San Jose woke up under a blanket of low clouds and patchy fog today, with early-morning temperatures in the mid-50s. The marine layer is expected to thin out through late morning, and most inland neighborhoods should warm into the upper 70s this afternoon, while the shoreline holds onto that cooler coastal feel.
Morning Fog, Sunny Afternoons
Patchy fog is likely to linger along low-lying streets and near the bay through about 8 AM, then gradually clear to mostly sunny skies. Inland highs are forecast to top out near 78°F, with northwest winds generally between 2 and 8 mph and a slight dip back toward the mid 70s in a few spots later this afternoon.
Monday Heat Risk
Forecasters expect the warmest day to be tomorrow, when San Jose-area highs could climb to about 89°F and far interior valleys may push into the 90s, creating a moderate risk for heat-related illness among sensitive groups. According to the NWS San Francisco, the spike in temperatures should be brief, with a cooling trend returning by midweek as a Pacific low approaches.
Commute, Airport And Boating
Morning fog and low clouds could knock down visibility and slow the early commute, especially on lower-lying roadways, with ceilings improving by late morning. Drivers heading to and from the airport may notice the murk as well, even if major disruptions are not expected. Small Craft Advisories are posted at times for parts of Monterey Bay and some nearshore waters today and into Monday, so boaters should plan for choppy conditions and keep an eye on local marine notices.
How To Stay Cool
If you or someone you know is sensitive to heat, plan ahead for tomorrow by staying hydrated, avoiding strenuous outdoor activity during the hottest afternoon hours, and identifying a nearby air-conditioned place to cool off. The County shares guidance and cooling-center information during hot spells, and the Santa Clara County OEM lists locations and tips.
Bottom line: expect foggy, cooler starts and mostly sunny afternoons through Tuesday, with a short but noticeable warm surge tomorrow. A light jacket will help in the mornings, and water will be your best friend once those inland temperatures start climbing.
