Saint-Guillaume

Identity

Saint-Guillaume (INSEE 38391) is in Isère (38), part of CC du Trièves. Population 238 (2023). ^[1]

INSEE density class: Rural à habitat dispersé (level 6). ^[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/38391-saint-guillaume

Vitality score

Vitality score 27.9/100 — Few services (model fr-v0.2).

Confidence: high.

Better served than 79 % of the 16,971 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 (LE RELAIS DE TOUCHANE). ^[3,4]

1 × Primary school (élémentaire) (ECOLE PRIMAIRE PUBLIQUE). ^[3]

1 × Post office / agence postale (SAINT GUILLAUME AP). ^[3]

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

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

Market and village life

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

Trajectory

Population 283 (2012) → 238 (2023): -15.9 % over 10 years. ^[5,1]

Population 235 (1990) → 238 (2023): 1.3 % over 30 years. ^[6,1]

Dwellings (2023): 161, of which 22.4 % second homes and 10.6 % vacant. ^[7]

Access and surroundings

Bakery (Saint-Andéol): 3.1 km to the west (straight line). ^[8]

Food shop (Saint-Andéol): 2.2 km to the west (straight line). ^[8]

GP (Monestier-de-Clermont): 5.3 km to the south-east (straight line). ^[9]

Pharmacy (Monestier-de-Clermont): 5.3 km to the south-east (straight line). ^[9]

Primary school (Saint-Guillaume): 0 km to the south (straight line). ^[10]

Climate

An average of 15 days a year at or above 30 °C and 74 days at or below 0 °C, over 28 complete years in 1995–2024. ^[11]

Measured at the MONESTIER weather station, 5.3 km away at 806 m; the village itself is at 689 m. ^[11]

The village sits 117 m below the station, so each day's reading was shifted by 6.06 °C per km of altitude before the days were counted. Expect the result to be within about 0.68 °C. ^[11]

Muggy days — a dew point at or above 18 °C — average 0 days a summer. ^[11]

Humidity measured at LE GUA-NIVOSE, 6.6 km away at 1,646 m, over 20 summers. ^[11]

That station sits 957 m above the village, so each day's humidity was shifted by 3.69 °C per km before the muggy days were counted. ^[11]

An average of 1,044 mm of rain a year, spread over 109 days — about 9.6 mm on a day it rains. ^[11]

Rainfall measured at MONESTIER, 5.3 km away at 806 m. Rainfall is not adjusted for altitude: unlike temperature it has no simple gradient to correct by. ^[11]

Uncertainties

No specific uncertainties flagged.

References

1. INSEE census (RP) 2023 — 38391/2023
2. INSEE density grid 2026
3. INSEE BPE 2025
4. INSEE SIRENE 2026-09
5. INSEE census (RP) 2023 — 38391/2012
6. INSEE census (RP) 2023 — 38391/1990
7. INSEE census (RP) 2023 — 38391/logement/2023
8. INSEE BPE 2025 — 38355
9. INSEE BPE 2025 — 38242
10. INSEE BPE 2025 — 38391
11. Météo-France daily climatology 1995-2024