• Today

    May 27

    68°Lo 51°

    Clouds giving way to some sun

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      1%
    • Hi
      RealFeel
      69°
    more
  • Thu

    May 28

    73°Lo 51°

    Low clouds, then some sun

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      2%
    • Hi
      RealFeel
      73°
  • Fri

    May 29

    74°Lo 51°

    Turning sunny; pleasant

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      1%
    • Hi
      RealFeel
      76°
    more
  • Sat

    May 30

    75°Lo 52°

    Areas of low clouds, then sun

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      1%
    • Hi
      RealFeel
      76°
    more
  • Sun

    May 31

    72°Lo 53°

    Low clouds, then some sun

    Excellent for lawn mowing
    • Hours of Precip
      1
    • Precip
      12%
    • Hi
      RealFeel
      73°
    more
Next Previous
< Previous 8 hours Next 8 hours >
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Forecast
Mostly Cloudy
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Mostly Cloudy
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Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Cloudy
Temp (°F) 53° 53° 52° 52° 52° 51° 52° 54°
RealFeel® 49° 50° 49° 49° 49° 49° 52° 53°
Humidity 91% 90% 91% 90% 91% 95% 91% 89%
   
  1am 2am 3am 4am 5am 6am 7am 8am
Rain
 
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Snow
 
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  1am 2am 3am 4am 5am 6am 7am 8am
Wind (mph) 8 WSW 7 WSW 7 WSW 7 WSW 6 W 6 W 5 W 6 W
UV Index 0 0 0 0 0 0 0 1
Cloud Cover 76% 76% 76% 76% 76% 76% 76% 95%
Dew Point 50° 50° 50° 49° 49° 49° 50° 50°
Middle Grid line 55 F Middle Grid line 50 F

Temperature History - May 28

more Historical Weather Data >
  Today Normal Record 5/28/2014
High 73° 78° 98° (1984) 83°
Low 51° 51° 37° (1927) 47°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:49 AM with 14:35 of sunlight, then sets at 8:24 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:46 PM with 11:45 of moolight, then sets at 3:31 AM

Napa Weather Report

San Francisco: Dry, Pleasant Weather to Hold Through Weekend

May 27, 2015; 6:50 PM ET

A dry and quiet pattern will be in place across the Bay area over the next several days before rain returns early in the new week. more >

Why Do Leaves Change Color?

Sep 20, 2011; 5:00 AM ET Why do leaves change from green to beautiful shades of red, orange and yellow in the fall?

Thu. Overnight Freeze

Thu. Degree Days

Thu. Evapotranspiration