• Today

    Sep 22

    75°Lo 62°

    Decreasing clouds

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      77°
    • UV
      6 - High
    • Cloud
      Cover
      25%
  • Tue

    Sep 23

    76°Lo 65°

    Areas of low clouds, then sun

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      77°
    • UV
      5 - Moderate
    • Cloud
      Cover
      55%
    more
  • Wed

    Sep 24

    78°Lo 64°

    Partly sunny

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      77°
    • UV
      6 - High
    • Cloud
      Cover
      26%
    more
  • Thu

    Sep 25

    74°Lo 59°

    Some sun with a few showers

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      74°
    • UV
      5 - Moderate
    • Cloud
      Cover
      46%
    more
  • Fri

    Sep 26

    72°Lo 59°

    Partly sunny

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      72°
    • UV
      5 - Moderate
    • Cloud
      Cover
      26%
    more
Next Previous
Hi 75° RealFeel® 77° Precipitation 1%

Day

N

E

S

W

  • WNW 7 mph
  • Gusts: 14 mph

After a cloudy start, sunshine returns

  • Max UV Index: 6 (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 62° RealFeel® 60° Precipitation 1%

Night

N

E

S

W

  • NW 4 mph
  • Gusts: 10 mph

Mainly clear early, then areas of low clouds forming

  • 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 - Sep 22

more Historical Weather Data >
  Today Normal Record 9/22/2013
High 75° N/A N/A 70°
Low 62° N/A N/A 53°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:56 AM with 12:10 of sunlight, then sets at 7:06 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:32 AM with 12:43 of moolight, then sets at 6:15 PM

Top Story

Castro Valley Weather Report

Dry, Sunny Weather Continues for Much of the Week in San Francisco

September 22, 2014; 8:19 AM ET

Sunshine will continue for much of the region this week. more >

New Year, New You

Dec 24, 2012; 5:00 AM ET Start 2013 right with these tips on how to set realistic New Year's resolutions!

Mon. Sinus Headache

Mon. UV Index