Weather without surprises: Saint-Mesmin keeps close to the norm for mainland French towns
July afternoons reach 25.9°C on a typical day and January nights drop to 2.4°C; 852 mm of rain falls in a year. By rainfall alone, it ranks wetter than 70% of mainland French towns. December is the wettest month, July the driest. Wet days, with 1 mm of rain or more, come about 123 times a year.
These are the figures of Météo-France’s Bressuire station, 18 km east.
A year in Saint-Mesmin at a glance
Each month’s typical high and low in °C, at the Bressuire station.
What a year in Saint-Mesmin feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Bressuire.
About 852 mm of rain a year
December is the wettest month and July the driest. About 26 days a year bring 10 mm or more. 39th wettest of 75 towns of 2,500+ in Vendée.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at La Roche-sur-Yon
40 frosts and 57 days of 25°C a year
On about 40 nights a year the air drops to 0°C or below, and on about 4 days it stays below freezing all day. About 57 days a year reach 25°C, and 16 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Bressuire: 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 Bressuire
Bressuire is 18 km east of Saint-Mesmin. Every figure on this page is the station’s, not a measurement in Saint-Mesmin itself.
| Station (Météo-France number) | Bressuire (79049004) |
| Distance from the town | 18 km east |
| Station altitude | 191 m |
| Town altitude (its center) | 171 m |
| Period | 1991–2020 |
| Sunshine measured at | La Roche-sur-Yon, 50 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 Saint-Mesmin 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 Vendée.
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 |
|---|---|---|---|---|
| Saint-Mesmin | Bressuire | 25.9°C | 2.4°C | 852 mm |
| Cerizay 5.9 km | same station | 25.9°C about the same | 2.4°C about the same | 852 mm |
| Pouzauges 7.6 km | same station | 25.9°C about the same | 2.4°C about the same | 852 mm |
| Sèvremont 9.9 km | same station | 25.9°C about the same | 2.4°C about the same | 852 mm |
| Le Boupère 14 km | Cholet | 25.0°C 0.9°C cooler | 2.9°C 0.5°C milder | 773 mm |
| Moncoutant-sur-Sèvre 15 km | same station | 25.9°C about the same | 2.4°C about the same | 852 mm |
| Les Epesses 16 km | Cholet | 25.0°C 0.9°C cooler | 2.9°C 0.5°C milder | 773 mm |
Saint-Mesmin weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Bressuire station; sunshine at La Roche-sur-Yon.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.9°C | 2.4°C | 5.2°C | 92 mm | 74 |
| February | 9.0°C | 2.0°C | 5.5°C | 68 mm | 106 |
| March | 12.6°C | 3.8°C | 8.2°C | 65 mm | 151 |
| April | 15.6°C | 5.4°C | 10.5°C | 64 mm | 184 |
| May | 19.6°C | 8.8°C | 14.2°C | 67 mm | 211 |
| June | 23.4°C | 11.9°C | 17.7°C | 52 mm | 229 |
| July | 25.9°C | 13.6°C | 19.7°C | 51 mm | 241 |
| August | 26.0°C | 13.5°C | 19.8°C | 51 mm | 236 |
| September | 22.1°C | 10.8°C | 16.4°C | 59 mm | 199 |
| October | 16.9°C | 8.9°C | 12.9°C | 97 mm | 129 |
| November | 11.6°C | 5.2°C | 8.4°C | 89 mm | 89 |
| December | 8.5°C | 2.8°C | 5.7°C | 98 mm | 74 |
| Year | 16.6°C | 7.4°C | 12.0°C | 852 mm | 1,922 |
Where Saint-Mesmin’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Bressuire, 18 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, La Roche-sur-Yon, 50 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 Vendée.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Saint-Mesmin’s climate
How warm does Saint-Mesmin get in summer?
August is the warmest month, with average highs of 26.0°C. About 57 days a year reach 25°C, fewer than 56% of mainland French towns, and about 16 reach 30°C.
How cold does Saint-Mesmin get in winter?
February nights average 2.0°C. The air drops to 0°C or below on about 40 nights a year, and about 4 days a year stay below freezing all day.
How much rain does Saint-Mesmin get?
About 852 mm a year, more than 70% of mainland French towns. December is the wettest month (98 mm) and July the driest (51 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, La Roche-sur-Yon (50 km away), averages 1,922 hours of sunshine a year.
Are these figures for Saint-Mesmin itself?
No: they are the normals of the Météo-France station matched to Saint-Mesmin, Bressuire, 18 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 BRESSUIRE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Saint-Mesmin →
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.