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

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

Lat: 37.66083°NLon: 122.11833°WElev: 46.0ft.

Clear

75°F

24°C

Humidity 47%
Wind Speed WNW 14 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 29 Jun 02:54 PM PDT
Extended Forecast for

Union City CA

  • Tonight

    Tonight: Mostly clear, with a low around 56. West northwest wind 5 to 10 mph becoming light after midnight.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. Light and variable wind becoming west northwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 55. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 74. West southwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 74 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54. West wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 56. West northwest wind 5 to 10 mph becoming light after midnight.
Tuesday
Sunny, with a high near 77. Light and variable wind becoming west northwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Increasing clouds, with a low around 55. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 74. West southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 54. West wind 9 to 13 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 72.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Mostly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 56.
Independence Day
Mostly sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Mostly sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Mostly sunny, with a high near 72.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Union City CA
 37.61°N 122.02°W (Elev. 184 ft)
Last Update:
1:26 pm PDT Jun 29, 2026
Forecast Valid:
3pm PDT Jun 29, 2026-6pm PDT Jul 6, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation