• Early AM

    Feb 14

    Lo 47°

    Mainly clear

    Bicycling Weather
    • Precip
      4%
    • Hours of Precip
      0
    • Wind
      Gust
      10 mph
    more
  • Today

    Feb 14

    73°Lo 52°

    Mostly sunny

    Excellent for biking
    • Precip
      4%
    • Hours of Precip
      0
    • Wind
      Gust
      10 mph
    more
  • Mon

    Feb 15

    74°Lo 49°

    Sunny

    Excellent for biking
    • Precip
      5%
    • Hours of Precip
      0
    • Wind
      Gust
      6 mph
  • Tue

    Feb 16

    75°Lo 54°

    Sunny much of the time

    Excellent for biking
    • Precip
      25%
    • Hours of Precip
      0
    • Wind
      Gust
      9 mph
    more
  • Wed

    Feb 17

    63°Lo 50°

    Cooler; a little p.m. rain

    Very Good for biking
    • Precip
      75%
    • Hours of Precip
      3
    • Wind
      Gust
      20 mph
    more
Next Previous
Hi 74° RealFeel® 74° Precipitation 7%

Day

N

E

S

W

  • NNE 6 mph
  • Gusts: 9 mph

Sunny

  • Max UV Index: 4 (Moderate)
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 49° RealFeel® 50° Precipitation 5%

Night

N

E

S

W

  • E 2 mph
  • Gusts: 6 mph

Clear

  • Max UV Index: N/A
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Feb 15

more Historical Weather Data >
  Today Normal Record 2/15/2015
High 74° 61° N/A 74°
Low 49° 45° N/A 50°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:58 AM with 10:50 of sunlight, then sets at 5:48 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:45 AM with 14:15 of moolight, then sets at 2:00 AM

Castro Valley Weather Report

San Francisco: Record-challenging warmth to return early this week

February 14, 2016; 4:25 AM ET

Dry and unseasonably warm conditions will continue in San Francisco next week with another shot of record-breaking warmth. 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.