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.

Mostly Cloudy

62°F

17°C

Humidity 80%
Wind Speed W 8 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 17 Aug 08:54 AM PDT
Extended Forecast for

2 Miles SSE Union City CA

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 70. West wind 7 to 15 mph, with gusts as high as 21 mph.

    High: 70 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Increasing clouds, with a low around 58. West wind 6 to 14 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 73. West wind 5 to 10 mph, with gusts as high as 18 mph.

    High: 73 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 56. West wind 9 to 14 mph becoming light west southwest after midnight. Winds could gust as high as 21 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 73. Light southwest wind becoming west 5 to 10 mph in the afternoon.

    High: 73 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 70. West wind 7 to 15 mph, with gusts as high as 21 mph.
Tonight
Increasing clouds, with a low around 58. West wind 6 to 14 mph, with gusts as high as 21 mph.
Monday
Mostly cloudy through mid morning, then gradual clearing, with a high near 73. West wind 5 to 10 mph, with gusts as high as 18 mph.
Monday Night
Increasing clouds, with a low around 56. West wind 9 to 14 mph becoming light west southwest after midnight. Winds could gust as high as 21 mph.
Tuesday
Mostly sunny, with a high near 73. Light southwest wind becoming west 5 to 10 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 57.
Wednesday
Mostly sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 85.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Union City CA
 37.57°N 121.98°W (Elev. 43 ft)
Last Update:
2:33 am PDT Aug 17, 2025
Forecast Valid:
9am PDT Aug 17, 2025-6pm PDT Aug 23, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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