km away |
Saint-Christo-en-Jarez sits 110 m lower than the station. Air usually warms by about 0.65°C every 100 m you go down, so expect Saint-Christo-en-Jarez to run about 0.7°C warmer 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 Saint-Christo-en-Jarez 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, each with its own matched station.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Saint-Christo-en-Jarez | Grammond | 24.0°C | −0.3°C | 832 mm |
| Sorbiers 5.5 km | Saint-Didier-River | 25.5°C 1.5°C warmer | 0.5°C 0.8°C milder | 856 mm |
| L'Horme 7.2 km | Mornant | 28.1°C 4.1°C warmer | 0.0°C about the same | 759 mm |
| La Talaudière 7.3 km | Saint-Étienne-Bouthéon | 26.9°C 2.9°C warmer | 0.3°C 0.6°C milder | 728 mm |
| La Grand-Croix 7.6 km | Mornant | 28.1°C 4.1°C warmer | 0.0°C about the same | 759 mm |
| Saint-Chamond 7.7 km | Saint-Étienne-Bouthéon | 26.9°C 2.9°C warmer | 0.3°C 0.6°C milder | 728 mm |
| Genilac 8 km | Mornant | 28.1°C 4.1°C warmer | 0.0°C about the same | 759 mm |
Saint-Christo-en-Jarez weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Grammond station; sunshine at Saint-Étienne-Bouthéon.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 4.7°C | −0.3°C | 2.2°C | 50 mm | 81 |
| February | 5.8°C | −0.3°C | 2.8°C | 41 mm | 109 |
| March | 9.9°C | 2.3°C | 6.1°C | 44 mm | 162 |
| April | 13.3°C | 4.8°C | 9.1°C | 65 mm | 186 |
| May | 17.4°C | 8.5°C | 12.9°C | 91 mm | 214 |
| June | 21.6°C | 12.1°C | 16.9°C | 80 mm | 241 |
| July | 24.0°C | 14.1°C | 19.0°C | 78 mm | 275 |
| August | 23.7°C | 14.1°C | 18.9°C | 81 mm | 259 |
| September | 19.0°C | 10.6°C | 14.8°C | 82 mm | 193 |
| October | 14.6°C | 7.9°C | 11.2°C | 82 mm | 135 |
| November | 8.4°C | 3.2°C | 5.8°C | 85 mm | 88 |
| December | 5.5°C | 0.7°C | 3.1°C | 52 mm | 76 |
| Year | 14.0°C | 6.5°C | 10.2°C | 832 mm | 2,018 |
Where Saint-Christo-en-Jarez’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Grammond, 4.2 km away: statistics for 1991–2020 (the station’s own years, 1993–2020, where its record is shorter).
- 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 Saint-Christo-en-Jarez’s climate
How warm does Saint-Christo-en-Jarez get in summer?
July is the warmest month, with average highs of 24.0°C. About 41 days a year reach 25°C, fewer than 80% of mainland French towns, and about 8 reach 30°C.
How cold does Saint-Christo-en-Jarez get in winter?
January nights average −0.3°C. The air drops to 0°C or below on about 66 nights a year, and about 20 days a year stay below freezing all day.
How much rain does Saint-Christo-en-Jarez get?
About 832 mm a year, more than 68% of mainland French towns. May is the wettest month (91 mm) and February the driest (41 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 Saint-Christo-en-Jarez itself?
No: they are the normals of the Météo-France station matched to Saint-Christo-en-Jarez, Grammond, 4.2 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 GRAMMOND_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Saint-Christo-en-Jarez →
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.