Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
World Cup may have 'lengthy' weather delays Thursday. Click for the latest news, photos. Chevron right
Massive heat dome to expand into next week. See how hot it will get. Chevron right

Castro Valley, CA

56°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Castro Valley

California

56°
No results found.
Try searching for a city, zip code or point of interest.
Get Premium+
Create Your Account Unlock extended daily and hourly forecasts — all with your free account.
Let's Go Chevron right
Have an account already? Log In
settings
Help
Castro Valley, CA Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps
News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel
For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center
Today Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities
Thursday, July 9

Day

7/9
74°Hi
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
RealFeel Shade™ 72°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Partly sunny

Max UV Index8.0 (Very High)

WindSW 5 mph

Wind Gusts9 mph

Probability of Precipitation20%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover47%

Morning

Afternoon

Night

7/9
57°Lo
RealFeel® 55°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
A crystal-clear sky

WindSW 7 mph

Wind Gusts14 mph

Probability of Precipitation10%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover6%

Evening

Overnight

Sun & Moon

14 hrs 37 mins
Rise 5:55 AM
Set 8:32 PM
Waning Crescent
Rise 1:13 AM
Set 3:52 PM

Temperature History

7/9
High
Low
Forecast
74°
57°
Average
75°
57°
Last Year
68°
56°

Further Ahead

Hourly

10-Day

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather News

Venezuela death toll rises after back-to-back earthquakes

10 hours ago

Weather News

France has hottest day ever recorded as Europe heat wave intensifies

15 hours ago

Severe Weather

Severe storms to precede, accompany heat surge in central and east US

4 hours ago
Live Blog

Live: World Cup 2026 weather updates

LATEST ENTRY

World Cup players hold moment of silence for Venezuela earthquake victims

10 hours ago

Weather Forecasts

'Extreme' weather could fuel erratic wildfires in western US

11 hours ago

 More Stories

Featured Stories

Recreation

Snake hunters compete for $25,000 wrangling pythons in Florida

16 hours ago

Weather News

Utah wildfires force evacuations as crews work in hot, windy weather

11 hours ago

Severe Weather

Storm knocks down tree, exposes 100-year old hidden gravestone

2 days ago

Astronomy

NASA kicks World Cup excitement into orbit with soccer ball study

2 days ago

Rescuers search through rubble after destructive earthquakes in Venezu...

1 day ago 0:44
World North America United States California Castro Valley

Weather Near Castro Valley:

  • Oakland, CA
  • San Francisco, CA
  • San Jose, CA
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...