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

Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Overcast

63°F

17°C

Humidity 77%
Wind Speed W 6 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 17 Aug 09:05 AM PDT
Extended Forecast for

2 Miles WNW Union City CA

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 69. West wind 7 to 13 mph, with gusts as high as 18 mph.

    High: 69 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. West wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 58 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 72. West wind 5 to 10 mph.

    High: 72 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 57. West wind 6 to 11 mph becoming light southwest after midnight. Winds could gust as high as 18 mph.

    Low: 57 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72. Light southwest wind becoming west 5 to 9 mph in the afternoon.

    High: 72 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 69. West wind 7 to 13 mph, with gusts as high as 18 mph.
Tonight
Mostly cloudy, with a low around 58. West wind 6 to 10 mph, with gusts as high as 18 mph.
Monday
Mostly cloudy through mid morning, then gradual clearing, with a high near 72. West wind 5 to 10 mph.
Monday Night
Increasing clouds, with a low around 57. West wind 6 to 11 mph becoming light southwest after midnight. Winds could gust as high as 18 mph.
Tuesday
Mostly sunny, with a high near 72. Light southwest wind becoming west 5 to 9 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Mostly sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Mostly sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Union City CA
 37.63°N 122.06°W (Elev. 187 ft)
Last Update:
2:33 am PDT Aug 17, 2025
Forecast Valid:
9am PDT Aug 17, 2025-6pm PDT Aug 23, 2025
 
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