Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

43°F

6°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.26 in (1024.72 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 27 Dec 11:35 PM PST
Extended Forecast for

Union City CA

  • Tonight

    Tonight: Partly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 52. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 52 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. Northeast wind around 5 mph.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 54. Northeast wind around 6 mph.

    High: 54 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 38. Light east northeast wind.

    Low: 38 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain.  Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 37. Calm wind.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 52. Calm wind becoming north northeast around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 36. Northeast wind around 5 mph.
Monday
Sunny, with a high near 54. Northeast wind around 6 mph.
Monday Night
Clear, with a low around 38. Light east northeast wind.
Tuesday
Sunny, with a high near 55.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 55.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 44.
New Year's Day
Rain likely. Mostly cloudy, with a high near 56.
Thursday Night
Rain likely. Mostly cloudy, with a low around 47.
Friday
A chance of rain. Partly sunny, with a high near 54.
Friday Night
A chance of rain. Mostly cloudy, with a low around 45.
Saturday
A slight chance of rain. Mostly cloudy, with a high near 54.
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ABOUT THIS FORECAST

 
Point Forecast:
Union City CA
 37.61°N 122°W (Elev. 594 ft)
12:27 pm PST Dec 27, 2025
11pm PST Dec 27, 2025-6pm PST Jan 3, 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