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

Severe Thunderstorms in Portions of the Mississippi Valley and Great Lakes

A few severe thunderstorms with large hail, are expected across parts of the middle and upper Mississippi River Valley tonight through early morning. Snow and a wintry mix overnight in the Upper Midwest into the Great Lakes can cause hazardous travel conditions. Fire weather concerns continue for a large portion of the central and southern High Plains and Four Corners region this evening. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Rain

55°F

13°C

Humidity 93%
Wind Speed NNW 3 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 54°F (12°C)
Visibility 7.00 mi
Last update 31 Mar 03:20 AM PDT
Extended Forecast for

Napa CA

  • Overnight

    Overnight: A 10 percent chance of rain after 5am. Cloudy, with a steady temperature around 54. Calm wind.

    Low: 54 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: A 50 percent chance of rain. Mostly cloudy, with a high near 66. Calm wind becoming south southwest 5 to 8 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 66 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain between 10pm and 1am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 48. Southwest wind around 6 mph becoming calm in the evening.

    Low: 48 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: Rain likely, mainly after 11am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 62. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Rain Likely
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: Rain. Low around 42. Southwest wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Rain

  • Thursday

    Thursday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 45.

    Low: 45 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Overnight
A 10 percent chance of rain after 5am. Cloudy, with a steady temperature around 54. Calm wind.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 66. Calm wind becoming south southwest 5 to 8 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A 20 percent chance of rain between 10pm and 1am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 48. Southwest wind around 6 mph becoming calm in the evening.
Wednesday
Rain likely, mainly after 11am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 62. Light south southwest wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain. Low around 42. Southwest wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Sunny, with a high near 66.
Thursday Night
Clear, with a low around 45.
Friday
Sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 46.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 49.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Napa CA
 38.29°N 122.29°W (Elev. 20 ft)
Last Update:
1:26 am PDT Mar 31, 2026
Forecast Valid:
3am PDT Mar 31, 2026-6pm PDT Apr 6, 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