• Tonight

    Jul 30

    Lo 53°

    Increasing cloudiness

    Asthma Weather
    • Hi
      RealFeel
      78°
    • UV
      7 - Very High
    • Air Qual.
      Good
    more
  • Sun

    Jul 31

    84°Lo 53°

    Plenty of sunshine

    Beneficial weather for asthma
    • Hi
      RealFeel
      86°
    • UV
      7 - Very High
    • Air Qual.
      Good
  • Mon

    Aug 1

    85°Lo 52°

    Plenty of sunshine

    Beneficial weather for asthma
    • Hi
      RealFeel
      87°
    • UV
      7 - Very High
    • Air Qual.
      Good
    more
  • Tue

    Aug 2

    87°Lo 54°

    Mostly sunny

    Beneficial weather for asthma
    • Hi
      RealFeel
      90°
    • UV
      7 - Very High
    • Air Qual.
      Good
    more
  • Wed

    Aug 3

    88°Lo 52°

    Warm with plenty of sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      92°
    • UV
      7 - Very High
    • Air Qual.
      Good
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Sunny
Sunny
Sunny
Temp (°F) 61° 66° 71° 76° 79° 82° 83° 84°
RealFeel® 65° 71° 77° 82° 84° 86° 86° 86°
Humidity 75% 62% 57% 53% 46% 42% 39% 38%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
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Snow
 
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Ice
 
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  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 6 WSW 6 WSW 6 WSW 8 WSW 9 SW 10 SW 10 WSW 12 WSW
UV Index 3 4 6 7 8 7 6 4
Cloud Cover 10% 10% 10% 10% 10% 1% 0% 0%
Dew Point 53° 53° 55° 58° 57° 57° 56° 56°
Middle Grid line 85 F Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F

Temperature History - Jul 31

more Historical Weather Data >
  Today Normal Record 7/31/2015
High 84° 86° N/A 76°
Low 53° 52° N/A 59°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:11 AM with 14:08 of sunlight, then sets at 8:19 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:04 AM with 14:33 of moolight, then sets at 6:37 PM

Napa Weather Report

Western US: Diminishing heat to aid in firefighting efforts this week

July 30, 2016; 11:48 PM ET

As several large fires continue to rage across the western United States, weather conditions will gradually improve for firefighting efforts this week. more >

Sun. Air Quality

Sun. Asthma Risk

Sun. UV Index