Lille logs 3 hot days a year to Lyon's 31 — Lille wins by 28. Lille also leads on frost days by 26.

Lille runs about $2,363/mo for a balanced lifestyle against Lyon's $2,243/mo — Lyon comes in $120 cheaper each month, roughly 5% less.

On mobility, Lyon scores 3.6 vs Lille's 3.2 (0–5 scale), with the biggest gap on cycling infrastructure.

Lyon's culture score of 3.6 sits well above Lille's 3.4, with the biggest gap on history museums.

Lyon's nature & outdoors score of 3.8 sits well above Lille's 2.8, with the biggest gap on mountain access. Lille still holds an edge on sea access.

Lille's safety score is ~1.4× Lyon's — in the upper band, while Lyon lands in the middle of the scale, with the biggest gap on walking safety.

Lille's career score of 3.4 sits well above Lyon's 3.2, with the biggest gap on startup ecosystem.

Lille's social & community score of 3.0 sits well above Lyon's 2.7, with the biggest gap on expat integration experience.

On food & dining, Lyon scores 3.0 vs Lille's 2.8 (0–5 scale), with the biggest gap on vegan & vegetarian options.

On family, Lyon scores 3.1 vs Lille's 2.7 (0–5 scale), with the biggest gap on yoga studios. Lille still holds an edge on universities.

On healthcare, Lille scores 3.7 vs Lyon's 3.0 (0–5 scale), with the biggest gap on public healthcare quality.

Lille averages 9.5 µg/m³ (good) PM2.5 annually versus Lyon's 10.6 µg/m³ (moderate) — Lille breathes ~10% cleaner air (1.1 µg/m³ lower).

Who Thrives Here