National Weather Service United States Department of Commerce

Unseasonably cold temperatures spreading into central U.S.

A strong cold front will usher a much colder air mass into the central and eastern U.S. for the end of the work week. Temperatures will be 10 to 20 degrees below average in some areas. Rain and snow will be possible across the Great Lakes on Friday as the system crosses the area. Heavy snow is possible in the central Appalachians Friday night.
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Current Conditions

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Napa CA

7 Day Forecast

Overnight

Chance Rain Chance for Measurable Precipitation 40%

Chance
Rain

Low: 11 °C

Friday

Rain Chance for Measurable Precipitation 90%

Rain

High: 19 °C

Friday
Night

Chance Showers Chance for Measurable Precipitation 50%

Chance
Showers

Low: 7 °C

Saturday

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

High: 19 °C

Saturday
Night

Patchy Fog

Patchy
Fog

Low: 6 °C

Sunday

Patchy Fog

Patchy
Fog

High: 21 °C

Sunday
Night

Mostly Clear

Mostly
Clear

Low: 7 °C

Monday

Sunny

Sunny

High: 22 °C

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 6 °C

Detailed Forecast

  • Overnight A 40 percent chance of rain. Cloudy, with a low around 11. South southwest wind 8 to 11 km/h.
  • Friday Rain likely, then showers and possibly a thunderstorm after noon. High near 19. South wind 11 to 14 km/h becoming west southwest in the afternoon. Chance of precipitation is 90%.
  • Friday Night A chance of showers and thunderstorms. Some of the storms could produce small hail. Cloudy, with a low around 7. West wind 9 to 14 km/h becoming light and variable in the evening. Chance of precipitation is 50%.
  • Saturday A 30 percent chance of showers. Partly sunny, with a high near 19. West wind around 14 km/h.
  • Saturday Night Patchy fog after midnight. Otherwise, partly cloudy, with a low around 6. West southwest wind 11 to 13 km/h becoming north after midnight.
  • Sunday Patchy fog before noon. Otherwise, sunny, with a high near 21.
  • Sunday Night Mostly clear, with a low around 7.
  • Monday Sunny, with a high near 22.
  • Monday Night Partly cloudy, with a low around 6.
  • Tuesday Mostly sunny, with a high near 23.
  • Tuesday Night Mostly clear, with a low around 9.
  • Wednesday Sunny, with a high near 24.
  • Wednesday Night Mostly clear, with a low around 9.
  • Thursday Sunny, with a high near 23.