🇺🇸 Mesa vs 🇺🇸 San Francisco

Mesa is Arizona's third-largest city and part of the Phoenix metro heat bubble. Its eastern valley position has historically had more agricultural land which slightly buffered the heat island, but rapid development has erased much of that moderating influence. Monsoon thunderstorms from the southeast approach Mesa first in the valley.

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.