Summer arrives softly in Saint-Germain-sur-Ay, cooler than in 94% of mainland French towns
Deep winter brings January lows near 3.2°C. It is a wet place: more rain falls here than on 91% of mainland French towns. December is the wettest month, June the driest. For walks and days out, the stretch from May to September brings highs of 18–23°C.
Figures from Météo-France’s Coutances station, 24 km south-east.
A year in Saint-Germain-sur-Ay at a glance
Each month’s typical high and low in °C, at the Coutances station.
What a year in Saint-Germain-sur-Ay feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Coutances.
About 1,093 mm of rain a year
December is the wettest month and June the driest. About 36 days a year bring 10 mm or more. 3rd wettest of 39 towns of 2,500+ in Manche.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Dinard
27 frosts and 23 days of 25°C a year
On about 27 nights a year the air drops to 0°C or below, and on about under 1 days it stays below freezing all day. About 23 days a year reach 25°C, and 3 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Coutances: 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 Coutances
Coutances is 24 km south-east of Saint-Germain-sur-Ay. Every figure on this page is the station’s, not a measurement in Saint-Germain-sur-Ay itself.
| Station (Météo-France number) | Coutances (50147001) |
| Distance from the town | 24 km south-east |
| Station altitude | 80 m |
| Town altitude (its center) | 10 m |
| Period | 1991–2020 |
| Nearest station of any kind | 14 km |
| Sunshine measured at | Dinard, 79 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-Germain-sur-Ay 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 Manche.
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-Germain-sur-Ay | Coutances | 22.5°C | 3.2°C | 1,093 mm |
| La Haye 7.9 km | same station | 22.5°C about the same | 3.2°C about the same | 1,093 mm |
| Port-Bail-sur-Mer 12 km | Cherbourg-Homet | 20.2°C 2.3°C cooler | 5.4°C 2.2°C milder | 964 mm |
| Gouville-sur-Mer 15 km | same station | 22.5°C about the same | 3.2°C about the same | 1,093 mm |
| Saint-Sauveur-Villages 19 km | same station | 22.5°C about the same | 3.2°C about the same | 1,093 mm |
| Agon-Coutainville 21 km | same station | 22.5°C about the same | 3.2°C about the same | 1,093 mm |
| Picauville 22 km | Sainte-Marie du Mo | 21.6°C 0.9°C cooler | 3.6°C about the same | 890 mm |
Saint-Germain-sur-Ay weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Coutances station; sunshine at Dinard.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 8.8°C | 3.2°C | 6.0°C | 110 mm | 69 |
| February | 9.6°C | 3.0°C | 6.3°C | 87 mm | 91 |
| March | 12.0°C | 4.4°C | 8.2°C | 76 mm | 133 |
| April | 14.7°C | 5.9°C | 10.3°C | 72 mm | 179 |
| May | 17.8°C | 8.8°C | 13.3°C | 69 mm | 203 |
| June | 20.6°C | 11.6°C | 16.1°C | 65 mm | 208 |
| July | 22.5°C | 13.4°C | 17.9°C | 67 mm | 221 |
| August | 22.5°C | 13.4°C | 17.9°C | 80 mm | 201 |
| September | 20.3°C | 11.3°C | 15.8°C | 82 mm | 170 |
| October | 16.4°C | 9.1°C | 12.7°C | 120 mm | 114 |
| November | 12.3°C | 6.0°C | 9.2°C | 122 mm | 80 |
| December | 9.4°C | 3.6°C | 6.5°C | 144 mm | 66 |
| Year | 15.6°C | 7.8°C | 11.7°C | 1,093 mm | 1,733 |
Where Saint-Germain-sur-Ay’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Coutances, 24 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, Dinard, 79 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 Manche.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Saint-Germain-sur-Ay’s climate
How warm does Saint-Germain-sur-Ay get in summer?
July is the warmest month, with average highs of 22.5°C. About 23 days a year reach 25°C, fewer than 94% of mainland French towns, and about 3 reach 30°C.
How cold does Saint-Germain-sur-Ay get in winter?
February nights average 3.0°C. The air drops to 0°C or below on about 27 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Saint-Germain-sur-Ay get?
About 1,093 mm a year, more than 91% of mainland French towns. December is the wettest month (144 mm) and June the driest (65 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Dinard (79 km away), averages 1,733 hours of sunshine a year.
Are these figures for Saint-Germain-sur-Ay itself?
No: they are the normals of the Météo-France station matched to Saint-Germain-sur-Ay, Coutances, 24 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 COUTANCES, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Saint-Germain-sur-Ay →
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.