, °F

Personalized Forecasts

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    • Today

      Sep 29

      71° /54°F
      Low clouds, then sunshine
      • Beneficial
      • weather for sinus headaches
      • Hi RealFeel: 75°
      • UV: 4 - Moderate
      • Cloud Cover: 38%
    • Fri

      Sep 30

      68° /55°
      Low clouds, then some sun
      • Beneficial
      • weather for sinus headaches
      • Hi RealFeel: 70°
      • UV: 4 - Moderate
      • Cloud Cover: 60%
      More
    • Sat

      Oct 1

      71° /54°
      Low clouds breaking
      • Beneficial
      • weather for sinus headaches
      • Hi RealFeel: 71°
      • UV: 4 - Moderate
      • Cloud Cover: 70%
      More
    • Sun

      Oct 2

      69° /54°
      Cool with clouds and sun
      • Beneficial
      • weather for sinus headaches
      • Hi RealFeel: 70°
      • UV: 4 - Moderate
      • Cloud Cover: 48%
      More
    • Mon

      Oct 3

      67° /52°
      Partly sunny and cool
      • Beneficial
      • weather for sinus headaches
      • Hi RealFeel: 68°
      • UV: 4 - Moderate
      • Cloud Cover: 40%
      More
    Thursday
    5pm
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    12am
    Forecast Mostly Sunny Mostly Sunny Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear
    Temp (°F) 67° 66° 64° 62° 60° 59° 58° 57°
    RealFeel® 65° 63° 61° 60° 59° 58° 58° 57°
    Wind (mph) 13 NNW 10 NNW 9 NW 7 NW 6 WNW 5 WNW 4 W 4 W
    precip
    5pm
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    Rain
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    Snow
    0%
    0%
    0%
    0%
    0%
    0%
    0%
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    Ice
    0%
    0%
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    0%
    0%
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    0%
    0%
    SKY
    5pm
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    8pm
    9pm
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    12am
    UV Index 1 0 0 0 0 0 0 0
    Cloud Cover 14% 11% 11% 11% 11% 11% 11% 24%
    Humidity 58% 60% 67% 68% 70% 75% 77% 78%
    Dew Point 52° 52° 52° 51° 50° 51° 51° 50°
    Temp °F
    5pm
    6pm
    7pm
    8pm
    9pm
    10pm
    11pm
    12am
    70° 65° 60° 55°

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/29/2015
    High 71° 78° N/A 71°
    Low 54° 51° N/A 59°

    Sunrise/Sunset

    • Sunrise: 7:03 AM
    • Sunset: 6:53 PM
    • Duration: 11:50 hr

    Moonrise/Moonset

    • Moonrise: 5:46 AM
    • Moonset: 6:28 PM
    • Duration: 12:42 hr
    Astronomy

    Sunnyvale Weather Report

    Cooler air, showers to aid in wildfire efforts across California this weekend

    September 29, 2016; 2:55 PM ET

    Improving weather over the next several days will aid officials in battling wildfires across California. More >

    Thu. Sinus Headache

    Thu. UV Index