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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

Livermore, Livermore Municipal Airport (KLVK)

Lat: 37.69278°NLon: 121.81444°WElev: 397.0ft.

Partly Cloudy

63°F

17°C

Humidity 77%
Wind Speed WSW 10 MPH
Barometer 30.01 in (1016.26 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 18 Aug 12:05 AM PDT
Extended Forecast for

5 Miles E Union City CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 54. West southwest wind 9 to 11 mph.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 73. West wind 7 to 10 mph, with gusts as high as 21 mph.

    High: 73 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73. West wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 54. West southwest wind 9 to 11 mph.
Monday
Mostly cloudy through mid morning, then gradual clearing, with a high near 73. West wind 7 to 10 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 53. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.
Tuesday
Sunny, with a high near 73. West wind 6 to 9 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 53. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 58.
Friday
Sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles E Union City CA
 37.6°N 121.93°W (Elev. 161 ft)
Last Update:
1:26 pm PDT Aug 17, 2025
Forecast Valid:
12am PDT Aug 18, 2025-6pm PDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation