🇺🇸 San Francisco vs 🇺🇸 San Jose

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.

San Jose at the southern end of San Francisco Bay has a warm Mediterranean climate that is sunnier and warmer than the coast. The mountains to the east and west create a valley setting that warms significantly in summer. The Bay moderates extremes but San Jose sees more heat days than San Francisco and less coastal fog.