Chicago logs 198 sunny days a year to San Diego's 309 — San Diego wins by 111. San Diego also leads on outdoor-dinner months by 2.

Chicago runs about $3,665/mo for a balanced lifestyle against San Diego's $4,493/mo — Chicago comes in $828 cheaper each month, roughly 23% less.

On mobility, Chicago scores 3.4 vs San Diego's 2.4 (0–5 scale), with the biggest gap on public transit. San Diego still holds an edge on motorbike/scooter efficiency.

Chicago's culture score of 4.4 sits well above San Diego's 3.5, with the biggest gap on history museums.

San Diego's nature & outdoors score of 4.5 sits well above Chicago's 3.5, with the biggest gap on sea access.

San Diego's safety score is ~1.3× Chicago's — in the middle of the scale, while Chicago lands in the middle of the scale, with the biggest gap on walking safety. Chicago still holds an edge on wildfire safety.

Chicago's career score of 4.7 sits well above San Diego's 4.0, with the biggest gap on career opportunities.

Chicago's social & community score of 4.0 sits well above San Diego's 3.6, with the biggest gap on expat integration experience. San Diego still holds an edge on street atmosphere.

On food & dining, Chicago scores 4.6 vs San Diego's 3.8 (0–5 scale), with the biggest gap on restaurant variety.

On family, Chicago scores 4.0 vs San Diego's 3.6 (0–5 scale), with the biggest gap on international schools. San Diego still holds an edge on yoga studios.

On healthcare, Chicago scores 2.8 vs San Diego's 2.1 (0–5 scale), with the biggest gap on private healthcare quality.

Chicago averages 8.5 µg/m³ (good) PM2.5 annually versus San Diego's 9.2 µg/m³ (good) — Chicago breathes ~7% cleaner air (0.6 µg/m³ lower).

Who Thrives Here