Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Overcast

55°F

13°C

Humidity	93%
Wind Speed	SSW 12 MPH
Barometer	29.84 in (1010.5 mb)
Dewpoint	54°F (12°C)
Visibility	9.00 mi
Last update	01 Jul 12:35 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

Overnight
Low: 51 °F
Fog
Wednesday
High: 84 °F
Fog then
Sunny
Wednesday Night
Low: 50 °F
Mostly Clear
then Fog
Thursday
High: 81 °F
Fog then
Sunny
Thursday Night
Low: 50 °F
Clear then
Fog
Friday
High: 86 °F
Areas Fog
then Sunny
Friday Night
Low: 53 °F
Clear then
Patchy Fog
Independence Day
High: 87 °F
Patchy Fog
then Sunny
Saturday Night
Low: 53 °F
Mostly Clear
then Patchy
Fog

Detailed Forecast

Overnight

Widespread fog, mainly after 4am. Otherwise, partly cloudy, with a low around 51. Calm wind.

Wednesday

Widespread fog before 7am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming south around 6 mph in the afternoon.

Wednesday Night

Widespread fog, mainly after 5am. Otherwise, increasing clouds, with a low around 50. South wind around 5 mph becoming calm in the evening.

Thursday

Widespread fog, mainly before 7am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 81. Calm wind becoming south southwest around 6 mph in the afternoon.

Thursday Night

Widespread fog, mainly after 3am. Otherwise, mostly clear, with a low around 50. South southwest wind around 6 mph becoming calm in the evening.

Friday

Areas of fog before 8am. Otherwise, sunny, with a high near 86.

Friday Night

Patchy fog after 3am. Otherwise, mostly clear, with a low around 53.

Independence Day

Patchy fog before 7am. Otherwise, sunny, with a high near 87.

Saturday Night

Patchy fog after 3am. Otherwise, mostly clear, with a low around 53.

Sunday

Patchy fog before 7am. Otherwise, mostly sunny, with a high near 84.