Rapid Warm-Up Forecast Across Much of the Lower 48 Today and Tuesday

Most of the U.S. starts the week calm and unseasonably warm. The Heartland will be warmest, with highs 25–30° above average. Only the Gulf Coast stays chilly. Rain today is limited to western Washington while lake effect snow continues east of Lake Ontario. Cooler air returns after Tuesday, bringing a wintry mix to the Midwest and Northeast by Wednesday. Read More >

Hazardous Weather Conditions

Cold Weather Advisory in effect from January 12, 01:00 AM PST until January 12, 09:00 AM PST

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

35°F

2°C

Humidity	95%
Wind Speed	N 0 MPH
Barometer	30.34 in (1027.43 mb)
Dewpoint	34°F (1°C)
Visibility	10.00 mi
Last update	12 Jan 06:54 AM PST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles E Saint Helena CA

Cold Weather Advisory until January 12, 09:00am

Click here for hazard details and duration

...

Cold Weather Advisory until January 12, 09:00am
NOW until 9:00am Mon
Cold Weather Advisory
Today
High: 61 °F
Sunny
Tonight
Low: 40 °F
Mostly Clear
Tuesday
High: 63 °F
Sunny
Tuesday Night
Low: 40 °F
Mostly Clear
Wednesday
High: 64 °F
Sunny
Wednesday Night
Low: 44 °F
Mostly Clear
Thursday
High: 65 °F
Sunny
Thursday Night
Low: 45 °F
Mostly Clear