San Jose is starting today under clear skies and temperatures in the low 60s, but the cool morning is only a brief truce. The Santa Clara Valley is headed for a sunny afternoon near 94 degrees, with a Heat Advisory in effect from 10 AM to 10 PM.
Heat Advisory Runs Through Monday Night
The advisory covers the Santa Clara Valley and eastern Santa Clara Hills, where the National Weather Service says temperatures could range from 95 to 105 degrees. San Jose's point forecast is slightly lower, but the practical advice is the same: hydrate, wear lightweight clothing, move strenuous activities to the morning or evening, and check on people without reliable cooling, according to the National Weather Service.
Temperatures should climb through the morning, reaching the upper 80s around midday and peaking in the low 90s during the afternoon. Winds will start light before turning northwesterly at roughly 5 to 8 mph, while tonight stays clear with a low near 62. Children and pets should never be left in parked cars, where temperatures can become deadly within minutes.
Hot Pattern Relaxes, Then Rebounds
Tomorrow remains sunny and hot with a high near 93, followed by a modest cooldown to about 89 on Wednesday and 90 on Thursday. The heat returns late in the workweek, with highs near 92 on Friday and Saturday, before easing back to around 87 by next Sunday; overnight lows will mostly remain in the low to mid-60s.
The sharpest temperature contrast will be between inland neighborhoods and the coast, where the marine layer should keep conditions considerably cooler. That difference may become more noticeable each afternoon as onshore winds strengthen near the Bay and along the coast.
Dry Conditions Add Fire Concerns
The weather service is also flagging near-critical fire-weather conditions across interior parts of the Bay Area today, citing dry conditions, low humidity and afternoon breezes that can help fires spread. Residents should avoid activities that could create sparks, particularly near hills, grasslands and open space.
