National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

77°F

25°C

Humidity 57%
Wind Speed SSW 9 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 21 Mar 02:20 PM PDT
Extended Forecast for

5 Miles W Napa Co. Airport CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 81. West wind 8 to 10 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 48. West wind 5 to 8 mph becoming calm after midnight.

    Low: 48 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, sunny, with a high near 77. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 77 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 47. West southwest wind around 6 mph becoming calm in the evening.

    Low: 47 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 81. West wind 8 to 10 mph.
Tonight
Mostly clear, with a low around 48. West wind 5 to 8 mph becoming calm after midnight.
Sunday
Patchy fog before 8am. Otherwise, sunny, with a high near 77. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 47. West southwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 77. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Mostly sunny, with a high near 78.
Wednesday Night
Partly cloudy, with a low around 47.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 48.
Friday
Partly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles W Napa Co. Airport CA
 38.21°N 122.38°W (Elev. 3 ft)
Last Update:
2:07 pm PDT Mar 21, 2026
Forecast Valid:
2pm PDT Mar 21, 2026-6pm PDT Mar 27, 2026
 
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Additional Resources

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