Winter nights in Saint-Romain-en-Jarez are colder than in 80% of mainland French towns
In July the day’s top temperature is typically 25.5°C. November is the wettest month, February the driest. Rain is plentiful here, more than falls on 71% of mainland French towns. Wet days, with 1 mm of rain or more, come about 106 times a year.
These are the figures of Météo-France’s Saint-Didier-River station, 5.9 km north-east.
A year in Saint-Romain-en-Jarez at a glance
Each month’s typical high and low in °C, at the Saint-Didier-River station.
What a year in Saint-Romain-en-Jarez feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Didier-River.
About 856 mm of rain a year
November is the wettest month and February the driest. About 25 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: 50 frosts and 53 days of 25°C a year
On about 50 nights a year the air drops to 0°C or below, and on about 9 days it stays below freezing all day. About 53 days a year reach 25°C, and 11 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Didier-River: 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-Didier-River
Saint-Didier-River is 5.9 km north-east of Saint-Romain-en-Jarez. Every figure on this page is the station’s, not a measurement in Saint-Romain-en-Jarez itself.
| Station (Météo-France number) | Saint-Didier-River (69195002) |
| Distance from the town | 5.9 km north-east |
| Station altitude | 600 m |
| Town altitude (its center) | 551 m |
| Period | 1991–2020 |
| Sunshine measured at | Saint-Étienne-Bouthéon, 19 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 Saint-Romain-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-Romain-en-Jarez | Saint-Didier-River | 25.5°C | 0.5°C | 856 mm |
| Genilac 4.5 km | Mornant | 28.1°C 2.6°C warmer | 0.0°C 0.5°C colder | 759 mm |
| Saint-Martin-la-Plaine 5.2 km | Mornant | 28.1°C 2.6°C warmer | 0.0°C 0.5°C colder | 759 mm |
| Lorette 6.4 km | Mornant | 28.1°C 2.6°C warmer | 0.0°C 0.5°C colder | 759 mm |
| La Grand-Croix 6.6 km | Mornant | 28.1°C 2.6°C warmer | 0.0°C 0.5°C colder | 759 mm |
| Rive-de-Gier 6.9 km | Mornant | 28.1°C 2.6°C warmer | 0.0°C 0.5°C colder | 759 mm |
| L'Horme 7.8 km | Mornant | 28.1°C 2.6°C warmer | 0.0°C 0.5°C colder | 759 mm |
Saint-Romain-en-Jarez weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Didier-River station; sunshine at Saint-Étienne-Bouthéon.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.3°C | 0.5°C | 3.4°C | 56 mm | 81 |
| February | 7.5°C | 0.7°C | 4.1°C | 46 mm | 109 |
| March | 11.9°C | 3.6°C | 7.8°C | 52 mm | 162 |
| April | 15.0°C | 6.1°C | 10.5°C | 71 mm | 186 |
| May | 18.9°C | 9.9°C | 14.4°C | 83 mm | 214 |
| June | 22.9°C | 13.6°C | 18.3°C | 77 mm | 241 |
| July | 25.5°C | 15.8°C | 20.7°C | 77 mm | 275 |
| August | 25.5°C | 15.8°C | 20.6°C | 71 mm | 259 |
| September | 20.8°C | 12.0°C | 16.4°C | 84 mm | 193 |
| October | 15.7°C | 8.7°C | 12.2°C | 91 mm | 135 |
| November | 10.2°C | 4.1°C | 7.2°C | 93 mm | 88 |
| December | 7.1°C | 1.4°C | 4.2°C | 56 mm | 76 |
| Year | 15.6°C | 7.7°C | 11.6°C | 856 mm | 2,018 |
Where Saint-Romain-en-Jarez’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Didier-River, 5.9 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, 19 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-Romain-en-Jarez’s climate
How warm does Saint-Romain-en-Jarez get in summer?
July is the warmest month, with average highs of 25.5°C. About 53 days a year reach 25°C, fewer than 65% of mainland French towns, and about 11 reach 30°C.
How cold does Saint-Romain-en-Jarez get in winter?
January nights average 0.5°C. The air drops to 0°C or below on about 50 nights a year, and about 9 days a year stay below freezing all day.
How much rain does Saint-Romain-en-Jarez get?
About 856 mm a year, more than 71% of mainland French towns. November is the wettest month (93 mm) and February the driest (46 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Étienne-Bouthéon (19 km away), averages 2,018 hours of sunshine a year.
Are these figures for Saint-Romain-en-Jarez itself?
No: they are the normals of the Météo-France station matched to Saint-Romain-en-Jarez, Saint-Didier-River, 5.9 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-DIDIER-RIVER, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Saint-Romain-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.