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Delta Breeze and Marine Layer Bring Cooler Weekend to Northern California

An onshore system early next week may deepen the cooldown with light showers over higher terrain.

Overview

  • Coastal 60s, bayside 70s, and inland mid to upper 80s are forecast this weekend under a reinforced Delta breeze.
  • Morning fog and low clouds dominate with a chance of coastal drizzle, then inland clearing by midday while beaches often stay gray.
  • Air quality has generally improved, though hazy or smoky mornings may linger in the Foothills and Tahoe with pockets of moderate to unhealthy-for-sensitive-groups in Tuolumne and Mariposa counties.
  • Another trough is projected to arrive early next week, pushing Valley highs toward the low 80s by midweek and bringing the best shower chances to far Northern California, the Foothills, and the Sierra from Tuesday to Thursday.
  • Fire weather remains critical across the Pacific Northwest with dry lightning highlighted Friday, and while thick smoke concentrates there, Yosemite and Lake Tahoe could see intermittent haze.