Summer afternoons in Cornas are warmer than in 91% of mainland French towns
The coldest hours of a January night bottom out at 1.4°C on average. A year here swings 28°C from midwinter lows to midsummer highs. Rain is plentiful here, more than falls on 73% of mainland French towns. Gritters and ice scrapers earn their keep on roughly 39 nights a year below 0°C.
These are the figures of Météo-France’s Mercurol station, 11 km north.
A year in Cornas at a glance
Each month’s typical high and low in °C, at the Mercurol station.
What a year in Cornas feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Mercurol.
About 864 mm of rain a year
October is the wettest month and February the driest. About 25 days a year bring 10 mm or more. 16th wettest of 22 towns of 2,500+ in Ardèche.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Colombier Jeune Rad
39 frosts and 101 days of 25°C a year
On about 39 nights a year the air drops to 0°C or below, and on about 3 days it stays below freezing all day. About 101 days a year reach 25°C, and 42 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Mercurol: 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 Mercurol
Mercurol is 11 km north of Cornas. Every figure on this page is the station’s, not a measurement in Cornas itself.
| Station (Météo-France number) | Mercurol (26179001) |
| Distance from the town | 11 km north |
| Station altitude | 153 m |
| Town altitude (its center) | 127 m |
| Period | 1993–2020 (the station’s own record) |
| Sunshine measured at | Colombier Jeune Rad, 15 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 Cornas 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 |
|---|---|---|---|---|
| Cornas | Mercurol | 29.6°C | 1.4°C | 864 mm |
| Saint-Péray 2.6 km | Valence-Chabeui | 29.4°C about the same | 1.0°C about the same | 874 mm |
| Guilherand-Granges 3.8 km | Valence-Chabeui | 29.4°C about the same | 1.0°C about the same | 874 mm |
| Bourg-lès-Valence 4 km | Valence-Chabeui | 29.4°C about the same | 1.0°C about the same | 874 mm |
| Pont-de-l'Isère 5.2 km | same station | 29.6°C about the same | 1.4°C about the same | 864 mm |
| Valence 5.8 km | Valence-Chabeui | 29.4°C about the same | 1.0°C about the same | 874 mm |
| La Roche-de-Glun 5.8 km | same station | 29.6°C about the same | 1.4°C about the same | 864 mm |
Cornas weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Mercurol station; sunshine at Colombier Jeune Rad.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 8.0°C | 1.4°C | 4.7°C | 58 mm | 73 |
| February | 9.9°C | 1.7°C | 5.8°C | 41 mm | 99 |
| March | 14.8°C | 4.2°C | 9.5°C | 42 mm | 168 |
| April | 18.4°C | 7.0°C | 12.7°C | 66 mm | 188 |
| May | 22.6°C | 10.9°C | 16.7°C | 80 mm | 218 |
| June | 27.0°C | 14.3°C | 20.7°C | 55 mm | 261 |
| July | 29.6°C | 16.0°C | 22.8°C | 55 mm | 282 |
| August | 29.2°C | 15.6°C | 22.4°C | 68 mm | 253 |
| September | 24.1°C | 12.0°C | 18.1°C | 102 mm | 197 |
| October | 18.9°C | 9.1°C | 14.0°C | 131 mm | 123 |
| November | 12.3°C | 4.8°C | 8.5°C | 115 mm | 81 |
| December | 8.5°C | 2.1°C | 5.3°C | 52 mm | 62 |
| Year | 18.6°C | 8.3°C | 13.4°C | 864 mm | 2,003 |
Where Cornas’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Mercurol, 11 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, Colombier Jeune Rad, 15 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 Cornas’s climate
How warm does Cornas get in summer?
July is the warmest month, with average highs of 29.6°C. About 101 days a year reach 25°C, more than 89% of mainland French towns, and about 42 reach 30°C.
How cold does Cornas get in winter?
January nights average 1.4°C. The air drops to 0°C or below on about 39 nights a year, and about 3 days a year stay below freezing all day.
How much rain does Cornas get?
About 864 mm a year, more than 73% of mainland French towns. October is the wettest month (131 mm) and February the driest (41 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Colombier Jeune Rad (15 km away), averages 2,003 hours of sunshine a year.
Are these figures for Cornas itself?
No: they are the normals of the Météo-France station matched to Cornas, Mercurol, 11 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 MERCUROL, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Cornas →
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.