Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Polar vortex is on the move. Click to see what it means for North America. Chevron right
Pineapple Express headed to California, the Southwest. See the forecast. Chevron right

Mercer Island, WA

47°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Mercer Island

Washington

47°
No results found.
Try searching for a city, zip code or point of interest.
Get Premium+
Create Your Account Unlock extended daily and hourly forecasts — all with your free account.
Let's Go Chevron right
Have an account already? Log In
settings
Help
Mercer Island, WA Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel

For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center

Today

Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Today's Weather

Sat, Oct 31

A blend of sun and clouds Hi: 57°

Tonight: Mostly cloudy; patchy fog will reduce visibility late; remember to set clocks back one hour Lo: 40°

Current Weather

12:49 PM

47°F
RealFeel® 54°
Partly sunny More Details
RealFeel Shade™ 48°
Wind NNW 2 mph
Wind Gusts 4 mph
Air Quality Fair

Looking Ahead

Patchy fog will affect the area from late tonight into tomorrow morning

Mercer Island Weather Radar

Mercer Island Weather Radar
Static Radar Temporarily Unavailable
Thank you for your patience as we work to get everything up and running again.
Refresh Page
Clouds
Temperature

Hourly Weather

1 PM 50°
rain drop 13%
2 PM 53°
rain drop 0%
3 PM 55°
rain drop 0%
4 PM 57°
rain drop 0%
5 PM 55°
rain drop 0%
6 PM 53°
rain drop 0%
7 PM 50°
rain drop 0%
8 PM 49°
rain drop 0%
9 PM 47°
rain drop 0%
10 PM 45°
rain drop 0%
11 PM 45°
rain drop 0%
12 AM 44°
rain drop 0%

10-Day Weather Forecast

Today

10/31

57° 40°

A blend of sun and clouds

Night: Mainly cloudy; fog late

25%

Sun

11/1

56° 35°

Fog in the morning

Partly cloudy and chilly

2%

Mon

11/2

55° 44°

Intervals of clouds and sun

Cloudy

4%

Tue

11/3

61° 40°

Increasing amounts of sun

Partly cloudy

11%

Wed

11/4

60° 47°

Mostly cloudy

Partly cloudy

25%

Thu

11/5

57° 46°

Mainly cloudy

Cloudy most of the time

25%

Fri

11/6

56° 44°

Rain and drizzle in the a.m.

Cloudy most of the time

73%

Sat

11/7

55° 48°

Mostly cloudy

Turning cloudy, a shower late

2%

Sun

11/8

56° 46°

Periods of rain

Cloudy

62%

Mon

11/9

55° 46°

A bit of morning rain

A little rain early; clearing

57%

Sun & Moon

10 hrs 02 mins
Rise 7:51 AM
Set 5:53 PM
Waning Gibbous
Rise 10:57 PM
Set 1:44 PM

Air Quality

See More
Air Quality Fair

The air quality is generally acceptable for most individuals. However, sensitive groups may experience minor to moderate symptoms from long-term exposure.

Allergy Outlook

See All
Tree Pollen Low Data is not supported in this location Ragweed Pollen Low Data is not supported in this location Mold Low Data is not supported in this location Grass Pollen Low Data is not supported in this location Dust & Dander High Data is not supported in this location

Top Stories

Weather Forecasts

Pineapple express to rain buckets, renew flash flooding in Southwest

33 minutes ago

Travel

Erosion threatens California’s PCH as Newsom orders El Niño preps

3 days ago

Weather Forecasts

No frigid air coming to U.S. despite polar vortex being on the move

3 hours ago

Severe Weather

Severe storms threaten Plains, Election Day plans

29 minutes ago

Weather Forecasts

Election Day weather: Rain, storms could complicate trips to polls

3 hours ago

More Stories

Featured Stories

Weather News

New daylight saving time bill takes different approach to time changes

1 day ago

Weather News

Secret to more fireflies next summer is hiding under fallen leaves

1 day ago

Winter Weather

5 East Coast ski areas to check out this winter, from an expert

1 day ago

Weather News

4 struck by lightning at El Mirage Elementary in Arizona

1 day ago

Weather News

Drought uncovers Colorado historic highway as water reservoir shrinks

3 days ago

World North America United States Washington Mercer Island

Weather Near Mercer Island:

  • Bellevue, WA
  • Seattle, WA
  • Tacoma, WA
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...