• Early AM

    Apr 21

    Lo 44°

    Increasing clouds

    Home Energy Efficiency Weather
    • Avg
      RealFeel
      49°
    • Hi
      RealFeel
      59°
    • Wind
      Speed
      5 mph
    more
  • Today

    Apr 21

    66°Lo 48°

    Partly sunny and not as warm

    Fair for home energy
    • Avg
      RealFeel
      59°
    • Hi
      RealFeel
      66°
    • Wind
      Speed
      8 mph
  • Tue

    Apr 22

    62°Lo 45°

    Mostly cloudy with a shower

    Fair for home energy
    • Avg
      RealFeel
      53°
    • Hi
      RealFeel
      61°
    • Wind
      Speed
      12 mph
    more
  • Wed

    Apr 23

    66°Lo 44°

    Cool with partial sunshine

    Poor for home energy
    • Avg
      RealFeel
      61°
    • Hi
      RealFeel
      70°
    • Wind
      Speed
      8 mph
    more
  • Thu

    Apr 24

    68°Lo 50°

    Periods of sun

    Poor for home energy
    • Avg
      RealFeel
      61°
    • Hi
      RealFeel
      69°
    • Wind
      Speed
      10 mph
    more
Next Previous
Next 8 hours >
  Mon
12am
1am 2am 3am 4am 5am 6am 7am
  12am 1am 2am 3am 4am 5am 6am 7am
Forecast
Clear
Clear
Mostly Clear
Partly Cloudy
Cloudy
Cloudy
Mostly Cloudy
Mostly Cloudy
Temp (°F) 51° 52° 50° 44° 44° 45° 46° 49°
RealFeel® 47° 47° 45° 39° 40° 41° 41° 45°
Humidity 86% 87% 91% 100% 100% 100% 98% 93%
   
  12am 1am 2am 3am 4am 5am 6am 7am
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%
   
  12am 1am 2am 3am 4am 5am 6am 7am
Wind (mph) 6 SSW 6 SSW 7 SSW 6 SSW 6 SSW 6 SW 6 SW 6 WSW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 0% 8% 18% 34% 55% 74% 85% 87%
Dew Point 47° 48° 47° 44° 44° 45° 45° 47°
Middle Grid line 55 F Middle Grid line 50 F Middle Grid line 45 F Middle Grid line 40 F

Temperature History - Apr 21

more Historical Weather Data >
  Today Normal Record 4/21/2013
High 66° 69° 91° (2009) 83°
Low 48° 42° 30° (2008) 40°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:27 AM with 13:23 of sunlight, then sets at 7:50 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:33 AM with 10:21 of moolight, then sets at 10:54 AM

Top Story

Napa Weather Report

Chance of Rain in San Francisco on Tuesday

April 20, 2014; 9:00 PM ET

There hasn't been any measurable precipitation in San Francisco since April 4. more >

Energy Efficient Lightbulbs and S.A.D

Sep 8, 2012; 5:00 AM ET With shorter days and colder nights in the fall and winter, some people develop seasonal affective disorder. When shopping for lightbulbs to treat the 'winter blues,'consider energy-efficient bulbs.

Mon. Home Energy Efficiency

Mon. Degree Days

Mon. UV Index