San Jose is trading in the light-jacket mornings for T-shirt afternoons this week, with clear skies today and a quick warmup to around 77°F by midafternoon. Nights will stay on the mild side in the mid 40s, and rain looks like a no-show through the weekend.
Today and the Next Few Days
Plenty of sunshine and gentle west-northwest breezes will lift inland highs into the upper 70s today and tomorrow, while coastal spots hang onto cooler air. San Jose International Airport could even flirt with a March record tomorrow, with a forecast high near 81°F. Forecasters are calling for a widespread minor heat risk through Saturday, though evenings and overnights should feel comfortable in the mid 40s.
Winds will stay on the tame side inland, generally running 2-7 mph, according to the National Weather Service.
Weekend Into Next Week
A strengthening ridge of high pressure will crank the thermostat a little higher over the weekend. Inland highs are expected to hit the mid 80s by Sunday, then climb into the low 90s on Monday and Tuesday. That setup brings pockets of moderate heat risk to Valley locations away from the coast, so outdoor work and workouts are better scheduled for the morning or evening.
If you or someone you look after does not have air conditioning, this is the time to think ahead about a cooler spot to ride out the hottest part of the day.
How To Stay Cool
Basic heat-playbook rules apply: drink plenty of water, ease up on strenuous outdoor activity during peak afternoon hours, and use fans or open windows at night to pull in cooler air. Santa Clara County and several local libraries open cooling centers during heat events. For locations and detailed tips, check county heat-safety resources from the Santa Clara County Office of Emergency Management.
It is also a good moment to check in on neighbors who might be more vulnerable to heat and to make a simple backup plan in case power or cooling becomes an issue.
On The Water And The Road
Out on the coast, expect breezy and choppy conditions, with Small Craft Advisories at times, so recreational boaters should take a look at the latest marine forecast before heading out. Inland, commuters and cyclists could run into gustier pockets on bridges and hilltops in the afternoon. It is a smart idea to secure lightweight outdoor furniture and save longer errands for the cooler morning or evening hours.
