Severe Weather Possible from the Central Plains to the Northeast; Building Heat in the West; Fire Weather Concerns for the Southwest

Severe thunderstorms will be possible from the central Plains to the Mid-Atlantic and Northeast on Monday. Hazardous heat will linger across the southern U.S. and build across the West through mid-week. Hot and dry conditions will fuel fire weather concerns for Interior Alaska and the Four Corners region through Monday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Overcast

55°F

13°C

Humidity 93%
Wind Speed W 9 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 53°F (12°C)
Visibility 7.00 mi
Last update 22 Jun 02:54 AM PDT
Extended Forecast for

3 Miles N Hercules CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 54. Southwest wind around 10 mph.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 72. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 72 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 54. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 73. West southwest wind 7 to 10 mph.

    High: 73 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 54. Southwest wind 8 to 11 mph.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 54. Southwest wind around 10 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 72. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Monday Night
Increasing clouds, with a low around 54. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 73. West southwest wind 7 to 10 mph.
Tuesday Night
Mostly clear, with a low around 54. Southwest wind 8 to 11 mph.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Sunny, with a high near 74.
Thursday Night
Mostly clear, with a low around 56.
Friday
Mostly sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 57.
Saturday
Sunny, with a high near 73.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Hercules CA
 38.05°N 122.25°W (Elev. 56 ft)
1:26 am PDT Jun 22, 2026
3am PDT Jun 22, 2026-6pm PDT Jun 28, 2026
 
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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