Winds of Change: San Francisco Swaps Morning Mist for Sunny Gales

A Tale of Two Cities: Damp Dawn, Radiant Day

San Francisco residents waking up this Wednesday, March 4, 2026, will experience a classic Bay Area "weather whiplash." The region is currently transitioning away from a damp, humid spell into a much drier, albeit windier, pattern. While the early hours may feel like a continuation of the recent gloom, the afternoon promises a significant shift in conditions that will scour the skies clear by sunset. This change is driven by a building high-pressure system that is effectively pushing moisture out of the peninsula and ushering in a brisk, northerly flow.

Morning: A Lingering Chill and Damp Start

The morning hours will be dominated by a stubborn layer of marine clouds and patchy fog, which will be particularly slow to lift along the Pacific Coast and within the western neighborhoods. Meteorological data suggests a lingering 10% chance of light showers or drizzle during the morning commute, especially for the North Bay and the coastal hills. Temperatures will start in the low 50s, settling around 52°F during the early hours. Humidity remains exceptionally high—peaking near 89%—making the air feel colder than the thermometer suggests. Commuters should prepare for damp pavement and reduced visibility through at least 10:00 AM.

Afternoon: The Sun Takes Charge

By midday, the transition to a stabilizing pattern will be in full swing. Clouds are expected to break significantly between 12:00 PM and 2:00 PM, yielding to bright, sunny skies across most of the city, particularly east of Twin Peaks and along the Embarcadero. High temperatures will reach a seasonal peak of approximately 60°F to 62°F. However, the sunshine comes with a caveat: the wind. Northwest winds will pick up speed throughout the afternoon, sustained at 10 to 20 mph. These winds will begin the process of "drying out" the city, causing dew points to plummet and humidity to fall sharply compared to the morning hours.

Evening and Night: Clear Skies and High Gusts

As the sun sets, the wind will become the primary weather story for San Franciscans. Northwest gusts are predicted to reach between 35 and 40 mph, with even stronger bursts possible in wind-prone areas and higher elevations. While skies will remain clear and provide excellent visibility, the wind chill will make for a very brisk evening. Overnight, temperatures will dip into the upper 40s, with a projected low of 49°F. Residents are advised to secure loose outdoor items and be cautious of small debris on the roads during the windiest periods of the night.

Daily Weather Summary

• High/Low Temperature: 62°F / 49°F
• Sky Conditions: Morning fog and drizzle followed by full afternoon sun.
• Wind Forecast: Northwest winds 15-20 mph; gusts reaching 40 mph.
• Rain Probability: 10% chance in the morning; 0% chance for the remainder of the day.
• Humidity: Dropping from 89% in the morning to roughly 40% by late evening.