• Today

    Dec 17

    58°Lo 50°

    Rain and drizzle in the p.m.

    Good for biking
    • Precip
      70%
    • Hours of Precip
      3.5
    • Wind
      Gust
      9 mph
  • Thu

    Dec 18

    61°Lo 50°

    Mostly cloudy

    Very Good for biking
    • Precip
      13%
    • Hours of Precip
      0
    • Wind
      Gust
      6 mph
    more
  • Fri

    Dec 19

    61°Lo 49°

    Periods of rain

    Poor for biking
    • Precip
      65%
    • Hours of Precip
      3.5
    • Wind
      Gust
      7 mph
    more
  • Sat

    Dec 20

    60°Lo 48°

    Periods of sun

    Very Good for biking
    • Precip
      6%
    • Hours of Precip
      0
    • Wind
      Gust
      7 mph
    more
  • Sun

    Dec 21

    64°Lo 50°

    Periods of clouds and sun

    Excellent for biking
    • Precip
      7%
    • Hours of Precip
      0
    • Wind
      Gust
      7 mph
    more
Next Previous
Hi 58° RealFeel® 60° Precipitation 70%

Day

N

E

S

W

  • SE 5 mph
  • Gusts: 9 mph

Mostly cloudy; a shower in spots this morning followed by rain and drizzle this afternoon

  • Max UV Index: 2 (Low)
  • Thunderstorms: 20%
  • Precipitation: 0.35 in
  • Rain: 0.35 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 3.5 hrs
  • Hours of Rain: 3.5 hrs
Lo 50° RealFeel® 48° Precipitation 67%

Night

N

E

S

W

  • SSE 6 mph
  • Gusts: 9 mph

Mostly cloudy with showers, mainly early

  • Max UV Index: N/A
  • Thunderstorms: 20%
  • Precipitation: 0.1 in
  • Rain: 0.1 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs

Temperature History - Dec 17

more Historical Weather Data >
  Today Normal Record 12/17/2013
High 58° 58° N/A 61°
Low 50° 38° N/A 41°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:17 AM with 9:35 of sunlight, then sets at 4:52 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:40 AM with 11:15 of moolight, then sets at 1:55 PM

Los Altos Weather Report

San Francisco: Dry Weather Ahead for the Weekend

December 17, 2014; 6:49 PM ET

Conditions will turn dry for San Francisco this weekend and last into next week. 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.