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

Strong Storms and Heavy Rainfall Threats; Dangerous Heat for Southern Plains into the Southwest

Thunderstorms, some severe, will impact areas of the Plains into the Midwest today. Rainfall can be locally heavy as well from these storms with isolated instances of flash flooding. Monsoonal flow will enhance rainfall across the Four Corners into the central Rockies today. Meanwhile, summer heat continues for the southern Plains, Southwest into southern California. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

72°F

22°C

Humidity 60%
Wind Speed W 12 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 25 Aug 05:20 PM PDT
Extended Forecast for

Union City CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 59. West northwest wind 5 to 10 mph becoming light in the evening.

    Low: 59 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 82. Light west northwest wind increasing to 5 to 10 mph in the morning.

    High: 82 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 61. West northwest wind 5 to 9 mph becoming calm in the evening.

    Low: 61 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 80. Calm wind becoming west 5 to 9 mph in the afternoon.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 61. West wind 5 to 9 mph becoming light southwest after midnight.

    Low: 61 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

  • Friday Night

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

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 59. West northwest wind 5 to 10 mph becoming light in the evening.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 82. Light west northwest wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Increasing clouds, with a low around 61. West northwest wind 5 to 9 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 80. Calm wind becoming west 5 to 9 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 61. West wind 5 to 9 mph becoming light southwest after midnight.
Friday
Partly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 72.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Mostly sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Partly sunny, with a high near 68.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Partly sunny, with a high near 70.
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 Aug 25, 2026
Forecast Valid:
5pm PDT Aug 25, 2026-6pm PDT Sep 1, 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