Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

84°F

29°C

Humidity 35%
Wind Speed WSW 17 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 25 Jul 04:20 PM PDT
Extended Forecast for

4 Miles E Saint Helena CA

  • Tonight

    Tonight: Patchy fog after 5am.  Otherwise, mostly clear, with a low around 54. West southwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 54 °F

    Clear then
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 7am.  Otherwise, partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 5am.  Otherwise, increasing clouds, with a low around 53. West southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 53 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 7am.  Otherwise, partly sunny, then gradually becoming sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 90 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. West southwest wind around 6 mph becoming calm  in the evening.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 57.

    Low: 57 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 56.

    Low: 56 °F

    Clear

Detailed Forecast

Tonight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 54. West southwest wind 5 to 8 mph becoming calm in the evening.
Sunday
Patchy fog before 7am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Sunday Night
Patchy fog after 5am. Otherwise, increasing clouds, with a low around 53. West southwest wind 5 to 7 mph becoming calm in the evening.
Monday
Patchy fog before 7am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 55. West southwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 93.
Tuesday Night
Clear, with a low around 57.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Clear, with a low around 56.
Thursday
Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny and hot, with a high near 97.
Friday Night
Clear, with a low around 57.
Saturday
Sunny and hot, with a high near 99.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
1:25 pm PDT Jul 25, 2026
4pm PDT Jul 25, 2026-6pm PDT Aug 1, 2026
 
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Additional Resources

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