Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

Mountain View, Moffett Field (KNUQ)

Lat: 37.40583°NLon: 122.04806°WElev: 33.0ft.

Clear

72°F

22°C

Humidity 46%
Wind Speed NNW 12 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 04 Sep 04:55 PM PDT
Extended Forecast for

Sunnyvale CA

  • Tonight

    Tonight: Mostly clear, with a low around 57. Northwest wind 6 to 11 mph becoming light and variable  after midnight.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75. Light and variable wind becoming north northwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57. Northwest wind 5 to 10 mph becoming light west  in the evening. Winds could gust as high as 18 mph.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 73. Light west wind becoming west northwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 73 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56. West northwest wind 6 to 11 mph becoming light west  after midnight. Winds could gust as high as 20 mph.

    Low: 56 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain after 11pm.  Partly cloudy, with a low around 62.

    Low: 62 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 57. Northwest wind 6 to 11 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 75. Light and variable wind becoming north northwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 57. Northwest wind 5 to 10 mph becoming light west in the evening. Winds could gust as high as 18 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 73. Light west wind becoming west northwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
Mostly clear, with a low around 56. West northwest wind 6 to 11 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Labor Day
Sunny, with a high near 80.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
A slight chance of rain after 11pm. Partly cloudy, with a low around 62.
Wednesday
A slight chance of rain. Partly sunny, with a high near 79.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 63.
Thursday
A slight chance of rain. Mostly sunny, with a high near 80.
Thursday Night
Partly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 76.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Sunnyvale CA
 37.38°N 122.05°W (Elev. 118 ft)
1:26 pm PDT Sep 4, 2026
5pm PDT Sep 4, 2026-6pm PDT Sep 11, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database