Mild Bay Area climate. Dry heat. Inland location can get warmer than coastal SF. FAA restrictions prevent roof construction.
Generally comfortable. Occasional heat waves possible. West side of stadium bakes in afternoon sun.
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Santa Clara (San Francisco Bay), USA | Capacity: 70,000 | Open-air
Source: Esh et al. 2026, "Evidence-Based Guidelines to Protect Player Health and Performance from Environmental Challenges", Sports Medicine (DOI: 10.1007/s40279-026-02398-4)