Active Weather Pattern To Persist Over The Western U.S., Inclement Weather Expected Over The East

A series of storm systems will bring a continued threat for heavy rain, strong winds, and rough surf to coastal locations from northern California to the Northwest U.S. into the weekend. Heavy snow will be likely across the Intermountain West. Over the eastern U.S., low pressure will gather strength and move up the eastern seaboard Friday into Saturday bringing ice, rain, and gusty winds. Read More >

Current conditions at

LOS ALTOS (LOAC1)

Lat: 37.354722°NLon: 122.141667°WElev: 539ft.

NA

58°F

14°C

Humidity 100%
Wind Speed SSE 1 MPH
Barometer 1025.74 mb
Dewpoint 58°F (14°C)
Visibility NA
Last update 12 Dec 08:10 PM PST
Extended Forecast for

Sunnyvale CA

  • Tonight

    Tonight: Patchy fog.  Otherwise, mostly cloudy, with a low around 52. Calm wind.

    Patchy Fog

    Low: 52 °F

  • Friday

    Friday: A 40 percent chance of rain after 4pm.  Patchy fog before 11am.  Otherwise, mostly cloudy, with a high near 61. Calm wind.

    Patchy Fog
    then Chance
    Rain

    High: 61 °F

  • Friday
    Night

    Friday Night: A 40 percent chance of rain, mainly before 9pm.  Patchy fog.  Otherwise, cloudy, with a low around 49. Calm wind.  New precipitation amounts of less than a tenth of an inch possible.

    Chance Rain
    and Patchy
    Fog

    Low: 49 °F

  • Saturday

    Saturday: A slight chance of rain between 10am and 1pm, then a slight chance of showers after 1pm.  Patchy fog before 10am.  Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 57. Calm wind becoming west northwest 5 to 7 mph in the morning.  Chance of precipitation is 20%.

    Slight Chance
    Rain and
    Patchy Fog

    High: 57 °F

  • Saturday
    Night

    Saturday Night: Mostly cloudy, with a low around 42. West northwest wind around 6 mph.

    Mostly Cloudy

    Low: 42 °F

  • Sunday

    Sunday: Mostly sunny, with a high near 56.

    Mostly Sunny

    High: 56 °F

  • Sunday
    Night

    Sunday Night: Partly cloudy, with a low around 39.

    Partly Cloudy

    Low: 39 °F

  • Monday

    Monday: Mostly sunny, with a high near 57.

    Mostly Sunny

    High: 57 °F

  • Monday
    Night

    Monday Night: Mostly cloudy, with a low around 41.

    Mostly Cloudy

    Low: 41 °F

Detailed Forecast

Tonight
Patchy fog. Otherwise, mostly cloudy, with a low around 52. Calm wind.
Friday
A 40 percent chance of rain after 4pm. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 61. Calm wind.
Friday Night
A 40 percent chance of rain, mainly before 9pm. Patchy fog. Otherwise, cloudy, with a low around 49. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A slight chance of rain between 10am and 1pm, then a slight chance of showers after 1pm. Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 57. Calm wind becoming west northwest 5 to 7 mph in the morning. Chance of precipitation is 20%.
Saturday Night
Mostly cloudy, with a low around 42. West northwest wind around 6 mph.
Sunday
Mostly sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 57.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
A slight chance of rain after 10am. Mostly cloudy, with a high near 58.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 44.
Wednesday
A chance of rain. Cloudy, with a high near 57.
Wednesday Night
A chance of rain. Cloudy, with a low around 45.
Thursday
A chance of rain. Mostly cloudy, with a high near 58.
Click Map For Forecast
Point Forecast:
Sunnyvale CA
 37.38°N 122.05°W (Elev. 118 ft)
9:17 pm PST Dec 12, 2019
10pm PST Dec 12, 2019-6pm PST Dec 19, 2019
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database