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

Late January Extreme Cold; Watching for Another East Coast Storm Threat This Weekend

Well below normal temperatures will continue for the eastern half of the Lower 48 this week. Another blast of arctic air will spread from the Plains through the East/Southeast Friday into Saturday with more record lows expected even into Florida. Forecasts are being monitored for increasing potential of another significant winter storm to impact the eastern United States this coming weekend. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

38°F

3°C

Humidity 96%
Wind Speed NNE 4 MPH
Barometer 30.26 in (1024.72 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 27 Jan 05:54 AM PST
Extended Forecast for

4 Miles E Saint Helena CA

  • Today

    Today: Rain likely after 4pm. Patchy fog between 8am and 9am. Otherwise, increasing clouds, with a high near 58. Light and variable wind becoming south 11 to 16 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Patchy Fog
    then Rain
    Likely

  • Tonight

    Tonight: Rain likely, mainly before 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 44. South wind 5 to 10 mph becoming light and variable. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 44 °F

    Rain Likely
    and Patchy
    Fog then
    Chance Rain
    and Areas Fog

  • Wednesday

    Wednesday: Areas of fog before 11am. Otherwise, mostly sunny, with a high near 60. North northeast wind 8 to 13 mph.

    High: 60 °F

    Areas Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog. Otherwise, partly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Patchy Fog

  • Thursday

    Thursday: Mostly sunny, with a high near 64. Calm wind.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

Detailed Forecast

Today
Rain likely after 4pm. Patchy fog between 8am and 9am. Otherwise, increasing clouds, with a high near 58. Light and variable wind becoming south 11 to 16 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain likely, mainly before 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 44. South wind 5 to 10 mph becoming light and variable. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Areas of fog before 11am. Otherwise, mostly sunny, with a high near 60. North northeast wind 8 to 13 mph.
Wednesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 41. Calm wind.
Thursday
Mostly sunny, with a high near 64. Calm wind.
Thursday Night
Mostly cloudy, with a low around 43.
Friday
Partly sunny, with a high near 64.
Friday Night
Mostly cloudy, with a low around 43.
Saturday
Partly sunny, with a high near 66.
Saturday Night
A slight chance of rain after 10pm. Mostly cloudy, with a low around 46.
Sunday
A chance of rain. Partly sunny, with a high near 64.
Sunday Night
A slight chance of rain. Patchy fog. Otherwise, partly cloudy, with a low around 44.
Monday
Patchy fog. Otherwise, mostly sunny, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Saint Helena CA
 38.5°N 122.4°W (Elev. 476 ft)
Last Update:
2:38 am PST Jan 27, 2026
Forecast Valid:
6am PST Jan 27, 2026-6pm PST Feb 2, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation