1 - 5 of 45 days | All 45 days
Next 5 Days
  • Early AM

    Sep 18

    A couple of showers Lo 60°
    more
  • Today

    Sep 18

    Mostly cloudy, showers around 69°Lo 59°
  • Fri

    Sep 19

    Considerable cloudiness 72°Lo 55°
    more
  • Sat

    Sep 20

    Sunshine and patchy clouds 74°Lo 56°
    more
  • Sun

    Sep 21

    Mostly sunny and warmer 84°Lo 61°
    more
< Previous 8 hours Next 8 hours >
  Thu
2am
3am 4am 5am 6am 7am 8am 9am
  2am 3am 4am 5am 6am 7am 8am 9am
Forecast
Showers
Cloudy
Showers
Cloudy
Cloudy
Showers
Cloudy
Showers
Temp (°F) 62° 62° 61° 61° 61° 60° 61° 62°
RealFeel® 60° 60° 59° 60° 59° 58° 60° 60°
Humidity 82% 82% 83% 84% 85% 86% 88% 87%
   
  2am 3am 4am 5am 6am 7am 8am 9am
Rain
 
63%
 
49%
 
63%
 
49%
 
47%
 
51%
 
49%
 
58%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  2am 3am 4am 5am 6am 7am 8am 9am
Wind (mph) 3 NNW 3 NNW 3 NNW 3 E 2 SE 2 SSE 3 S 3 S
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 97% 98% 95% 97% 95% 92% 100% 99%
Dew Point 57° 56° 56° 56° 56° 56° 58° 58°
Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - Sep 18

more Historical Weather Data >
  Today Normal Record 9/18/2013
High 69° 70° 85° (1991) 70°
Low 59° 52° 38° (1947) 56°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:50 AM with 12:25 of sunlight, then sets at 7:15 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:31 AM with 14:53 of moolight, then sets at 4:24 PM

Top Story

Mercer Island Weather Report

Seattle: Cooler Weather to Fade for Weekend Heat

September 17, 2014; 3:20 PM ET

After a stretch of above-normal high temperatures, cooler, more seasonable weather is expected in Seattle for the remainder of the week, but it will be short-lived as heat returns to the region this weekend. more >