Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Fall Foliage Forecast: See where vibrant colors are expected in autumn. Chevron right
Catastrophic flash flood sweeps through Nepal. Click for the latest. Chevron right

Portola Valley, CA

61°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Portola Valley

California

61°
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
Portola 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

Unlock extended 90-day forecasts

Activate Your Premium+ Subscription

Chevron right

August 27 - September 10

Thu 8/27

83° /59°
0%
Areas of low clouds, then sun and nice

RealFeel®86°

RealFeel Shade™80°

Max UV Index7.0 (High)

WindWNW 8 mph

Fri 8/28

75° /56°
1%
Areas of low clouds, then some sun and cool

RealFeel®80°

RealFeel Shade™72°

Max UV Index7.0 (High)

WindW 8 mph

Sat 8/29

71° /55°
0%
Areas of low clouds early; otherwise, mostly sunny and cool

RealFeel®75°

RealFeel Shade™68°

Max UV Index7.0 (High)

WindW 10 mph

Sun 8/30

73° /52°
2%
Areas of low clouds early; otherwise, mostly sunny and cool

RealFeel®77°

RealFeel Shade™69°

Max UV Index7.0 (High)

WindWSW 9 mph

Mon 8/31

83° /53°
4%
Beautiful with sunshine filtered by passing clouds

RealFeel®83°

RealFeel Shade™80°

Max UV Index4.0 (Moderate)

WindWSW 9 mph

Tue 9/1

84° /53°
4%
Nice with times of clouds and sun

RealFeel®88°

RealFeel Shade™81°

Max UV Index7.0 (High)

WindW 8 mph

Wed 9/2

85° /52°
0%
Brilliant sunshine

RealFeel®86°

RealFeel Shade™83°

Max UV Index7.0 (High)

WindW 4 mph

Thu 9/3

88° /54°
0%
Sunshine and a few clouds

RealFeel®89°

RealFeel Shade™86°

Max UV Index7.0 (High)

WindWSW 5 mph

Fri 9/4

89° /53°
0%
Sunny

RealFeel®92°

RealFeel Shade™87°

Max UV Index7.0 (High)

WindNNW 4 mph

Sat 9/5

88° /54°
0%
Sunshine and a few clouds

RealFeel®91°

RealFeel Shade™87°

Max UV Index7.0 (High)

WindSSW 5 mph

Sun 9/6

85° /54°
0%
Intervals of bright sunshine

RealFeel®85°

RealFeel Shade™84°

Max UV Index5.0 (Moderate)

WindSW 5 mph

Mon 9/7

88° /52°
0%
Mostly sunny

RealFeel®88°

RealFeel Shade™85°

Max UV Index7.0 (High)

WindWNW 5 mph

Tue 9/8

87° /53°
2%
Partly sunny

RealFeel®89°

RealFeel Shade™85°

Max UV Index7.0 (High)

WindNW 5 mph

Wed 9/9

86° /51°
25%
Cloudy

RealFeel®86°

RealFeel Shade™86°

Max UV Index2.0 (Low)

WindNW 5 mph

Thu 9/10

84° /55°
25%
Cloudy

RealFeel®83°

RealFeel Shade™83°

Max UV Index2.0 (Low)

WindNW 5 mph

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Fall foliage forecast 2026: Where to expect the best color in the US

22 hours ago

Severe Weather

Hundreds missing after massive flood wave on China-Nepal border

13 hours ago

Hurricane

Could a tropical wave beat the odds and become 'Dolly?'

1 hour ago

Weather Forecasts

Los Angeles heat wave may extend to last weekend of August

1 hour ago

Climate

Global ocean heat breaks record months after its usual peak

20 hours ago

 More Stories

Featured Stories

Weather News

Ross Fire doubles to 80,000 acres, destroys structures

17 hours ago

Astronomy

Best lunar eclipse for the US until 2029 arrives Thursday night

14 hours ago

Astronomy

NASA’s Roman Space Telescope set to launch Sunday

15 hours ago

Weather News

Heavy rains hit vulnerable communities after Venezuela earthquakes

19 hours ago

Weather News

Salmonella cases from jalapeno peppers reach 431 across 32 states

5 days ago
World North America United States California Portola Valley

Weather Near Portola 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

...

...

...