Saint-Guyomard gets fewer days of 25 degrees or more than 81% of mainland French towns
The depth of winter brings overnight lows near 3.1°C. It is a wet place: more rain falls here than on 78% of mainland French towns. Of all months, December brings the most rain and July the least. An umbrella earns its place on about 124 days a year with 1 mm of rain or more.
These are the figures of Météo-France’s Pleucadeuc station, 9.1 km east.
A year in Saint-Guyomard at a glance
Each month’s typical high and low in °C, at the Pleucadeuc station.
What a year in Saint-Guyomard feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Pleucadeuc.
About 907 mm of rain a year
December is the wettest month and July the driest. About 27 days a year bring 10 mm or more. 71st wettest of 88 towns of 2,500+ in Morbihan.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Vannes-Séné
40 frosts and 40 days of 25°C a year
On about 40 nights a year the air drops to 0°C or below, and on about 1 days it stays below freezing all day. About 40 days a year reach 25°C, and 8 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Pleucadeuc: 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 Pleucadeuc
Pleucadeuc is 9.1 km east of Saint-Guyomard. Every figure on this page is the station’s, not a measurement in Saint-Guyomard itself.
| Station (Météo-France number) | Pleucadeuc (56159001) |
| Distance from the town | 9.1 km east |
| Station altitude | 65 m |
| Town altitude (its center) | 80 m |
| Period | 1991–2020 |
| Sunshine measured at | Vannes-Séné, 25 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-Guyomard 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. 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-Guyomard | Pleucadeuc | 24.3°C | 3.1°C | 907 mm |
| Sérent 4.9 km | same station | 24.3°C about the same | 3.1°C about the same | 907 mm |
| Elven 8.1 km | Questembert | 24.2°C about the same | 3.0°C about the same | 1,096 mm |
| Malestroit 9.7 km | same station | 24.3°C about the same | 3.1°C about the same | 907 mm |
| Plumelec 11 km | Bignan | 23.5°C 0.8°C cooler | 3.4°C about the same | 995 mm |
| Val d'Oust 11 km | Ploërmel | 24.2°C about the same | 3.3°C about the same | 767 mm |
| Questembert 13 km | Questembert | 24.2°C about the same | 3.0°C about the same | 1,096 mm |
Saint-Guyomard weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Pleucadeuc station; sunshine at Vannes-Séné.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.2°C | 3.1°C | 6.1°C | 109 mm | 75 |
| February | 10.1°C | 2.7°C | 6.4°C | 77 mm | 107 |
| March | 13.0°C | 4.0°C | 8.5°C | 62 mm | 157 |
| April | 15.7°C | 5.2°C | 10.4°C | 68 mm | 201 |
| May | 19.0°C | 8.4°C | 13.7°C | 61 mm | 222 |
| June | 22.1°C | 11.1°C | 16.6°C | 53 mm | 244 |
| July | 24.3°C | 12.7°C | 18.5°C | 48 mm | 255 |
| August | 24.4°C | 12.6°C | 18.5°C | 51 mm | 225 |
| September | 21.6°C | 10.2°C | 15.9°C | 67 mm | 202 |
| October | 16.9°C | 8.5°C | 12.7°C | 96 mm | 121 |
| November | 12.6°C | 5.4°C | 9.0°C | 102 mm | 93 |
| December | 9.7°C | 3.4°C | 6.5°C | 113 mm | 79 |
| Year | 16.5°C | 7.3°C | 11.9°C | 907 mm | 1,981 |
Where Saint-Guyomard’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Pleucadeuc, 9.1 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, Vannes-Séné, 25 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 Saint-Guyomard’s climate
How warm does Saint-Guyomard get in summer?
August is the warmest month, with average highs of 24.4°C. About 40 days a year reach 25°C, fewer than 81% of mainland French towns, and about 8 reach 30°C.
How cold does Saint-Guyomard get in winter?
February nights average 2.7°C. The air drops to 0°C or below on about 40 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Saint-Guyomard get?
About 907 mm a year, more than 78% of mainland French towns. December is the wettest month (113 mm) and July the driest (48 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Vannes-Séné (25 km away), averages 1,981 hours of sunshine a year.
Are these figures for Saint-Guyomard itself?
No: they are the normals of the Météo-France station matched to Saint-Guyomard, Pleucadeuc, 9.1 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 PLEUCADEUC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Saint-Guyomard →
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.