• Tonight

    Sep 18

    Lo 45°

    Mainly clear

    Hair Frizz Weather
    • Wind
      Gust
      26 mph
    • Precip
      50%
    • Hours of Precip
      0.5
  • Fri

    Sep 19

    80°Lo 46°

    Mostly sunny and warmer

    Unlikely for hair frizz
    • Wind
      Gust
      9 mph
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Sat

    Sep 20

    84°Lo 48°

    A t-storm around in the p.m.

    Unlikely for hair frizz
    • Wind
      Gust
      7 mph
    • Precip
      40%
    • Hours of Precip
      0.5
    more
  • Sun

    Sep 21

    82°Lo 47°

    Sun mixing with clouds; warm

    Unlikely for hair frizz
    • Wind
      Gust
      4 mph
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Mon

    Sep 22

    82°Lo 45°

    Plenty of sun

    Unlikely for hair frizz
    • Wind
      Gust
      8 mph
    • Precip
      1%
    • Hours of Precip
      0
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
5pm
6pm 7pm 8pm 9pm 10pm 11pm Fri
12am
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Forecast
Showers
Partly Cloudy
Partly Sunny
Partly Cloudy
Partly Cloudy
Partly Cloudy
Mostly Clear
Mostly Clear
Temp (°F) 67° 65° 63° 59° 56° 55° 53° 51°
RealFeel® 64° 60° 58° 55° 53° 53° 52° 51°
Humidity 45% 48% 52% 62% 67% 70% 72% 73%
   
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Rain
 
51%
 
47%
 
29%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Wind (mph) 11 S 12 SW 10 WSW 7 NNW 5 NE 4 NNE 3 NNE 2 NNE
UV Index 1 0 0 0 0 0 0 0
Cloud Cover 55% 63% 42% 48% 48% 37% 27% 22%
Dew Point 46° 45° 45° 47° 45° 45° 44° 43°
Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F

Temperature History - Sep 18

more Historical Weather Data >
  Today Normal Record 9/18/2013
High 68° 75° 86° (1984) 72°
Low 45° 43° 34° (1978) 49°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:46 AM with 12:20 of sunlight, then sets at 7:06 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:43 AM with 14:16 of moolight, then sets at 3:59 PM

Top Story

Portola Weather Report

San Francisco: Sunshine, Seasonable Temperatures to Continue

September 18, 2014; 4:37 PM ET

The Bay Area will continue to feature sunshine and seasonable temperatures as the summer season comes to a close. 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.

Thu. Hair Frizz

Thu. Wind Maps

Thu. UV Index