• Tonight

    Mar 3

    Lo 42°

    Mainly clear and chilly

    Migraine Headache Weather
    • Hi
      RealFeel
      71°
    • UV
      5 - Moderate
    • Cloud
      Cover
      13%
  • Wed

    Mar 4

    65°Lo 42°

    Mostly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      71°
    • UV
      5 - Moderate
    • Cloud
      Cover
      11%
    more
  • Thu

    Mar 5

    68°Lo 42°

    Plenty of sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      74°
    • UV
      5 - Moderate
    • Cloud
      Cover
      0%
    more
  • Fri

    Mar 6

    70°Lo 44°

    Plenty of sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      74°
    • UV
      5 - Moderate
    • Cloud
      Cover
      0%
    more
  • Sat

    Mar 7

    72°Lo 47°

    Plenty of sunshine

    Beneficial weather for migraines
    • Hi
      RealFeel
      75°
    • UV
      5 - Moderate
    • Cloud
      Cover
      10%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
7am
8am 9am 10am 11am 12pm
  7am 8am 9am 10am 11am 12pm
Forecast
Sunny
Sunny
Sunny
Sunny
Mostly Sunny
Sunny
Temp (°F) 45° 48° 52° 56° 59° 60°
RealFeel® 46° 51° 58° 65° 69° 71°
Humidity 84% 78% 71% 65% 60% 55%
   
  7am 8am 9am 10am 11am 12pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  7am 8am 9am 10am 11am 12pm
Wind (mph) 2 N 2 N 2 N 2 WSW 2 SW 5 SW
UV Index 0 1 2 3 5 5
Cloud Cover 7% 8% 6% 8% 13% 9%
Dew Point 40° 41° 42° 44° 45° 44°
Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F Middle Grid line 45 F Middle Grid line 40 F

Temperature History - Mar 3

more Historical Weather Data >
  Today Normal Record 3/3/2014
High 64° N/A N/A 58°
Low 42° N/A N/A 48°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:37 AM with 11:27 of sunlight, then sets at 6:04 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:34 PM with 13:18 of moolight, then sets at 5:52 AM

Castro Valley Weather Report

San Francisco: Dry Pattern to Return Bringing Sunny, Warm Days

March 3, 2015; 12:44 PM ET

San Francisco will get progressively warmer everyday this week, reaching 70 degrees F by the weekend. more >

Making a Forecast: The Sixth Sense

Feb 16, 2015; 5:00 AM ET What steps go into making a forecast?

Tue. Migraine Headache

Tue. UV Index