Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

57°F

14°C

Humidity	87%
Wind Speed	N 0 MPH
Barometer	30.02 in (1016.59 mb)
Dewpoint	54°F (12°C)
Visibility	10.00 mi
Last update	04 Jul 10:00 AM PDT

More Information:

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

Extended Forecast for

4 Miles E Saint Helena CA

Independence Day
High: 86 °F
Sunny
Tonight
Low: 53 °F
Partly Cloudy
then Patchy
Fog
Sunday
High: 80 °F
Patchy Fog
then Sunny
Sunday Night
Low: 51 °F
Mostly Clear
then Patchy
Fog
Monday
High: 83 °F
Areas Fog
then Sunny
Monday Night
Low: 50 °F
Clear then
Areas Fog
Tuesday
High: 84 °F
Areas Fog
then Sunny
Tuesday Night
Low: 51 °F
Mostly Clear
then Patchy
Fog
Wednesday
High: 90 °F
Areas Fog
then Sunny

Detailed Forecast

Independence Day

Sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the afternoon.

Tonight

Patchy fog after 5am. Otherwise, increasing clouds, with a low around 53. South southwest wind around 5 mph becoming calm in the evening.

Sunday

Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 80. Calm wind becoming south around 6 mph in the afternoon.

Sunday Night

Patchy fog after 1am. Otherwise, increasing clouds, with a low around 51. Southwest wind around 5 mph becoming calm in the evening.

Monday

Areas of fog before 9am. Otherwise, mostly sunny, with a high near 83. Calm wind becoming southwest around 6 mph in the afternoon.

Monday Night

Areas of fog after 1am. Otherwise, mostly clear, with a low around 50.

Tuesday

Areas of fog before 9am. Otherwise, mostly sunny, with a high near 84.

Tuesday Night

Patchy fog after 2am. Otherwise, mostly clear, with a low around 51.

Wednesday

Areas of fog before 7am. Otherwise, sunny, with a high near 90.