Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Partly Cloudy

66°F

19°C

Humidity 63%
Wind Speed SSW 13 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 31 Aug 01:20 PM PDT
Extended Forecast for

2 Miles NNW Vallejo CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 69. Southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. West southwest wind 11 to 15 mph, with gusts as high as 23 mph.

    Low: 56 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 67. West southwest wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 67 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 56. West southwest wind 6 to 11 mph becoming light  after midnight. Winds could gust as high as 20 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 69. Light southwest wind increasing to 6 to 11 mph in the morning.

    High: 69 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain, mainly before 11am.  Mostly cloudy, with a high near 68.

    High: 68 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 69. Southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Tonight
Mostly cloudy, with a low around 56. West southwest wind 11 to 15 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 67. West southwest wind 9 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
Increasing clouds, with a low around 56. West southwest wind 6 to 11 mph becoming light after midnight. Winds could gust as high as 20 mph.
Wednesday
Partly sunny, with a high near 69. Light southwest wind increasing to 6 to 11 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
A 30 percent chance of rain, mainly before 11am. Mostly cloudy, with a high near 68.
Thursday Night
Partly cloudy, with a low around 56.
Friday
Mostly sunny, with a high near 72.
Friday Night
Mostly clear, with a low around 55.
Saturday
Mostly sunny, with a high near 73.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Vallejo CA
 38.16°N 122.25°W (Elev. 26 ft)
1:26 pm PDT Aug 31, 2026
1pm PDT Aug 31, 2026-6pm PDT Sep 6, 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