San Jose is starting Wednesday clear and around 48 degrees, but patchy fog could briefly slow the morning before sunshine takes over. The city should reach near 69 degrees this afternoon, with no rain expected and only light winds.
Fog Before A Mostly Sunny Afternoon
Patchy fog is expected before 9 a.m. Wednesday, then skies should turn mostly sunny through the afternoon. Gloomy and cloudy conditions will continue into Friday. West-northwest winds will stay light, generally running from 2 to 8 mph, while temperatures peak around 69 degrees between midafternoon and late afternoon.
Wednesday night will be mostly cloudy, with temperatures dropping to about 47 degrees. Thursday stays dry and mild, reaching near 70 degrees under mostly cloudy skies.
Halloween Weekend Turns Cooler
Halloween on Saturday looks noticeably cooler, with mostly cloudy skies and a high around 64 degrees, according to National Weather Service.
What the temperature benchmark can tell us
The climate summary lists a normal maximum of 73°F for San Jose Airport, but that figure is not identified as an October 31 normal; it therefore cannot show how unusual Saturday’s forecast high near 64°F would be, according to the National Weather Service.
What the climate figures put in context
The same NWS climate summary puts Wednesday’s forecast high near 69°F slightly below the 73°F normal maximum and lists month-to-date precipitation at 0.17 inches, compared with a normal of 0.43 inches. Those figures do not show how common fall fog is or what conditions produce it in the Santa Clara Valley, when the rainy season typically begins, or how October precipitation compares with winter months. They also do not determine whether rain will fall Tuesday.
Anyone making evening plans should expect a jacket-worthy chill, even if the afternoon remains comfortable.
Light Rain Chance Arrives Next Week
Tuesday is forecast to reach about 71 degrees, with rain chances in the forecast for early to mid-next week, though timing remains uncertain, so the next meaningful weather wrinkle may arrive after the weekend.
Coastal Flooding Remains A Shoreline Concern
The broader National Weather Service discussion continues to flag coastal flooding concerns around Bayshore locations and the Pacific Coast during high tides through the week, as reported by National Weather Service. That is a shoreline issue rather than an inland San Jose alert, but people heading toward low-lying waterfront areas should stay aware of changing conditions.
