Bonson has colder winter nights than 82% of mainland French towns
July afternoons average 26.9°C. Summer afternoons here are warmer than in 67% of mainland French towns. Of all months, May brings the most rain and February the least. Frost greets about 60 mornings a year, so leave time to clear the car.
Figures from Météo-France’s Saint-Étienne-Bouthéon station, 6.4 km east.
A year in Bonson at a glance
Each month’s typical high and low in °C, at the Saint-Étienne-Bouthéon station.
What a year in Bonson feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Étienne-Bouthéon.
About 728 mm of rain a year
May is the wettest month and February the driest. About 21 days a year bring 10 mm or more. 23rd 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: 60 frosts and 70 days of 25°C a year
On about 60 nights a year the air drops to 0°C or below, and on about 7 days it stays below freezing all day. About 70 days a year reach 25°C, and 24 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Étienne-Bouthéon: 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-Étienne-Bouthéon
Saint-Étienne-Bouthéon is 6.4 km east of Bonson. Every figure on this page is the station’s, not a measurement in Bonson itself.
| Station (Météo-France number) | Saint-Étienne-Bouthéon (42005001) |
| Distance from the town | 6.4 km east |
| Station altitude | 395 m |
| Town altitude (its center) | 379 m |
| Period | 1991–2020 |
| Sunshine measured at | the same station |
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 Bonson 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 |
|---|---|---|---|---|
| Bonson | Saint-Étienne-Bouthéon | 26.9°C | 0.3°C | 728 mm |
| Sury-le-Comtal 3 km | same station | 26.9°C about the same | 0.3°C about the same | 728 mm |
| Saint-Just-Saint-Rambert 3.8 km | same station | 26.9°C about the same | 0.3°C about the same | 728 mm |
| Andrézieux-Bouthéon 3.8 km | same station | 26.9°C about the same | 0.3°C about the same | 728 mm |
| Saint-Marcellin-en-Forez 5.2 km | same station | 26.9°C about the same | 0.3°C about the same | 728 mm |
| Veauche 7 km | same station | 26.9°C about the same | 0.3°C about the same | 728 mm |
| Saint-Romain-le-Puy 8 km | Savigneux | 26.5°C about the same | −1.0°C 1.3°C colder | 665 mm |
Bonson weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Étienne-Bouthéon station.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.3°C | 0.3°C | 3.8°C | 38 mm | 81 |
| February | 8.8°C | 0.2°C | 4.5°C | 30 mm | 109 |
| March | 13.1°C | 2.6°C | 7.8°C | 34 mm | 162 |
| April | 16.3°C | 5.0°C | 10.7°C | 55 mm | 186 |
| May | 20.3°C | 9.0°C | 14.6°C | 82 mm | 214 |
| June | 24.5°C | 12.6°C | 18.5°C | 81 mm | 241 |
| July | 26.9°C | 14.4°C | 20.7°C | 77 mm | 275 |
| August | 26.9°C | 14.2°C | 20.6°C | 73 mm | 259 |
| September | 22.2°C | 10.7°C | 16.4°C | 70 mm | 193 |
| October | 17.3°C | 8.1°C | 12.7°C | 76 mm | 135 |
| November | 11.4°C | 3.7°C | 7.6°C | 73 mm | 88 |
| December | 8.0°C | 1.1°C | 4.6°C | 39 mm | 76 |
| Year | 16.9°C | 6.8°C | 11.9°C | 728 mm | 2,018 |
Where Bonson’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Étienne-Bouthéon, 6.4 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, 6.4 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 Bonson’s climate
How warm does Bonson get in summer?
July is the warmest month, with average highs of 26.9°C. About 70 days a year reach 25°C, more than 64% of mainland French towns, and about 24 reach 30°C.
How cold does Bonson get in winter?
February nights average 0.2°C. The air drops to 0°C or below on about 60 nights a year, and about 7 days a year stay below freezing all day.
How much rain does Bonson get?
About 728 mm a year, less than 61% of mainland French towns. May is the wettest month (82 mm) and February the driest (30 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Étienne-Bouthéon (6.4 km away), averages 2,018 hours of sunshine a year.
Are these figures for Bonson itself?
No: they are the normals of the Météo-France station matched to Bonson, Saint-Étienne-Bouthéon, 6.4 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 ETIENNE-BOUTHEON, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Bonson →
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.