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
50°F
10°C
| Humidity | 46% |
| Wind Speed | NE 4 MPH |
| Barometer | 30.23 in (1023.71 mb) |
| Dewpoint | 30°F (-1°C) |
| Visibility | 10.00 mi |
| Wind Chill | 49°F (9°C) |
| Last update | 29 Dec 08:35 PM PST |
Extended Forecast for
2 Miles NNW Castro Valley CA
Coastal Flood Advisory December 31, 05:00am until January 4, 02:00pm
Tonight
Low: 36 °F
Clear then
Patchy FrostTuesday
High: 57 °F
Increasing
CloudsTuesday Night
Low: 45 °F
Mostly Cloudy
then Chance
RainWednesday
High: 53 °F
Rain Likely
Wednesday Night
Low: 48 °F
Rain
New Year's Day
High: 58 °F
Rain
Thursday Night
Low: 53 °F
Rain
Friday
High: 59 °F
Rain Likely
Friday Night
Low: 47 °F
Rain
Detailed Forecast
Tonight
Patchy frost between 4am and 5am. Otherwise, clear, with a low around 36. Northeast wind around 7 mph.
Tuesday
Increasing clouds, with a high near 57. East northeast wind 7 to 9 mph.
Tuesday Night
A 30 percent chance of rain after 4am. Cloudy, with a low around 45. East northeast wind 7 to 9 mph.
Wednesday
Rain likely, mainly after 10am. Cloudy, with a high near 53. East northeast wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain. Low around 48. East wind 5 to 8 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 58. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain. Low around 53. Chance of precipitation is 80%.
Friday
Rain likely. Cloudy, with a high near 59.
Friday Night
Rain. Mostly cloudy, with a low around 47.
Saturday
Rain likely. Mostly cloudy, with a high near 56.
Saturday Night
Rain likely. Mostly cloudy, with a low around 45.
Sunday
A chance of rain. Partly sunny, with a high near 57.
Sunday Night
Rain likely. Mostly cloudy, with a low around 46.
Monday
Rain likely. Partly sunny, with a high near 57.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
2 Miles NNW Castro Valley CA
37.73°N 122.08°W (Elev. 614 ft)
37.73°N 122.08°W (Elev. 614 ft)
12:27 pm PST Dec 29, 2025
8pm PST Dec 29, 2025-6pm PST Jan 5, 2026
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