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

Severe Thunderstorms for the Center of the Nation; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

72°F

22°C

Humidity 17%
Wind Speed NNE 4 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 17 Apr 01:20 PM PDT
Extended Forecast for

Napa CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 73. North northwest wind around 6 mph becoming west southwest.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 76. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 48. Southwest wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 71. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 71 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 48. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Slight Chance
    Showers

  • Monday

    Monday: Showers likely, mainly after 11am. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Rain likely. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 49.

    Low: 49 °F

    Rain Likely
    and Patchy
    Fog

  • Tuesday

    Tuesday: Rain likely, then showers and possibly a thunderstorm after 11am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 61.

    High: 61 °F

    Showers and
    Patchy Fog

Detailed Forecast

This Afternoon
Sunny, with a high near 73. North northwest wind around 6 mph becoming west southwest.
Tonight
Partly cloudy, with a low around 43. Calm wind.
Saturday
Mostly sunny, with a high near 76. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 48. Southwest wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 71. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Sunday Night
A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 48. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers likely, mainly after 11am. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Monday Night
Rain likely. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 49.
Tuesday
Rain likely, then showers and possibly a thunderstorm after 11am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 61.
Tuesday Night
A chance of rain. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 45.
Wednesday
A chance of rain. Patchy fog. Otherwise, mostly sunny, with a high near 65.
Wednesday Night
Patchy fog. Otherwise, mostly clear, with a low around 43.
Thursday
Patchy fog. Otherwise, sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
Last Update:
1:26 pm PDT Apr 17, 2026
Forecast Valid:
1pm PDT Apr 17, 2026-6pm PDT Apr 23, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation