• Today

    Sep 23

    78°Lo 64°

    Areas of low clouds, then sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      78°
    • UV
      5 - Moderate
    • Cloud
      Cover
      51%
  • Wed

    Sep 24

    79°Lo 64°

    Partial sunshine

    Beneficial weather for migraines
    • Hi
      RealFeel
      79°
    • UV
      5 - Moderate
    • Cloud
      Cover
      45%
    more
  • Thu

    Sep 25

    74°Lo 60°

    Some sun with a few showers

    Beneficial weather for migraines
    • Hi
      RealFeel
      73°
    • UV
      5 - Moderate
    • Cloud
      Cover
      48%
    more
  • Fri

    Sep 26

    72°Lo 59°

    Partly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      73°
    • UV
      5 - Moderate
    • Cloud
      Cover
      26%
    more
  • Sat

    Sep 27

    72°Lo 58°

    Partly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      74°
    • UV
      5 - Moderate
    • Cloud
      Cover
      26%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
10am
11am 12pm 1pm 2pm 3pm 4pm 5pm
  10am 11am 12pm 1pm 2pm 3pm 4pm 5pm
Forecast
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Temp (°F) 66° 69° 73° 75° 77° 78° 77° 74°
RealFeel® 67° 72° 76° 77° 78° 78° 75° 71°
Humidity 76% 70% 64% 58% 54% 53% 56% 61%
   
  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 W 5 W 6 W 7 W 9 W 9 W 10 W 10 WNW
UV Index 2 4 4 5 5 4 3 1
Cloud Cover 81% 83% 80% 75% 24% 25% 25% 25%
Dew Point 59° 59° 60° 60° 59° 60° 60° 60°
Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F

Temperature History - Sep 23

more Historical Weather Data >
  Today Normal Record 9/23/2013
High 78° N/A N/A 77°
Low 64° N/A N/A 54°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:57 AM with 12:07 of sunlight, then sets at 7:04 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:27 AM with 12:18 of moolight, then sets at 6:45 PM

Top Story

Castro Valley Weather Report

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

September 23, 2014; 8:19 AM ET

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

Tue. Migraine Headache

Tue. UV Index