Hardly any mainland French towns see harsher January nights than Cornillon-en-Trièves
In July the day’s top temperature is typically 25.0°C. The gap between a January night and a July afternoon is 27°C. Rain is plentiful here, more than falls on 89% of mainland French towns. The heating season runs November to April: each of those months averages under 10°C.
These are the figures of Météo-France’s Monestier station, 11 km north-west.
A year in Cornillon-en-Trièves at a glance
Each month’s typical high and low in °C, at the Monestier station.
What a year in Cornillon-en-Trièves feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Monestier.
About 1,063 mm of rain a year
November is the wettest month and July the driest. About 36 days a year bring 10 mm or more. 43rd wettest of 110 towns of 2,500+ in Isère.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Grenoble-Saint-Geoirs
A frosty town: 93 frosts and 50 days of 25°C a year
On about 93 nights a year the air drops to 0°C or below, and on about 17 days it stays below freezing all day. About 50 days a year reach 25°C, and 11 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Monestier: 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 Monestier
Monestier is 11 km north-west of Cornillon-en-Trièves. Every figure on this page is the station’s, not a measurement in Cornillon-en-Trièves itself.
| Station (Météo-France number) | Monestier (38242001) |
| Distance from the town | 11 km north-west |
| Station altitude | 806 m |
| Town altitude (its center) | 856 m |
| Period | 1991–2020 |
| Nearest station of any kind | 7.8 km |
| Sunshine measured at | Grenoble-Saint-Geoirs, 67 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 Cornillon-en-Trièves 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 Isère.
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 |
|---|---|---|---|---|
| Cornillon-en-Trièves | Monestier | 25.0°C | −2.1°C | 1,063 mm |
| La Mure 9.8 km | same station | 25.0°C about the same | −2.1°C about the same | 1,063 mm |
| Saint-Georges-de-Commiers 22 km | Saint-Jean-en-Roya | 28.5°C 3.5°C warmer | −0.1°C 2°C milder | 1,136 mm |
| Vif 24 km | Saint-Jean-en-Roya | 28.5°C 3.5°C warmer | −0.1°C 2°C milder | 1,136 mm |
| Champ-sur-Drac 27 km | Chatte | 28.3°C 3.3°C warmer | −0.5°C 1.6°C milder | 968 mm |
| Vizille 27 km | Chatte | 28.3°C 3.3°C warmer | −0.5°C 1.6°C milder | 968 mm |
| Die 28 km | Die | 29.4°C 4.4°C warmer | −1.7°C about the same | 939 mm |
Cornillon-en-Trièves weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Monestier station; sunshine at Grenoble-Saint-Geoirs.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 4.9°C | −2.1°C | 1.4°C | 95 mm | 91 |
| February | 6.3°C | −2.0°C | 2.2°C | 71 mm | 112 |
| March | 10.8°C | 0.9°C | 5.9°C | 80 mm | 173 |
| April | 14.1°C | 3.6°C | 8.9°C | 85 mm | 190 |
| May | 18.4°C | 7.4°C | 12.9°C | 94 mm | 221 |
| June | 22.4°C | 10.9°C | 16.7°C | 75 mm | 258 |
| July | 25.0°C | 12.7°C | 18.9°C | 67 mm | 292 |
| August | 24.6°C | 12.8°C | 18.7°C | 80 mm | 263 |
| September | 19.8°C | 9.6°C | 14.7°C | 93 mm | 199 |
| October | 15.2°C | 6.5°C | 10.8°C | 103 mm | 140 |
| November | 9.0°C | 1.8°C | 5.4°C | 119 mm | 91 |
| December | 5.3°C | −1.1°C | 2.1°C | 102 mm | 78 |
| Year | 14.7°C | 5.1°C | 9.9°C | 1,063 mm | 2,108 |
Where Cornillon-en-Trièves’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Monestier, 11 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, Grenoble-Saint-Geoirs, 67 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 Isère.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Cornillon-en-Trièves’s climate
How warm does Cornillon-en-Trièves get in summer?
July is the warmest month, with average highs of 25.0°C. About 50 days a year reach 25°C, fewer than 68% of mainland French towns, and about 11 reach 30°C.
How cold does Cornillon-en-Trièves get in winter?
January nights average −2.1°C. The air drops to 0°C or below on about 93 nights a year, and about 17 days a year stay below freezing all day.
How much rain does Cornillon-en-Trièves get?
About 1,063 mm a year, more than 89% of mainland French towns. November is the wettest month (119 mm) and July the driest (67 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Grenoble-Saint-Geoirs (67 km away), averages 2,108 hours of sunshine a year.
Are these figures for Cornillon-en-Trièves itself?
No: they are the normals of the Météo-France station matched to Cornillon-en-Trièves, Monestier, 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 MONESTIER, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Cornillon-en-Trièves →
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.