• Fri

    Jul 31

    84°Lo 61°

    Sunshine

    Hair Frizz Weather
    • Wind
      Gust
      13 mph
    • Precip
      10%
    • Hours of Precip
      0
  • Sat

    Aug 1

    84°Lo 65°

    Sunshine

    Hair Frizz Weather
    • Wind
      Gust
      13 mph
    • Precip
      10%
    • Hours of Precip
      0
    more
  • Sun

    Aug 2

    92°Lo 56°

    Mostly sunny and warm

    Hair Frizz Weather
    • Wind
      Gust
      13 mph
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Mon

    Aug 3

    90°Lo 55°

    Sunshine

    Hair Frizz Weather
    • Wind
      Gust
      12 mph
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Tue

    Aug 4

    90°Lo 56°

    Abundant sunshine

    Hair Frizz Weather
    • Wind
      Gust
      12 mph
    • Precip
      0%
    • Hours of Precip
      0
    more
Next Previous
Hi 84° RealFeel® 90° Precipitation 10%

Day

N

E

S

W

  • WSW 4 mph
  • Gusts: 13 mph

Sunshine

  • Max UV Index: 8 (Very 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 61° RealFeel® 61° Precipitation 5%

Night

N

E

S

W

  • W 5 mph
  • Gusts: 13 mph

Clear

  • 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 - Jul 31

more Historical Weather Data >
  Today Normal Record 7/31/2014
High 84° N/A N/A 100°
Low 61° N/A N/A 65°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:09 AM with 14:07 of sunlight, then sets at 8:16 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:25 PM with 11:14 of moolight, then sets at 7:39 AM

Tracy Weather Report

San Francisco: Cooler, Comfortable Conditions to Start Week

July 6, 2015; 1:57 PM ET

The San Francisco area will remain cool and comfortable into the early part of the upcoming workweek. more >

The History Behind the UV Index

Nov 12, 2012; 5:00 AM ET The UV index has been around since the early 1990s. It was created to help you plan outdoor activities in hopes to limit overexposure to the sun. Jeannette Calle has more.