• Today

    Sep 4

    78°Lo 47°

    Sunny; breezy this afternoon

    Beneficial weather for migraines
    • Hi
      RealFeel
      76°
    • UV
      5 - High
    • Cloud
      Cover
      5%
  • Sat

    Sep 5

    83°Lo 48°

    Mostly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      83°
    • UV
      5 - High
    • Cloud
      Cover
      11%
    more
  • Sun

    Sep 6

    86°Lo 51°

    Plenty of sunshine

    Beneficial weather for migraines
    • Hi
      RealFeel
      86°
    • UV
      5 - High
    • Cloud
      Cover
      5%
    more
  • Mon

    Sep 7

    89°Lo 53°

    Plenty of sunshine

    Beneficial weather for migraines
    • Hi
      RealFeel
      89°
    • UV
      5 - High
    • Cloud
      Cover
      9%
    more
  • Tue

    Sep 8

    87°Lo 54°

    Areas of low clouds, then sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      87°
    • UV
      5 - High
    • Cloud
      Cover
      43%
    more
Next Previous
Hi 78° RealFeel® 76° Precipitation 2%

Day

N

E

S

W

  • SW 15 mph
  • Gusts: 23 mph

Sunny; breezy this afternoon

  • 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 47° RealFeel® 48° Precipitation 3%

Night

N

E

S

W

  • WNW 6 mph
  • Gusts: 16 mph

Mostly clear and cool

  • 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

Temperature History - Sep 4

more Historical Weather Data >
  Today Normal Record 9/4/2014
High 78° 84° 105° (1950) 81°
Low 47° 54° 42° (1932) 57°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:41 AM with 12:54 of sunlight, then sets at 7:35 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:57 PM with 14:25 of moolight, then sets at 2:22 PM

Napa Weather Report

San Francisco: Pleasant Stretch Continues Through Labor Day

September 4, 2015; 10:12 AM ET

As a ridge moves in from the west over the weekend and early next week, high temperatures will swing back above normal. more >

Fri. Migraine Headache

Fri. UV Index