Sourdeval is among the wettest of mainland French towns: 1,271 mm of rain a year
Peak summer warmth arrives in July, with afternoons near 21.5°C. Its July afternoons stay fresher than in 97% of mainland French towns. The rainiest month is December; the driest is June. Homes need heating from November to April, the months averaging under 10°C.
Figures from Météo-France’s Legast station, 12 km north-west.
A year in Sourdeval at a glance
Each month’s typical high and low in °C, at the Legast station.
What a year in Sourdeval feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Legast.
About 1,271 mm of rain a year
December is the wettest month and June the driest. About 43 days a year bring 10 mm or more. The wettest of 39 towns of 2,500+ in Manche.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Caen-Carpiquet
30 frosts and 19 days of 25°C a year
On about 30 nights a year the air drops to 0°C or below, and on about 3 days it stays below freezing all day. About 19 days a year reach 25°C, and 2 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Legast: 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 Legast
Legast is 12 km north-west of Sourdeval. Every figure on this page is the station’s, not a measurement in Sourdeval itself.
| Station (Météo-France number) | Legast (14296001) |
| Distance from the town | 12 km north-west |
| Station altitude | 336 m |
| Town altitude (its center) | 232 m |
| Period | 1997–2020 (the station’s own record) |
| Sunshine measured at | Caen-Carpiquet, 61 km away |
Sourdeval sits 104 m lower than the station. Air usually warms by about 0.65°C every 100 m you go down, so expect Sourdeval to run about 0.7°C warmer than these figures.
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 Sourdeval 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 |
|---|---|---|---|---|
| Sourdeval | Legast | 21.5°C | 2.2°C | 1,271 mm |
| Mortain-Bocage 11 km | Saint-Hilaire-du-H | 23.7°C 2.2°C warmer | 2.7°C 0.5°C milder | 930 mm |
| Vire Normandie 13 km | same station | 21.5°C about the same | 2.2°C about the same | 1,271 mm |
| Tinchebray-Bocage 14 km | same station | 21.5°C about the same | 2.2°C about the same | 1,271 mm |
| Noues de Sienne 15 km | same station | 21.5°C about the same | 2.2°C about the same | 1,271 mm |
| Grandparigny 19 km | Saint-Hilaire-du-H | 23.7°C 2.2°C warmer | 2.7°C 0.5°C milder | 930 mm |
| Valdallière 20 km | Saint-Georges D | 22.7°C 1.2°C warmer | 2.7°C 0.5°C milder | 992 mm |
Sourdeval weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Legast station; sunshine at Caen-Carpiquet.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.6°C | 2.2°C | 4.4°C | 127 mm | 71 |
| February | 7.5°C | 2.3°C | 4.9°C | 104 mm | 90 |
| March | 10.1°C | 3.8°C | 7.0°C | 95 mm | 130 |
| April | 13.5°C | 5.7°C | 9.6°C | 81 mm | 179 |
| May | 16.5°C | 8.7°C | 12.6°C | 86 mm | 203 |
| June | 19.5°C | 11.3°C | 15.4°C | 72 mm | 213 |
| July | 21.5°C | 12.9°C | 17.2°C | 83 mm | 219 |
| August | 21.3°C | 13.2°C | 17.2°C | 94 mm | 205 |
| September | 19.1°C | 11.3°C | 15.2°C | 88 mm | 171 |
| October | 14.7°C | 8.8°C | 11.7°C | 136 mm | 117 |
| November | 10.2°C | 5.4°C | 7.8°C | 136 mm | 82 |
| December | 7.5°C | 2.9°C | 5.2°C | 169 mm | 67 |
| Year | 14.0°C | 7.4°C | 10.7°C | 1,271 mm | 1,746 |
Where Sourdeval’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Legast, 12 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, Caen-Carpiquet, 61 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 Sourdeval’s climate
How warm does Sourdeval get in summer?
July is the warmest month, with average highs of 21.5°C. About 19 days a year reach 25°C, fewer than 96% of mainland French towns, and about 2 reach 30°C.
How cold does Sourdeval get in winter?
January nights average 2.2°C. The air drops to 0°C or below on about 30 nights a year, and about 3 days a year stay below freezing all day.
How much rain does Sourdeval get?
About 1,271 mm a year, more than 98% of mainland French towns. December is the wettest month (169 mm) and June the driest (72 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Caen-Carpiquet (61 km away), averages 1,746 hours of sunshine a year.
Are these figures for Sourdeval itself?
No: they are the normals of the Météo-France station matched to Sourdeval, Legast, 12 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 LEGAST_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Sourdeval →
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.