• Today

    Feb 6

    65°Lo 46°

    Sun and some clouds

    Excellent for biking
    • Precip
      4%
    • Hours of Precip
      0
    • Wind
      Gust
      7 mph
  • Sun

    Feb 7

    68°Lo 47°

    Plenty of sunshine

    Excellent for biking
    • Precip
      1%
    • Hours of Precip
      0
    • Wind
      Gust
      9 mph
    more
  • Mon

    Feb 8

    70°Lo 48°

    Plenty of sunshine

    Excellent for biking
    • Precip
      2%
    • Hours of Precip
      0
    • Wind
      Gust
      8 mph
    more
  • Tue

    Feb 9

    70°Lo 45°

    Plenty of sunshine

    Excellent for biking
    • Precip
      3%
    • Hours of Precip
      0
    • Wind
      Gust
      6 mph
    more
  • Wed

    Feb 10

    68°Lo 47°

    Partly sunny

    Excellent for biking
    • Precip
      12%
    • Hours of Precip
      0
    • Wind
      Gust
      6 mph
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sat
10am
11am 12pm 1pm 2pm 3pm 4pm 5pm
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Forecast
Partly Sunny
Partly Sunny
Partly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Temp (°F) 54° 58° 60° 62° 64° 65° 64° 62°
RealFeel® 60° 64° 67° 69° 67° 66° 64° 61°
Humidity 71% 66% 57% 51% 47% 47% 48% 53%
   
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
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%
   
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Wind (mph) 4 NE 4 NE 4 NNE 5 NNE 6 NNE 6 NNE 6 NNE 5 NNE
UV Index 2 3 3 3 2 1 0 0
Cloud Cover 46% 46% 46% 11% 11% 11% 11% 11%
Dew Point 45° 46° 45° 44° 43° 44° 44° 45°
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 - Feb 6

more Historical Weather Data >
  Today Normal Record 2/6/2015
High 65° 60° N/A 60°
Low 46° 44° N/A 54°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:08 AM with 10:30 of sunlight, then sets at 5:38 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:26 AM with 10:33 of moolight, then sets at 3:59 PM

Castro Valley Weather Report

Super Bowl Sunday: Break in wet El Nino-driven weather pattern to arrive in time for big game

February 6, 2016; 12:55 PM ET

Dry conditions and above-normal temperatures are expected for Super Bowl Sunday in Santa Clara, California. more >

Is Your Outdoor Gear Waterproof?

Dec 5, 2012; 5:00 AM ET Now that it's cold enough to hit the slopes, you may want to look more closely at what materials your winter sports gear is made of. As it turns out, not all waterproofing is created equal.