Honestly, people think California is just endless summer, but if you’re looking at the san jose 10 day weather forecast right now, you know that’s a total myth. We’re in that weird mid-January stretch where the Santa Clara Valley can’t decide if it wants to be a refrigerator or a tanning salon.
It's 2026, and the patterns are shifting just enough to keep us guessing.
Right now, as of Friday night, January 16, it’s actually pretty crisp out there. We’re sitting at a cool 52°F with barely a breeze coming from the west. If you’re heading out to Santana Row or just walking the dog, you’ve probably noticed that dampness in the air—humidity is hanging around 79%. It’s that classic "Bay Area cold" that bites a little harder than the thermometer suggests.
The Immediate Outlook: Sun vs. Shivers
Tomorrow, Saturday, January 17, is going to be a bit of a gray sandwich. We’re looking at a high of 68°F, but don't let that fool you into thinking it's t-shirt weather all day. It’s going to stay cloudy pretty much from sunrise at 7:19 am until the sun goes down around 5:15 pm.
The low will hit 45°F.
👉 See also: Sport watch water resist explained: why 50 meters doesn't mean you can dive
Basically, it's a "layers day."
One thing most people get wrong about San Jose in January is forgetting the rain shadow effect. Because we’re tucked behind the Santa Cruz Mountains, a lot of the heavy stuff misses us. For the next week, the chance of precipitation is hovering at a tiny 10% or less most days. It’s dry. Kinda dusty, actually.
Mid-Week Reality Check
By the time Monday, January 19 rolls around—Martin Luther King Jr. Day—the clouds are supposed to clear out. We’re looking at a bright, sunny high of 66°F. It’s going to be gorgeous for a hike at Alum Rock Park, but the nighttime lows are staying stubborn. Expect to wake up to 46°F.
Here’s the breakdown for the week ahead:
✨ Don't miss: Pink White Nail Studio Secrets and Why Your Manicure Isn't Lasting
- Tuesday, Jan 20: Sunny, high 64°F / low 46°F.
- Wednesday, Jan 21: Partly sunny, high 63°F / low 47°F.
- Thursday, Jan 22: Mostly cloudy with some sun peeking through, high 63°F / low 45°F.
It’s a very consistent, "moderately chilly" vibe.
The National Weather Service notes that our Mediterranean climate means we usually get 82% of our rain between November and March, but this specific 10-day window is looking surprisingly parched. We’re seeing a persistent offshore flow, which keeps things mild during the day but lets all that heat escape the moment the sun drops behind the hills.
Planning Your Next 10 Days
If you’re trying to plan your life around the san jose 10 day weather forecast, focus on the tail end of next week. Friday, Jan 23 and Saturday, Jan 24 are going to see a slight dip. We’re talking highs of 60°F to 61°F.
It's not freezing, but it's enough of a change that you'll want the heavier coat if you're out late.
🔗 Read more: Hairstyles for women over 50 with round faces: What your stylist isn't telling you
The UV index is staying low—around a 2—so you won't fry, but the air quality can get a bit stagnant in the valley when the wind dies down like this. We’re seeing speeds of only 2 to 4 mph for most of the week.
What to Actually Wear
Forget the heavy parkas. You’re not in Tahoe.
Honestly, the "San Jose Uniform" is the only way to survive this 10-day stretch. You need a light puffer or a decent fleece for the morning, something you can strip off by 2:00 pm when it hits 68°F, and then put right back on the second you leave the office.
Actionable steps for the week:
- Check your tire pressure: These 20-degree swings between day and night (68°F to 45°F) can trigger your TPMS light.
- Water the yard: Since the rain chance is basically zero for the next week, your "drought-tolerant" plants might actually be thirsty.
- Morning commute: Expect some patchy fog mid-week around Wednesday and Thursday; visibility might get wonky near the 880/101 interchange.
The forecast is looking stable, if a little boring. No major storms are lining up to soak us just yet, so enjoy the dry pavement while it lasts.