• Today

    Jul 30

    83°Lo 58°

    Low clouds, then sun

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Fri

    Jul 31

    80°Lo 59°

    Low clouds, then some sun

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
  • Sat

    Aug 1

    79°Lo 58°

    Low clouds, then some sun

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Sun

    Aug 2

    81°Lo 55°

    Low clouds, then sun

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Mon

    Aug 3

    78°Lo 54°

    Low clouds followed by sun

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
Hi 80° RealFeel® 81° Precipitation 25%

Day

N

E

S

W

  • SW 13 mph
  • Gusts: 21 mph

Low clouds followed by some sun; breezy in the afternoon

  • Max UV Index: 7 (High)
  • Thunderstorms: 11%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 59° RealFeel® 56° Precipitation 3%

Night

N

E

S

W

  • WSW 9 mph
  • Gusts: 17 mph

Partly cloudy in the evening; low clouds late

  • Max UV Index: N/A
  • Thunderstorms: 2%
  • 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 - July 31

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

    Low

  • Ragweed Pollen

    Low

  • Tree Pollen

    Low

  • Mold Pollen

    Low

Temperature History - Jul 31

more Historical Weather Data >
  Today Normal Record 7/31/2014
High 80° 82° 102° (1993) 84°
Low 59° 55° 41° (1924) 56°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:10 AM with 14:10 of sunlight, then sets at 8:20 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:28 PM with 11:13 of moolight, then sets at 7:41 AM

Napa Weather Report

San Francisco: Comfortable Conditions to End July

July 30, 2015; 4:31 AM ET

A pattern of cooler and seasonable weather will enter the city of San Francisco through the end of July and into the early part of August. more >

Fri. Pollen

Fri. Dust & Dander

Fri. Wind Maps