Saint-Germain-de-la-Grange

Identity

Saint-Germain-de-la-Grange (INSEE 78550) is in Yvelines (78), part of CC Coeur d'Yvelines. Population 1,847 (2023). ^[1]

INSEE density class: Ceintures urbaines (level 4). ^[2]

Data vintages: INSEE BPE 2025 · INSEE SIRENE 2026-09 · INSEE census (RP) 2023 · INSEE COG 2026 · INSEE density grid 2026.

Permanent link: https://vivantrural.com/en/fr/78550-saint-germain-de-la-grange

Vitality score

Vitality score 25.1/100 — Few services (model fr-v0.2).

Confidence: high.

Better served than 6 % of the 10,130 communes of a similar size.

Compare this with communes of a similar size. The score measures how well a place is served relative to its own size band, and larger communes score higher as a rule — so it reads meaningfully against another village, and misleadingly against a town.

Measured but not scored in this model: Market. See the methodology for why.

Services

A school and somewhere to eat or drink, but no food shop. ^[3,4]

1 × Restaurant (LES CUPCAKES DE NANNY). ^[3,4]

1 × Nursery school (maternelle) (ECOLE MATERNELLE ELIE FERRIER). ^[3]

1 × Primary school (élémentaire) (ECOLE ELEMENTAIRE JULES GOHARD). ^[3]

1 × Collège (ECOLE SECONDAIRE PRIVEE IDEE). ^[3]

1 × Library (BIBLIOTHÈQUE MUNICIPALE). ^[3]

2 × Hairdresser (LA COIFFURE PAR MARIE). ^[3,4]

Not counted, because the business register records them as closed: 1 × Restaurant, 2 × Hairdresser.

Not found in the commune: Bakery (boulangerie), Butcher (boucherie), Grocery (épicerie / supérette), Supermarket, Café / bar, GP (médecin généraliste), Pharmacy, Post office / agence postale. ^[3,4]

Market and village life

Market day: unknown — nothing found in the datasets or on the commune website.

Trajectory

Population 1,835 (2012) → 1,847 (2023): 0.7 % over 10 years. ^[5,1]

Population 1,462 (1990) → 1,847 (2023): 26.3 % over 30 years. ^[6,1]

Dwellings (2023): 765, of which 1.2 % second homes and 4.4 % vacant. ^[7]

Access and surroundings

Bakery (Plaisir): 2.5 km to the south-east (straight line). ^[8]

Food shop (Neauphle-le-Château): 2.3 km to the south (straight line). ^[9]

GP (Neauphle-le-Château): 2.1 km to the south (straight line). ^[9]

Pharmacy (Beynes): 2.5 km to the north-west (straight line). ^[10]

Primary school (Saint-Germain-de-la-Grange): 0 km to the north (straight line). ^[11]

Climate

An average of 17 days a year at or above 30 °C and 53 days at or below 0 °C, over 30 complete years in 1995–2024. ^[12]

Measured at the MAULE weather station, 8.8 km away at 33 m; the village itself is at 113 m. ^[12]

The village sits 80 m above the station, so each day's reading was shifted by 5.71 °C per km of altitude before the days were counted. Expect the result to be within about 0.68 °C. ^[12]

Muggy days — a dew point at or above 18 °C — average 1 day a summer. ^[12]

Humidity measured at TRAPPES, 10.5 km away at 167 m, over 30 summers. ^[12]

That station sits 54 m above the village, so each day's humidity was shifted by 4.22 °C per km before the muggy days were counted. ^[12]

An average of 665 mm of rain a year, spread over 117 days — about 5.7 mm on a day it rains. ^[12]

Rainfall measured at AUTOUILLET, 7.1 km away at 126 m. Rainfall is not adjusted for altitude: unlike temperature it has no simple gradient to correct by. ^[12]

Uncertainties

No specific uncertainties flagged.

References

1. INSEE census (RP) 2023 — 78550/2023
2. INSEE density grid 2026
3. INSEE BPE 2025
4. INSEE SIRENE 2026-09
5. INSEE census (RP) 2023 — 78550/2012
6. INSEE census (RP) 2023 — 78550/1990
7. INSEE census (RP) 2023 — 78550/logement/2023
8. INSEE BPE 2025 — 78490
9. INSEE BPE 2025 — 78442
10. INSEE BPE 2025 — 78062
11. INSEE BPE 2025 — 78550
12. Météo-France daily climatology 1995-2024