• Today

    Apr 20

    66°Lo 50°

    Clouds breaking and warmer

    Beneficial weather for asthma
    • Hi
      RealFeel
      69°
    • UV
      7 - High
    • Air Qual.
      Moderate
  • Mon

    Apr 21

    61°Lo 49°

    Low clouds break for some sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      63°
    • UV
      7 - High
    • Air Qual.
      Good
    more
  • Tue

    Apr 22

    59°Lo 47°

    Mainly cloudy with a shower

    Neutral weather for asthma
    • Hi
      RealFeel
      58°
    • UV
      6 - High
    • Air Qual.
      Good
    more
  • Wed

    Apr 23

    63°Lo 52°

    Partly sunny

    Beneficial weather for asthma
    • Hi
      RealFeel
      62°
    • UV
      8 - Very High
    • Cloud
      Cover
      27%
    more
  • Thu

    Apr 24

    64°Lo 52°

    Intervals of clouds and sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      65°
    • UV
      7 - High
    • Cloud
      Cover
      46%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
11am
12pm 1pm 2pm 3pm 4pm 5pm 6pm
  11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm
Forecast
Cloudy
Cloudy
Cloudy
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Temp (°F) 59° 62° 64° 65° 66° 65° 64° 62°
RealFeel® 62° 68° 68° 69° 69° 66° 62° 59°
Humidity 70% 65% 60% 56% 54% 55% 57% 62%
   
  11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm
Rain
 
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0%
Snow
 
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Ice
 
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  11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm
Wind (mph) 4 WNW 6 WNW 8 WNW 9 W 10 W 10 W 10 W 9 W
UV Index 2 5 6 7 6 4 2 1
Cloud Cover 95% 96% 95% 26% 26% 26% 26% 26%
Dew Point 49° 50° 50° 49° 49° 49° 49° 49°
Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - Apr 20

more Historical Weather Data >
  Today Normal Record 4/20/2013
High 66° 63° 93° (2009) 71°
Low 50° 49° 42° (2008) 51°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:28 AM with 13:22 of sunlight, then sets at 7:50 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:33 AM with 10:23 of moolight, then sets at 10:56 AM

Top Story

San Francisco Weather Report

Chance of Rain in San Francisco on Tuesday

April 20, 2014; 4:09 AM ET

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

Is it a Cold or the Flu?

Apr 19, 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?

Sun. Air Quality

Sun. Asthma Risk

Sun. UV Index