Every forecast across Silicon Valley, highway-clear.
Official National Weather Service forecasts for San Jose and Silicon Valley — Santa Clara and San Benito counties, from Palo Alto and Mountain View down the valley through Campbell and Morgan Hill to Gilroy and Hollister.
Every California region shares one system — the same maps, the same live radar, the same climate record. The South Bay sits in the rain shadow of the Santa Cruz Mountains and gets about half the rain San Francisco does, which is why it is the warmest, driest and sunniest corner of the Bay. The same ridge that blocks the fog holds the fire risk, and the Calaveras and San Andreas both run through these hills.