• Today

    Aug 4

    76°Lo 57°

    Low clouds, then some sun

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

    Aug 5

    80°Lo 55°

    Low clouds, then sunshine

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

    Aug 6

    80°Lo 57°

    Low clouds breaking

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

    Aug 7

    77°Lo 55°

    Low clouds breaking

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

    Aug 8

    78°Lo 55°

    Mostly sunny

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Partly Sunny
Partly Cloudy
Mostly Cloudy
Cloudy
Cloudy
Partly Sunny
Partly Sunny
Partly Sunny
Temp (°F) 62° 66° 69° 71° 73° 73° 76° 74°
RealFeel® 66° 69° 73° 75° 75° 76° 77° 74°
Humidity 77% 67% 62% 57% 56% 54% 50% 54%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
7%
 
7%
 
7%
 
7%
 
7%
 
7%
 
7%
 
7%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 6 W 7 W 9 W 10 W 12 W 15 WSW 16 SSW 16 SSW
UV Index 2 4 5 6 6 7 5 4
Cloud Cover 42% 65% 87% 95% 95% 45% 45% 45%
Dew Point 55° 55° 56° 56° 56° 56° 56° 57°
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 - Aug 4

more Historical Weather Data >
  Today Normal Record 8/4/2014
High 76° 82° 106° (1998) 75°
Low 57° 55° 46° (1949) 57°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:13 AM with 14:03 of sunlight, then sets at 8:16 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:08 PM with 13:11 of moolight, then sets at 12:19 PM

Napa Weather Report

San Francisco: Seasonable Conditions to Persist Through Week

August 4, 2015; 4:44 AM ET

Dry and seasonable conditions will continue across the San Francisco Bay area this week. more >

Tue. Pollen

Tue. Dust & Dander

Tue. Wind Maps