• Today

    Apr 18

    68°Lo 47°

    Sunny

    Neutral weather for asthma
    • Hi
      RealFeel
      70°
    • UV
      7 - High
    • Air Qual.
      Good
  • Sat

    Apr 19

    69°Lo 47°

    Mostly sunny

    Beneficial weather for asthma
    • Hi
      RealFeel
      69°
    • UV
      7 - High
    • Air Qual.
      Good
    more
  • Sun

    Apr 20

    74°Lo 43°

    Partly sunny and pleasant

    Beneficial weather for asthma
    • Hi
      RealFeel
      77°
    • UV
      7 - High
    • Air Qual.
      Good
    more
  • Mon

    Apr 21

    68°Lo 47°

    Periods of clouds and sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      66°
    • UV
      5 - Moderate
    • Cloud
      Cover
      70%
    more
  • Tue

    Apr 22

    62°Lo 40°

    Mostly cloudy, a shower; cool

    Beneficial weather for asthma
    • Hi
      RealFeel
      58°
    • UV
      5 - Moderate
    • Cloud
      Cover
      76%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Fri
3pm
4pm 5pm 6pm 7pm 8pm 9pm 10pm
  3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm
Forecast
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Sunny
Mostly Clear
Mostly Clear
Mostly Clear
Temp (°F) 67° 65° 67° 66° 63° 59° 55° 54°
RealFeel® 67° 63° 63° 61° 58° 53° 50° 49°
Humidity 65% 70% 64% 62% 65% 70% 77% 81%
   
  3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm
Rain
 
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0%
 
0%
Snow
 
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Ice
 
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  3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm
Wind (mph) 13 S 15 S 14 S 12 S 10 S 9 S 7 SSW 7 SW
UV Index 5 4 2 1 0 0 0 0
Cloud Cover 25% 25% 22% 13% 5% 25% 25% 26%
Dew Point 55° 55° 54° 52° 51° 49° 47° 48°
Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F

Temperature History - Apr 18

more Historical Weather Data >
  Today Normal Record 4/18/2013
High 68° 69° 90° (1950) 76°
Low 47° 42° 32° (1917) 41°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:29 AM with 13:19 of sunlight, then sets at 7:48 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:37 PM with 10:17 of moolight, then sets at 9:54 AM

Top Story

Napa Weather Report

San Francisco: No Rain in Sight, Morning Clouds to Break for Afternoon Sunshine

April 18, 2014; 2:06 PM ET

Through the holiday weekend, morning clouds will give way to mostly sunny skies. more >

Is it a Cold or the Flu?

Apr 7, 2014; 5:00 AM ET Symptoms caused by the common cold can often resemble those associated with the influenza virus, so how do you differentiate between the two?

Fri. Air Quality

Fri. Asthma Risk

Fri. UV Index