Paris logs 9 hot days a year to Rennes's 4 — Rennes wins by 5. Rennes also leads on frost days by 9.

Paris runs about $2,953/mo for a balanced lifestyle against Rennes's $2,136/mo — Rennes comes in $817 cheaper each month, roughly 38% less.

On mobility, Paris scores 4.6 vs Rennes's 3.6 (0–5 scale), with the biggest gap on flight connectivity. Rennes still holds an edge on car efficiency.

Paris's culture score of 4.7 sits well above Rennes's 3.6, with the biggest gap on arts & culture.

Paris's nature & outdoors score of 4.7 sits well above Rennes's 3.8, with the biggest gap on rock climbing. Rennes still holds an edge on sea access.

Rennes's safety score is ~1.8× Paris's — in the upper band, while Paris lands below average, with the biggest gap on road safety.

Paris's career score of 4.9 sits well above Rennes's 3.4, with the biggest gap on career opportunities.

Paris's social & community score of 3.1 sits well above Rennes's 2.7, with the biggest gap on expat-first community. Rennes still holds an edge on local-first community.

On food & dining, Paris scores 4.2 vs Rennes's 3.2 (0–5 scale), with the biggest gap on restaurant variety.

On family, Paris scores 4.1 vs Rennes's 3.1 (0–5 scale), with the biggest gap on international schools.

On healthcare, Paris scores 3.7 vs Rennes's 3.0 (0–5 scale), with the biggest gap on private healthcare quality.

Paris averages 10.1 µg/m³ (moderate) PM2.5 annually versus Rennes's 8.3 µg/m³ (good) — Rennes breathes ~17% cleaner air (1.8 µg/m³ lower).

Who Thrives Here