Bay Area/ San Francisco

Bay Area Braces for Cold Snap and Heavy Rainfall as New Week Promises Stormy Weather

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Published on October 12, 2025
Bay Area Braces for Cold Snap and Heavy Rainfall as New Week Promises Stormy WeatherSource: Tobias Kleinlercher / Wikipedia, CC BY-SA 3.0, via Wikimedia Commons

Bay Area residents should brace themselves for a significant cold snap and a robust rainstorm set to make landfall beginning Monday and persisting into Tuesday. According to the National Weather Service in San Francisco, the region is gearing up for a cold, windy Sunday followed by widespread rainfall and potential thunderstorms as the new week starts. This weather disruption comes with a swift change from the recent drying trend, and locals are advised to prepare their surroundings for the expected conditions.

Mondays and Tuesdays look soaked, with initial reports predicting 1.00" of rainfall across most of the area and local accumulations, peaking at 1.50"-2.50" in the higher terrain. The incoming low-pressure system is also poised to challenge daily minimum temperature records, with near-freezing conditions forecast for Monterey and San Benito counties by Tuesday night. As the cold set in, "conditions will feel colder than what the thermometer reads," the NWS San Francisco warning indicates.

Beyond the cold, the NWS San Francisco also highlights a "marginal risk (at least 5%) of rainfall exceeding flash flood guidance," which implies that while widespread flooding isn't anticipated, local flash floods are a realistic concern for areas prone to rapid runoff. Moreover, the threat of clustered thunderstorms looms over Monday and Tuesday, with potential lightning and flooding as additional risks to consider.

Mariners aren't exempt from this weather pattern's reach either. "Gusty northerly winds will continue across the waters today ahead of a strengthening storm system arriving from the north Monday into Tuesday," the NWS San Francisco states, warning of hazardous conditions at sea. Gale-force winds will pick up considerably later today and into the evening before subsiding by midweek.