In Coësmes, July heat, January chill and rainfall all sit near the middle of mainland French towns
About 826 mm of rain falls in a typical year; July afternoons reach 25.4°C and January nights drop to 2.8°C. A year here swings 23°C from midwinter lows to midsummer highs. Winters are mild: January nights here are milder than in 69% of mainland French towns. Warm coats and heating bills mark the months from November to March, when means dip under 10°C.
These are the figures of Météo-France’s Soudan station, 20 km south-east.
A year in Coësmes at a glance
Each month’s typical high and low in °C, at the Soudan station.
What a year in Coësmes feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Soudan.
About 826 mm of rain a year
December is the wettest month and July the driest. About 24 days a year bring 10 mm or more. 16th wettest of 99 towns of 2,500+ in Ille-et-Vilaine.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Rennes-Saint-Jacques
41 frosts and 53 days of 25°C a year
On about 41 nights a year the air drops to 0°C or below, and on about 1 days it stays below freezing all day. About 53 days a year reach 25°C, and 12 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Soudan: 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 Soudan
Soudan is 20 km south-east of Coësmes. Every figure on this page is the station’s, not a measurement in Coësmes itself.
| Station (Météo-France number) | Soudan (44199002) |
| Distance from the town | 20 km south-east |
| Station altitude | 77 m |
| Town altitude (its center) | 72 m |
| Period | 1994–2020 (the station’s own record) |
| Nearest station of any kind | 11 km |
| Sunshine measured at | Rennes-Saint-Jacques, 31 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 Coësmes 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 Ille-et-Vilaine.
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 |
|---|---|---|---|---|
| Coësmes | Soudan | 25.4°C | 2.8°C | 826 mm |
| Retiers 5.6 km | same station | 25.4°C about the same | 2.8°C about the same | 826 mm |
| Martigné-Ferchaud 9.4 km | same station | 25.4°C about the same | 2.8°C about the same | 826 mm |
| Janzé 10 km | Rennes-Saint-Jacques | 24.8°C 0.6°C cooler | 3.3°C 0.5°C milder | 691 mm |
| Piré-Chancé 15 km | Rennes-Saint-Jacques | 24.8°C 0.6°C cooler | 3.3°C 0.5°C milder | 691 mm |
| Corps-Nuds 16 km | Rennes-Saint-Jacques | 24.8°C 0.6°C cooler | 3.3°C 0.5°C milder | 691 mm |
| La Guerche-de-Bretagne 16 km | same station | 25.4°C about the same | 2.8°C about the same | 826 mm |
Coësmes weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Soudan station; sunshine at Rennes-Saint-Jacques.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.0°C | 2.8°C | 5.9°C | 90 mm | 68 |
| February | 10.3°C | 2.6°C | 6.5°C | 73 mm | 93 |
| March | 13.3°C | 3.9°C | 8.6°C | 58 mm | 134 |
| April | 16.2°C | 5.3°C | 10.7°C | 59 mm | 174 |
| May | 19.6°C | 8.6°C | 14.1°C | 62 mm | 202 |
| June | 23.2°C | 11.5°C | 17.3°C | 57 mm | 213 |
| July | 25.4°C | 13.1°C | 19.2°C | 47 mm | 220 |
| August | 25.4°C | 13.0°C | 19.2°C | 49 mm | 207 |
| September | 22.3°C | 10.5°C | 16.4°C | 61 mm | 181 |
| October | 17.6°C | 8.7°C | 13.2°C | 81 mm | 117 |
| November | 12.6°C | 5.4°C | 9.0°C | 89 mm | 84 |
| December | 9.5°C | 3.1°C | 6.3°C | 100 mm | 69 |
| Year | 17.0°C | 7.4°C | 12.2°C | 826 mm | 1,762 |
Where Coësmes’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Soudan, 20 km away: statistics for 1991–2020 (the station’s own years, 1994–2020, 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, Rennes-Saint-Jacques, 31 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 Ille-et-Vilaine.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Coësmes’s climate
How warm does Coësmes get in summer?
July is the warmest month, with average highs of 25.4°C. About 53 days a year reach 25°C, fewer than 64% of mainland French towns, and about 12 reach 30°C.
How cold does Coësmes get in winter?
February nights average 2.6°C. The air drops to 0°C or below on about 41 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Coësmes get?
About 826 mm a year, more than 67% of mainland French towns. December is the wettest month (100 mm) and July the driest (47 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Rennes-Saint-Jacques (31 km away), averages 1,762 hours of sunshine a year.
Are these figures for Coësmes itself?
No: they are the normals of the Météo-France station matched to Coësmes, Soudan, 20 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 SOUDAN, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Coësmes →
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.