Lamastre is among the wettest of mainland French towns: 1,179 mm of rain a year
Midwinter brings lows of about 0.2°C. Of the 22 towns of 2,500+ in Ardèche, it has the coolest July afternoons. The gap between a January night and a July afternoon is 28°C. Waterproofs come out on about 94 days a year, each with 1 mm of rain or more.
Figures from Météo-France’s Cheylard Sa station, 14 km south-west.
A year in Lamastre at a glance
Each month’s typical high and low in °C, at the Cheylard Sa station.
What a year in Lamastre feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Cheylard Sa.
About 1,179 mm of rain a year
November is the wettest month and February the driest. About 31 days a year bring 10 mm or more. 3rd wettest of 22 towns of 2,500+ in Ardèche.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Colombier Jeune Rad
A frosty town: 56 frosts and 84 days of 25°C a year
On about 56 nights a year the air drops to 0°C or below, and on about 3 days it stays below freezing all day. About 84 days a year reach 25°C, and 30 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Cheylard Sa: 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 Cheylard Sa
Cheylard Sa is 14 km south-west of Lamastre. Every figure on this page is the station’s, not a measurement in Lamastre itself.
| Station (Météo-France number) | Cheylard Sa (07064001) |
| Distance from the town | 14 km south-west |
| Station altitude | 418 m |
| Town altitude (its center) | 373 m |
| Period | 1991–2020 |
| Nearest station of any kind | 8 km |
| Sunshine measured at | Colombier Jeune Rad, 8 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 Lamastre 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 Ardèche.
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 |
|---|---|---|---|---|
| Lamastre | Cheylard Sa | 28.3°C | 0.2°C | 1,179 mm |
| Le Cheylard 15 km | same station | 28.3°C about the same | 0.2°C about the same | 1,179 mm |
| Saint-Péray 21 km | Valence-Chabeui | 29.4°C 1.1°C warmer | 1.0°C 0.8°C milder | 874 mm |
| La Roche-de-Glun 22 km | Mercurol | 29.6°C 1.3°C warmer | 1.4°C 1.2°C milder | 864 mm |
| Tournon-sur-Rhône 22 km | Mercurol | 29.6°C 1.3°C warmer | 1.4°C 1.2°C milder | 864 mm |
| Le Chambon-sur-Lignon 23 km | Mazet-Volamont | 21.6°C 6.7°C cooler | −2.5°C 2.7°C colder | 975 mm |
| Tain-l'Hermitage 23 km | Mercurol | 29.6°C 1.3°C warmer | 1.4°C 1.2°C milder | 864 mm |
Lamastre weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Cheylard Sa station; sunshine at Colombier Jeune Rad.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 8.1°C | 0.2°C | 4.1°C | 85 mm | 73 |
| February | 9.7°C | 0.3°C | 5.0°C | 55 mm | 99 |
| March | 13.9°C | 2.7°C | 8.3°C | 62 mm | 168 |
| April | 17.0°C | 5.4°C | 11.2°C | 89 mm | 188 |
| May | 21.0°C | 8.8°C | 14.9°C | 97 mm | 218 |
| June | 25.4°C | 12.2°C | 18.8°C | 73 mm | 261 |
| July | 28.3°C | 14.1°C | 21.2°C | 68 mm | 282 |
| August | 28.0°C | 13.7°C | 20.9°C | 74 mm | 253 |
| September | 23.0°C | 10.6°C | 16.8°C | 127 mm | 197 |
| October | 17.7°C | 7.9°C | 12.8°C | 176 mm | 123 |
| November | 11.9°C | 3.7°C | 7.8°C | 180 mm | 81 |
| December | 8.5°C | 0.9°C | 4.7°C | 93 mm | 62 |
| Year | 17.7°C | 6.7°C | 12.2°C | 1,179 mm | 2,003 |
Where Lamastre’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Cheylard Sa, 14 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, Colombier Jeune Rad, 8 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 Ardèche.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Lamastre’s climate
How warm does Lamastre get in summer?
July is the warmest month, with average highs of 28.3°C. About 84 days a year reach 25°C, more than 75% of mainland French towns, and about 30 reach 30°C.
How cold does Lamastre get in winter?
January nights average 0.2°C. The air drops to 0°C or below on about 56 nights a year, and about 3 days a year stay below freezing all day.
How much rain does Lamastre get?
About 1,179 mm a year, more than 96% of mainland French towns. November is the wettest month (180 mm) and February the driest (55 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Colombier Jeune Rad (8 km away), averages 2,003 hours of sunshine a year.
Are these figures for Lamastre itself?
No: they are the normals of the Météo-France station matched to Lamastre, Cheylard Sa, 14 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 CHEYLARD SA, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Lamastre →
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.