• Tonight

    Apr 17

    Lo 50°

    Turning cloudy

    Asthma Weather
    • Hi
      RealFeel
      70°
    • UV
      7 - High
    • Air Qual.
      Good
    more
  • Fri

    Apr 18

    65°Lo 49°

    Low clouds, then some sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      67°
    • UV
      7 - High
    • Air Qual.
      Good
  • Sat

    Apr 19

    64°Lo 50°

    Mostly sunny

    Beneficial weather for asthma
    • Hi
      RealFeel
      67°
    • UV
      8 - Very High
    • Air Qual.
      Good
    more
  • Sun

    Apr 20

    67°Lo 51°

    Clouds giving way to some sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      67°
    • UV
      7 - High
    • Cloud
      Cover
      60%
    more
  • Mon

    Apr 21

    64°Lo 50°

    Low clouds, then some sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      64°
    • UV
      7 - High
    • Cloud
      Cover
      70%
    more
Next Previous
Hi 65° RealFeel® 67° Precipitation 3%

Day

N

E

S

W

  • WNW 10 mph
  • Gusts: 16 mph

Low clouds followed by some sun

  • Max UV Index: 7 (High)
  • 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® 44° Precipitation 1%

Night

N

E

S

W

  • W 7 mph
  • Gusts: 13 mph

Partly cloudy in the evening followed by low clouds

  • 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 - Apr 18

more Historical Weather Data >
  Today Normal Record 4/18/2013
High 65° 67° N/A 74°
Low 49° 47° N/A 47°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:30 AM with 13:17 of sunlight, then sets at 7:47 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:36 PM with 10:19 of moolight, then sets at 9:55 AM

Top Story

Foster City 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?

Fri. Air Quality

Fri. Asthma Risk

Fri. UV Index