10-Day Weather Forecast for Castro Valley, California 94546 - The Weather Channel | weather.com

Today Hourly 10 Day Monthly Allergies Air Quality Cold & Flu

Advertisement

Daily ForecastCastro Valley, California 94546· as of 6:25 AM UTC

Advertisement

Trending Now

Severe Thunderstorms, Including Some Tornadoes, Are Likely In The Plains, Midwest Through Saturday

Two Winter Storms Will Bring Snow, Ice To Northern US

Why The Midwest Got Slammed With Severe Weather This March

Spring Warmth Or Lingering Winter? Here's What April Will Feel Like

Advertisement

Advertisement

Home & Garden

Don’t Make These Mistakes When Planting Your Spring Garden

0:35

When To Worry About Mold Growing In Your Home

0:38

Get Ahead For Spring With Essential Winter Garden Tips

0:30

Why Your Home's Air Might Be More Polluted Than Outdoors

1:04

On The Move

And The Best State For An Adventure Vacation Is ...

0:42

California Wildflower Superblooms Are Back In 2026

0:43

3 Big Changes Coming To National Parks In 2026

0:42

‘Rare And Remarkable’: Lake Superior Ice Caves Reopen

0:30

Advertisement

Spring Is Here

When Are The Average Last Freezes In The US?

0:50

Record Warmth Is Almost Tripling Record Cold This Year

1:07

Study: Winters Less Snowy, Shortening Across N. Hemisphere

0:47

Allergy Season Grows Longer – Especially In These Places

0:36

We Love Critters

Arena-Pethelpful

Tiny Maltipoo's Zoomies Turn Living Room Into a Toy Tornado and It's Too Cute

Arena-Pethelpful

Tiny Otter Family Making Hay Beds Together Shows That Teamwork Really Makes the Dream Work

Arena-Pethelpful

Big Bear Bald Eagle Protecting Their Eggs During Windstorm Is the Most Inspiring Hero

Arena-Pethelpful

Dog Gives Dad the Cold Shoulder After Making Him Wear a Rain Coat, and We’re Cracking Up

Advertisement

Advertisement

Advertisement

Loading air quality data...

Advertisement

Editor's Pick

See Artemis II Launch From Plane

Tens of thousands watched the historic liftoff of the Artemis II crew from the ground, but some lucky people got an incredible view from their seats on a plane. See the video shared by one passenger on a Delta flight from Aruba to Atlanta.

0:35

Advertisement

Sun & Moon

Artemis II Crew Leaves Earth’s Orbit; Here’s What’s Next

0:45

Stay Safe

Falling Trees May Be One Of America's Most Underrated Weather Dangers

Product Reviews & Deals

12 Travel Essentials To Stash In Your Carry-On (No Matter The Destination)

Advertisement

Advertisement