Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

63°F

17°C

Humidity 72%
Wind Speed W 6 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 28 Jun 08:35 PM PDT
Extended Forecast for

Union City CA

  • Tonight

    Tonight: Increasing clouds, with a low around 55. West wind 3 to 7 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Monday

    Monday: 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 20 mph.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 55. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 75. Light southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 75 °F

    Becoming
    Sunny

  • Tuesday Night

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

    Low: 54 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 55. West wind 3 to 7 mph.
Monday
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 20 mph.
Monday Night
Partly cloudy, with a low around 55. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 75. Light southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Tuesday Night
Partly cloudy, with a low around 54. South southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Mostly sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 56.
Independence Day
Mostly sunny, with a high near 75.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Partly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
Union City CA
 37.61°N 122.02°W (Elev. 184 ft)
2:05 pm PDT Jun 28, 2026
8pm PDT Jun 28, 2026-6pm PDT Jul 5, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database