• Tonight

    May 23

    Lo 49°

    Increasing amounts of clouds

    Ragweed Pollen Weather
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
  • Sun

    May 24

    72°Lo 51°

    Low clouds, then sun

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Mon

    May 25

    69°Lo 52°

    Low clouds, then sun and cool

    Low ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Tue

    May 26

    67°Lo 50°

    Partly sunny and cool

    Low ragweed pollen levels
    • Precip
      3%
    • Wind
      Speed
      12 mph
    • Cloud
      Cover
      60%
    more
  • Wed

    May 27

    74°Lo 51°

    Mostly sunny and pleasant

    Ragweed Pollen Weather
    • Precip
      1%
    • Wind
      Speed
      10 mph
    • Cloud
      Cover
      24%
    more
Next Previous
Hi 68° RealFeel® 70° Precipitation 4%

Day

N

E

S

W

  • SW 9 mph
  • Gusts: 20 mph

Cool with clouds giving way to some sun

  • Max UV Index: 6 (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 49° RealFeel® 49° Precipitation 1%

Night

N

E

S

W

  • WSW 6 mph
  • Gusts: 13 mph

Partly cloudy this evening followed by low clouds

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

Napa Pollen Levels - May 23

  • Extreme
  • Very High
  • High
  • Moderate
  • Low
  • Grass

    Pollen

    Low

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    Moderate

  • Mold

    Pollen

    Low

Temperature History - May 23

more Historical Weather Data >
  Today Normal Record 5/23/2014
High 68° 77° 99° (1943) 74°
Low 49° 51° 36° (1949) 49°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:51 AM with 14:29 of sunlight, then sets at 8:20 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:09 AM with 13:46 of moolight, then sets at 12:55 AM

Napa Weather Report

San Francisco: Cool, Cloudy Weather to Linger for Holiday Weekend

May 23, 2015; 6:17 PM ET

More clouds and cooler weather can be expected across the Bay Area through the holiday weekend and into the new week. more >

Sat. Pollen

Sat. Dust & Dander

Sat. Wind Maps