🇺🇸 Pittsburgh vs 🇺🇸 San Francisco

Pittsburgh at the confluence of three rivers has a full humid continental climate shaped dramatically by its river valley topography. The city's steep hills and three rivers (Ohio, Monongahela, Allegheny) create dozens of distinct microclimates between hilltop neighborhoods and valley bottoms. Fog and overcast skies are common and the city historically had severe air pollution (now dramatically improved).

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.