• Tonight

    Apr 17

    Lo 52°

    Increasing clouds

    Dust & Dander Weather
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Fri

    Apr 18

    69°Lo 49°

    Partly sunny

    Low indoor dust & dander levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Sat

    Apr 19

    66°Lo 49°

    Mostly sunny

    Low indoor dust & dander levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
  • Sun

    Apr 20

    72°Lo 51°

    Partly sunny and pleasant

    Low indoor dust & dander levels
    • Precip
      1%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      26%
    more
  • Mon

    Apr 21

    68°Lo 54°

    Partly sunny and cool

    Low indoor dust & dander levels
    • Precip
      13%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      70%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sat
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Partly Cloudy
Partly Sunny
Mostly Sunny
Sunny
Sunny
Sunny
Sunny
Sunny
Temp (°F) 55° 57° 60° 63° 64° 65° 66° 65°
RealFeel® 58° 63° 67° 69° 69° 69° 68° 65°
Humidity 75% 69% 63% 58% 54% 51% 50% 50%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 4 NW 5 NW 5 NW 7 NW 9 NW 10 NW 10 NW 10 NW
UV Index 2 4 6 7 8 7 6 4
Cloud Cover 66% 35% 10% 0% 0% 0% 1% 1%
Dew Point 48° 47° 47° 48° 48° 47° 47° 46°
Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F

Temperature History - Apr 19

more Historical Weather Data >
  Today Normal Record 4/19/2013
High 66° 70° N/A 77°
Low 49° 45° N/A 48°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:29 AM with 13:18 of sunlight, then sets at 7:47 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at --:-- with of moolight, then sets at 9:55 AM

Top Story

Los Altos Weather Report

San Francisco: No Rain in Sight, Morning Clouds to Break for Afternoon Sunshine

April 17, 2014; 12:46 PM ET

For the remainder of the week and into the weekend, morning clouds will give way to mostly sunny skies. more >

Is it a Cold or the Flu?

Apr 7, 2014; 5:00 AM ET Symptoms caused by the common cold can often resemble those associated with the influenza virus, so how do you differentiate between the two?

Sat. Dust & Dander

Sat. Wind Maps