Jonzieux sits near the bottom of mainland French towns for winter warmth
The warmest part of a July day comes in at 23.7°C on average. Of the 53 towns of 2,500+ in Loire, it has the coolest July afternoons. The rainiest month is October; the driest is February. The heating season runs November to April: each of those months averages under 10°C.
These are the figures of Météo-France’s Saint-Romain-Lachalm station, 6.6 km south-west.
A year in Jonzieux at a glance
Each month’s typical high and low in °C, at the Saint-Romain-Lachalm station.
What a year in Jonzieux feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Romain-Lachalm.
About 924 mm of rain a year
October is the wettest month and February the driest. About 28 days a year bring 10 mm or more. 2nd 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: 91 frosts and 40 days of 25°C a year
On about 91 nights a year the air drops to 0°C or below, and on about 22 days it stays below freezing all day. About 40 days a year reach 25°C, and 6 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Romain-Lachalm: 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-Romain-Lachalm
Saint-Romain-Lachalm is 6.6 km south-west of Jonzieux. Every figure on this page is the station’s, not a measurement in Jonzieux itself.
| Station (Météo-France number) | Saint-Romain-Lachalm (43223001) |
| Distance from the town | 6.6 km south-west |
| Station altitude | 902 m |
| Town altitude (its center) | 891 m |
| Period | 1991–2020 |
| Sunshine measured at | Saint-Étienne-Bouthéon, 26 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 Jonzieux 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 |
|---|---|---|---|---|
| Jonzieux | Saint-Romain-Lachalm | 23.7°C | −1.7°C | 924 mm |
| Saint-Just-Malmont 4.9 km | Monistrol-sur-Loire | 24.5°C 0.8°C warmer | −0.8°C 0.9°C milder | 822 mm |
| Saint-Genest-Malifaux 5.7 km | Tarentaise | 23.2°C 0.5°C cooler | −2.6°C 0.9°C colder | 1,128 mm |
| Saint-Didier-en-Velay 6.8 km | same station | 23.7°C about the same | −1.7°C about the same | 924 mm |
| Le Chambon-Feugerolles 9.2 km | Bas-en-Basset | 28.0°C 4.3°C warmer | −1.7°C about the same | 754 mm |
| Firminy 9.9 km | Bas-en-Basset | 28.0°C 4.3°C warmer | −1.7°C about the same | 754 mm |
| La Ricamarie 9.9 km | Saint-Didier-River | 25.5°C 1.8°C warmer | 0.5°C 2.2°C milder | 856 mm |
Jonzieux weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Romain-Lachalm station; sunshine at Saint-Étienne-Bouthéon.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 4.4°C | −1.7°C | 1.4°C | 56 mm | 81 |
| February | 5.3°C | −1.8°C | 1.7°C | 45 mm | 109 |
| March | 9.3°C | 0.7°C | 5.0°C | 47 mm | 162 |
| April | 12.5°C | 3.1°C | 7.8°C | 77 mm | 186 |
| May | 16.7°C | 6.8°C | 11.7°C | 101 mm | 214 |
| June | 21.1°C | 10.4°C | 15.7°C | 87 mm | 241 |
| July | 23.7°C | 12.4°C | 18.0°C | 79 mm | 275 |
| August | 23.7°C | 12.4°C | 18.0°C | 75 mm | 259 |
| September | 18.7°C | 8.9°C | 13.8°C | 93 mm | 193 |
| October | 14.0°C | 6.2°C | 10.1°C | 103 mm | 135 |
| November | 8.1°C | 1.8°C | 4.9°C | 103 mm | 88 |
| December | 5.3°C | −0.6°C | 2.4°C | 58 mm | 76 |
| Year | 13.6°C | 4.9°C | 9.2°C | 924 mm | 2,018 |
Where Jonzieux’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Romain-Lachalm, 6.6 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, 26 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 Jonzieux’s climate
How warm does Jonzieux get in summer?
July is the warmest month, with average highs of 23.7°C. About 40 days a year reach 25°C, fewer than 81% of mainland French towns, and about 6 reach 30°C.
How cold does Jonzieux get in winter?
February nights average −1.8°C. The air drops to 0°C or below on about 91 nights a year, and about 22 days a year stay below freezing all day.
How much rain does Jonzieux get?
About 924 mm a year, more than 81% of mainland French towns. October is the wettest month (103 mm) and February the driest (45 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Étienne-Bouthéon (26 km away), averages 2,018 hours of sunshine a year.
Are these figures for Jonzieux itself?
No: they are the normals of the Météo-France station matched to Jonzieux, Saint-Romain-Lachalm, 6.6 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-ROMAIN-LACHALM, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Jonzieux →
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.