Fewer days reach 25 degrees in Grand-Champ than in 90% of mainland French towns
The coldest hours of a January night bottom out at 3.4°C on average. Of all months, December brings the most rain and July the least. Its yearly rainfall tops that of 87% of mainland French towns. Windscreens need scraping on about 32 mornings a year, the nights the air drops below 0°C.
These are the figures of Météo-France’s Bignan station, 17 km north-east.
A year in Grand-Champ at a glance
Each month’s typical high and low in °C, at the Bignan station.
What a year in Grand-Champ feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Bignan.
About 995 mm of rain a year
December is the wettest month and July the driest. About 31 days a year bring 10 mm or more. 26th wettest of 88 towns of 2,500+ in Morbihan.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Vannes-Séné
32 frosts and 32 days of 25°C a year
On about 32 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 32 days a year reach 25°C, and 5 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Bignan: 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 Bignan
Bignan is 17 km north-east of Grand-Champ. Every figure on this page is the station’s, not a measurement in Grand-Champ itself.
| Station (Météo-France number) | Bignan (56017003) |
| Distance from the town | 17 km north-east |
| Station altitude | 112 m |
| Town altitude (its center) | 124 m |
| Period | 1997–2020 (the station’s own record) |
| Nearest station of any kind | 11 km |
| Sunshine measured at | Vannes-Séné, 20 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 Grand-Champ 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 Morbihan.
Nearby towns’ climate
The nearest towns of 2,500+ within 29 km, each with its own matched station.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Grand-Champ | Bignan | 23.5°C | 3.4°C | 995 mm |
| Plumergat 6.5 km | Auray | 23.6°C about the same | 4.2°C 0.8°C milder | 969 mm |
| Plescop 7.3 km | Saint-Avé | 24.9°C 1.4°C warmer | 3.6°C about the same | 1,034 mm |
| Sainte-Anne-d'Auray 10 km | Auray | 23.6°C about the same | 4.2°C 0.8°C milder | 969 mm |
| Saint-Avé 11 km | Saint-Avé | 24.9°C 1.4°C warmer | 3.6°C about the same | 1,034 mm |
| Ploeren 11 km | Saint-Avé | 24.9°C 1.4°C warmer | 3.6°C about the same | 1,034 mm |
| Pluneret 12 km | Auray | 23.6°C about the same | 4.2°C 0.8°C milder | 969 mm |
Grand-Champ weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Bignan station; sunshine at Vannes-Séné.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.1°C | 3.4°C | 6.2°C | 115 mm | 75 |
| February | 9.9°C | 3.1°C | 6.5°C | 83 mm | 107 |
| March | 12.4°C | 4.2°C | 8.3°C | 75 mm | 157 |
| April | 15.4°C | 5.4°C | 10.4°C | 78 mm | 201 |
| May | 18.5°C | 8.6°C | 13.6°C | 66 mm | 222 |
| June | 21.5°C | 11.3°C | 16.4°C | 58 mm | 244 |
| July | 23.5°C | 12.6°C | 18.1°C | 52 mm | 255 |
| August | 23.4°C | 12.5°C | 18.0°C | 61 mm | 225 |
| September | 21.3°C | 10.4°C | 15.9°C | 56 mm | 202 |
| October | 16.7°C | 8.8°C | 12.8°C | 114 mm | 121 |
| November | 12.4°C | 5.7°C | 9.1°C | 111 mm | 93 |
| December | 9.6°C | 3.8°C | 6.7°C | 127 mm | 79 |
| Year | 16.1°C | 7.5°C | 11.8°C | 995 mm | 1,981 |
Where Grand-Champ’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Bignan, 17 km away: statistics for 1991–2020 (the station’s own years, 1997–2020, 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, Vannes-Séné, 20 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 Morbihan.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Grand-Champ’s climate
How warm does Grand-Champ get in summer?
July is the warmest month, with average highs of 23.5°C. About 32 days a year reach 25°C, fewer than 90% of mainland French towns, and about 5 reach 30°C.
How cold does Grand-Champ get in winter?
February nights average 3.1°C. The air drops to 0°C or below on about 32 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Grand-Champ get?
About 995 mm a year, more than 87% of mainland French towns. December is the wettest month (127 mm) and July the driest (52 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Vannes-Séné (20 km away), averages 1,981 hours of sunshine a year.
Are these figures for Grand-Champ itself?
No: they are the normals of the Météo-France station matched to Grand-Champ, Bignan, 17 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 BIGNAN, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Grand-Champ →
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.