• Tonight

    Sep 1

    Lo 56°

    Increasing cloudiness

    Home Energy Efficiency Weather
    • Avg
      RealFeel
      64°
    • Hi
      RealFeel
      75°
    • Wind
      Speed
      13 mph
  • Wed

    Sep 2

    78°Lo 52°

    Areas of low clouds, then sun

    Poor for home energy
    • Avg
      RealFeel
      63°
    • Hi
      RealFeel
      76°
    • Wind
      Speed
      14 mph
    more
  • Thu

    Sep 3

    77°Lo 50°

    Areas of low clouds, then sun

    Poor for home energy
    • Avg
      RealFeel
      63°
    • Hi
      RealFeel
      76°
    • Wind
      Speed
      12 mph
    more
  • Fri

    Sep 4

    76°Lo 50°

    Areas of low clouds, then sun

    Poor for home energy
    • Avg
      RealFeel
      63°
    • Hi
      RealFeel
      76°
    • Wind
      Speed
      12 mph
    more
  • Sat

    Sep 5

    80°Lo 51°

    Clouds breaking for sun

    Poor for home energy
    • Avg
      RealFeel
      66°
    • Hi
      RealFeel
      81°
    • Wind
      Speed
      9 mph
    more
Next Previous
Hi 74° RealFeel® 75° Precipitation 1%

Day

N

E

S

W

  • SSW 13 mph
  • Gusts: 23 mph

After a cloudy start, sunshine returns; a refreshing breeze this afternoon

  • Max UV Index: 6 (High)
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 56° RealFeel® 53° Precipitation 1%

Night

N

E

S

W

  • WSW 7 mph
  • Gusts: 18 mph

Increasing cloudiness

  • 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 - Sep 1

more Historical Weather Data >
  Today Normal Record 9/1/2014
High 74° 84° 107° (1955) 91°
Low 56° 54° 44° (1957) 52°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:39 AM with 13:00 of sunlight, then sets at 7:39 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:44 PM with 13:29 of moolight, then sets at 11:13 AM

Napa Weather Report

San Francisco: Sunny Skies, Pleasant Conditions to Last Into Labor Day Weekend

September 2, 2015; 12:27 AM ET

Sunny skies and seasonable conditions will follow low clouds each day through Saturday in the Bay Area. more >

Energy Efficient Lightbulbs and S.A.D

Sep 8, 2012; 5:00 AM ET With shorter days and colder nights in the fall and winter, some people develop seasonal affective disorder. When shopping for lightbulbs to treat the 'winter blues,'consider energy-efficient bulbs.

Tue. Home Energy Efficiency

Tue. Degree Days

Tue. UV Index