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

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

37°F

3°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 37°F (3°C)
Visibility 7.00 mi
Last update 27 Dec 03:20 AM PST
Extended Forecast for

2 Miles NW Vallejo CA

  • Overnight

    Overnight: A 20 percent chance of rain. Partly cloudy, with a low around 44. West northwest wind around 6 mph.

    Low: 44 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 51. North northwest wind around 6 mph.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 38. Light north northwest wind.

    Low: 38 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing, with a high near 51. Northeast wind 3 to 7 mph.

    High: 51 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37. Northeast wind around 6 mph.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Patchy frost before 7am. Otherwise, sunny, with a high near 52.

    High: 52 °F

    Patchy Frost
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of rain. Partly cloudy, with a low around 44. West northwest wind around 6 mph.
Saturday
Mostly sunny, with a high near 51. North northwest wind around 6 mph.
Saturday Night
Increasing clouds, with a low around 38. Light north northwest wind.
Sunday
Mostly cloudy through mid morning, then gradual clearing, with a high near 51. Northeast wind 3 to 7 mph.
Sunday Night
Mostly clear, with a low around 37. Northeast wind around 6 mph.
Monday
Patchy frost before 7am. Otherwise, sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Sunny, with a high near 52.
Tuesday Night
Mostly clear, with a low around 37.
Wednesday
Mostly sunny, with a high near 51.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 40.
New Year's Day
A chance of rain. Cloudy, with a high near 50.
Thursday Night
A chance of rain. Cloudy, with a low around 43.
Friday
A chance of rain. Partly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Vallejo CA
 38.16°N 122.25°W (Elev. 26 ft)
Last Update:
12:27 am PST Dec 27, 2025
Forecast Valid:
3am PST Dec 27, 2025-6pm PST Jan 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation