San Jose’s skies are clear and the thermometer is hanging near 55°F at Mineta San Jose International Airport this midafternoon, but the real warmth is stacking up inland. Today is set to be the hottest day in the current stretch, with highs in the upper 70s across much of the Santa Clara Valley while coastal spots stay noticeably cooler.
Afternoon Heat And Record Watch
Forecasters expect San Jose to top out near 78°F this afternoon, just one degree shy of the city’s record today of 79°F. That will make this the clear peak of the warm spell and put temperatures well above normal for late February. The National Weather Service advises staying hydrated, limiting time in direct sun during the warmest hours, and using fans or opening windows overnight to help cool buildings.
Foggy Mornings, Sunny Afternoons
Before about 8 AM, patchy fog is likely in low-lying neighborhoods and along bay approaches, followed by a return to partly to mostly sunny afternoons. Overnight clouds are expected, and pockets of patchy fog could redevelop after 1 AM Sunday and again overnight into Monday. Early drivers should be ready for reduced visibility. A brief cooling trend is on tap Sunday into Monday with only a slight chance of light rain, mainly north of the South Bay.
What This Means For Your Plans
If you are planning midday outdoor activities, bring water and try to stake out shaded spots, since inland neighborhoods will feel distinctly warmer than the immediate coast. Morning commuters should slow down where fog thickens, especially on bridges and bay approaches, and leave extra stopping distance.
