Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075° N Lon: 122.27944° W Elev: 33.0 ft.

Overcast

56°F

13°C

Humidity 90%
Wind Speed NNW 3 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 20 Sep 04:54 AM PDT
Detailed forecast for

North Bay Interior Mountains

Rest Of Tonight
Mostly cloudy. Lows in the mid 50s to lower 60s. Light winds.
Sunday
Mostly cloudy. Highs in the upper 60s to lower 80s. East winds up to 5 mph...becoming south around 5 mph in the afternoon.
Sunday Night
Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 50s to lower 60s. Light winds.
Monday
Mostly cloudy in the morning then becoming sunny. Highs in the upper 60s to mid 80s. Light winds...becoming southwest 5 to 10 mph in the afternoon.
Monday Night
Mostly clear. Lows in the 50s. Southwest winds 5 to 10 mph in the evening...becoming light.
Tuesday
Sunny. Highs in the lower 70s to mid 80s.
Tuesday Night And Wednesday
Mostly clear. Lows in the mid 50s to lower 60s. Highs in the 80s.
Wednesday Night
Partly cloudy. Lows in the mid 60s.
Thursday
Sunny. Highs in the 80s to lower 90s.
Thursday Night And Friday
Partly cloudy. Lows in the mid 60s. Highs in the 70s to mid 80s.
Friday Night And Saturday
Mostly clear. Lows around 60. Highs in the 70s to lower 80s.



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302 AM PDT Sun Sep 20 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database