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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

55°F

13°C

Humidity 82%
Wind Speed N 0 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 50°F (10°C)
Visibility 8.00 mi
Last update 22 Mar 12:35 AM PDT
Extended Forecast for

Union City CA

  • Overnight

    Overnight: Mostly clear, with a low around 51. West wind around 5 mph becoming calm.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74. Calm wind becoming west northwest 5 to 8 mph in the afternoon.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 51. West southwest wind 3 to 8 mph.

    Low: 51 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 75. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. West wind 5 to 9 mph becoming calm after midnight.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 51. West wind around 5 mph becoming calm.
Sunday
Sunny, with a high near 74. Calm wind becoming west northwest 5 to 8 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 51. West southwest wind 3 to 8 mph.
Monday
Sunny, with a high near 75. Calm wind becoming west 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 54. West wind 5 to 9 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 53.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Mostly cloudy, with a low around 53.
Friday
Partly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Union City CA
 37.61°N 122°W (Elev. 594 ft)
Last Update:
12:32 am PDT Mar 22, 2026
Forecast Valid:
12am PDT Mar 22, 2026-6pm PDT Mar 28, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation