National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

Mountain View, Moffett Field (KNUQ)

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

Overcast

61°F

16°C

Humidity 82%
Wind Speed NE 4 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 21 Aug 07:15 AM PDT
Extended Forecast for

Sunnyvale CA

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 76. Light north northwest wind increasing to 5 to 10 mph in the morning.

    High: 76 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Increasing clouds, with a low around 58. North wind 3 to 8 mph.

    Low: 58 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 78. Light north northwest wind becoming northwest 5 to 10 mph in the afternoon.

    High: 78 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 59. Northwest wind 5 to 10 mph becoming light west in the evening.

    Low: 59 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 78. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 76. Light north northwest wind increasing to 5 to 10 mph in the morning.
Tonight
Increasing clouds, with a low around 58. North wind 3 to 8 mph.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 78. Light north northwest wind becoming northwest 5 to 10 mph in the afternoon.
Saturday Night
Increasing clouds, with a low around 59. Northwest wind 5 to 10 mph becoming light west in the evening.
Sunday
Mostly sunny, with a high near 78. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Partly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Mostly sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sunnyvale CA
 37.38°N 122.05°W (Elev. 118 ft)
Last Update:
2:16 am PDT Aug 21, 2026
Forecast Valid:
7am PDT Aug 21, 2026-6pm PDT Aug 27, 2026
 
Forecast Discussion
 
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Additional Resources

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