• Today

    Apr 21

    64°Lo 45°

    Mostly cloudy and breezy

    Beneficial weather for migraines
    • Hi
      RealFeel
      63°
    • UV
      5 - Moderate
    • Cloud
      Cover
      76%
  • Wed

    Apr 22

    69°Lo 44°

    Mostly cloudy

    Beneficial weather for migraines
    • Hi
      RealFeel
      71°
    • UV
      6 - High
    • Cloud
      Cover
      76%
    more
  • Thu

    Apr 23

    70°Lo 41°

    Partly sunny and cool

    Beneficial weather for migraines
    • Hi
      RealFeel
      70°
    • UV
      7 - High
    • Cloud
      Cover
      39%
    more
  • Fri

    Apr 24

    67°Lo 40°

    Cool with sun and some clouds

    Beneficial weather for migraines
    • Hi
      RealFeel
      67°
    • UV
      6 - High
    • Cloud
      Cover
      43%
    more
  • Sat

    Apr 25

    69°Lo 43°

    Partly sunny and cool

    Beneficial weather for migraines
    • Hi
      RealFeel
      69°
    • UV
      7 - High
    • Cloud
      Cover
      26%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
6am
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Forecast
Cloudy
Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Temp (°F) 48° 47° 49° 52° 54° 56° 59° 60°
RealFeel® 41° 41° 42° 46° 50° 53° 57° 60°
Humidity 94% 96% 88% 83% 79% 77% 74% 71%
   
  6am 7am 8am 9am 10am 11am 12pm 1pm
Rain
 
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Snow
 
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Ice
 
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  6am 7am 8am 9am 10am 11am 12pm 1pm
Wind (mph) 10 WSW 10 WSW 13 WSW 13 WSW 14 WSW 15 SW 15 SW 16 SW
UV Index 0 0 0 1 2 3 5 5
Cloud Cover 100% 97% 76% 76% 76% 76% 76% 76%
Dew Point 46° 46° 46° 47° 48° 49° 50° 51°
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

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 64° 72° 95° (2009) 73°
Low 45° 46° 30° (1963) 47°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:25 AM with 13:26 of sunlight, then sets at 7:51 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:49 AM with 14:28 of moolight, then sets at 11:17 PM

Napa Weather Report

San Francisco: Clouds, Showers to Linger Ahead of Weekend

April 21, 2015; 6:20 AM ET

While cloudy conditions can be expected over the San Francisco area for the next several days, showers will not make a return until the middle of the week. more >

Tue. Migraine Headache

Tue. UV Index