🇺🇸 San Francisco vs 🇺🇸 Tempe

San Francisco's climate is shaped by its position on a peninsula surrounded by the Pacific Ocean and San Francisco Bay. The coastal fog (Karl the Fog) rolls in through the Golden Gate each summer afternoon, keeping temperatures mild year-round. The city has dramatically different microclimates — the Sunset District fog-bound while the Mission basks in sun on the same day.

Tempe is Arizona State University's home city, sandwiched between Phoenix and Mesa in the heart of the Salt River Valley. Tempe Town Lake provides a rare water body that generates evaporative cooling and pleasant lakeside breezes. The dense urban core around ASU creates intense heat island conditions.