San Jose’s Halloween forecast points to a jacket-worthy afternoon. Saturday, October 31, should reach about 66 degrees before temperatures ease back later in the day. Most trick-or-treating hours look dry, though rain may make a late-night appearance.
The National Weather Service forecast calls for fog before 9 a.m., mostly sunny skies and light west-northwest winds. Afternoon temperatures should slip toward the mid-60s, making a coat or sweater a more practical costume accessory than anyone might have hoped.
Rain Waits Until After Halloween Plans
The best chance for showers arrives between 10 p.m. Saturday, October 31, and 4 a.m. Sunday, November 1. Forecasters put the chance of precipitation around 40%, so San Jose is not facing a washout, but late-night outdoor plans could run into damp pavement and a passing shower.
Sunny Sunday Brings A Brief Rebound
Sunday should turn sunny with a high near 66 degrees and northwest winds of 2 to 8 mph. Overnight temperatures will fall to about 43 degrees under mostly clear skies, so early Sunday plans may feel distinctly colder than Halloween afternoon.
Monday brings dry weather and slightly warmer temperatures after Sunday night. Another round of patchy morning fog is possible Tuesday, when the high should reach about 68 degrees.
Shoreline Flooding Remains A Separate Concern
San Jose is inland, but the broader Bay Area remains under a coastal flood concern around high tides. Minor flooding is possible along vulnerable Bayshore locations through Sunday evening, while the Pacific Coast advisory is set to end Saturday evening.
Anyone heading toward low-lying waterfront roads, paths or parking areas should keep an eye on conditions around high tide. The shoreline advisory does not signal a comparable flooding threat for most of inland San Jose.
More Mild Weather Into Next Week
Wednesday is forecast near 69 degrees and mostly sunny, while Thursday is expected to be mostly cloudy near 70 degrees. Rain chances return to the broader region from Monday night into Wednesday, but the forecast currently points to light, unsettled weather rather than a major storm.
