
Heavy Lake Effect Snow; Subfreezing Temperatures in the Eastern U.S.
A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. The Arctic front will continue to bring increasing winds to the Northeast that will remain gusty. Subfreezing overnight low temperatures will be found as far south as the Gulf Coast. Read More >
Hazardous Weather Conditions
Current conditions at
Hayward, Hayward Air Terminal (KHWD)
Lat: 37.66083°NLon: 122.11833°WElev: 46.0ft.
Clear
54°F
12°C
| Humidity | 37% |
| Wind Speed | N 4 MPH |
| Barometer | 30.22 in (1023.37 mb) |
| Dewpoint | 28°F (-2°C) |
| Visibility | 10.00 mi |
| Last update | 29 Dec 07:20 PM PST |
Extended Forecast for
Union City CA
Coastal Flood Advisory December 31, 05:00am until January 4, 02:00pm
Tonight

Low: 39 °F
Clear
Tuesday

High: 55 °F
Increasing
CloudsTuesday Night
Low: 46 °F
Mostly Cloudy
then Chance
RainWednesday

High: 52 °F
Rain Likely
Wednesday Night

Low: 49 °F
Rain
New Year's Day

High: 56 °F
Rain
Thursday Night

Low: 53 °F
Rain Likely
Friday

High: 58 °F
Rain Likely
Friday Night

Low: 48 °F
Rain
Detailed Forecast
Tonight
Clear, with a low around 39. Northeast wind 7 to 9 mph.
Tuesday
Increasing clouds, with a high near 55. East northeast wind 6 to 10 mph.
Tuesday Night
A 30 percent chance of rain after 4am. Mostly cloudy, with a low around 46. East northeast wind 9 to 14 mph.
Wednesday
Rain likely, mainly after 10am. Cloudy, with a high near 52. East northeast wind 6 to 11 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain. Low around 49. Southeast wind 7 to 9 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
New Year's Day
Rain. High near 56. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain likely. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Friday
Rain likely. Cloudy, with a high near 58.
Friday Night
Rain. Mostly cloudy, with a low around 48.
Saturday
Rain likely, mainly before 4pm. Mostly cloudy, with a high near 54.
Saturday Night
Rain likely. Mostly cloudy, with a low around 46.
Sunday
A chance of rain. Partly sunny, with a high near 55.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 46.
Monday
A chance of rain. Partly sunny, with a high near 55.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Union City CA
37.61°N 122°W (Elev. 594 ft)
37.61°N 122°W (Elev. 594 ft)
12:27 pm PST Dec 29, 2025
7pm PST Dec 29, 2025-6pm PST Jan 5, 2026



