🇺🇸 Fresno vs 🇺🇸 San Francisco

Fresno in the Central Valley is one of California's hottest and most air-polluted cities. Surrounded by the Sierra Nevada to the east and the Coast Ranges to the west, the valley traps both heat and smog. Summer temperatures regularly exceed 105°F and winter tule fog can persist for weeks blocking sunlight.

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.