• Early AM

    Apr 17

    Lo 50°

    Clear

    Dust & Dander Weather
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Today

    Apr 17

    71°Lo 49°

    Low clouds, then some sun

    Low indoor dust & dander levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Fri

    Apr 18

    70°Lo 47°

    Partly sunny

    Low indoor dust & dander levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Sat

    Apr 19

    69°Lo 42°

    Mostly sunny

    Low indoor dust & dander levels
    • Precip
      1%
    • Wind
      Speed
      9 mph
    • Cloud
      Cover
      20%
    more
  • Sun

    Apr 20

    75°Lo 44°

    Partly sunny and pleasant

    Low indoor dust & dander levels
    • Precip
      0%
    • Wind
      Speed
      4 mph
    • Cloud
      Cover
      27%
Next Previous
Hi 75° RealFeel® 77° Precipitation 0%

Day

N

E

S

W

  • NW 4 mph
  • Gusts: 10 mph

Partly sunny and pleasant

  • Max UV Index: 7 (High)
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 44° RealFeel® 39° Precipitation 1%

Night

N

E

S

W

  • W 6 mph
  • Gusts: 9 mph

Mainly clear and chilly

  • Max UV Index: N/A
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Apr 20

more Historical Weather Data >
  Today Normal Record 4/20/2013
High 75° 69° 94° (1931) 80°
Low 44° 42° 29° (1933) 42°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:27 AM with 13:23 of sunlight, then sets at 7:50 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:33 AM with 10:21 of moolight, then sets at 10:54 AM

Top Story

Napa Weather Report

San Francisco: No Rain in Sight, Morning Clouds to Break for Afternoon Sunshine

April 16, 2014; 6:56 PM ET

For the remainder of the week and into the weekend, morning clouds will give way to mostly sunny skies. more >

Is it a Cold or the Flu?

Apr 7, 2014; 5:00 AM ET Symptoms caused by the common cold can often resemble those associated with the influenza virus, so how do you differentiate between the two?

Sun. Dust & Dander

Sun. Wind Maps