For Business
|
Warnings
Data Suite
Forensics
Advertising
Superior Accuracy™

Severe storms on repeat for Plains to mid-Atlantic this week. See the timing.

A new heat dome is set to expand across the central and eastern US. Click for the forecast.

Grass Lake, IL

Location

Location News Videos

Use Current Location

Recent

Grass Lake

Illinois

No results found.

Try searching for a city, zip code or point of interest.

Create Your Account Unlock extended daily and hourly forecasts — all with your free account.

Have an account already? Log In

settings

Grass Lake, IL 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

Hourly

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

View hourly forecasts 10-days ahead

Activate Your Premium+ Subscription

5 PM

92°

RealFeel® 96°

Hot

RealFeel Guide

Hot

90° to 100°

Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.

6%

Mostly sunny

RealFeel Shade™93°

Heat Index96°

WindSW 8 mph

Air QualityPoor

Max UV Index3.4 (Moderate)

Wind Gusts12 mph

Humidity44%

Indoor Humidity44% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

90°

RealFeel® 94°

Hot

RealFeel Guide

Hot

90° to 100°

Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.

6%

Mostly sunny

RealFeel Shade™91°

Heat Index94°

WindSW 8 mph

Air QualityPoor

Max UV Index2.2 (Low)

Wind Gusts12 mph

Humidity49%

Indoor Humidity49% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

88°

RealFeel® 91°

Hot

RealFeel Guide

Hot

90° to 100°

Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.

6%

Mostly sunny

RealFeel Shade™89°

Heat Index92°

WindSW 8 mph

Air QualityPoor

Max UV Index1.3 (Low)

Wind Gusts10 mph

Humidity54%

Indoor Humidity54% (Very Humid)

Dew Point69° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

84°

RealFeel® 86°

Very Warm

RealFeel Guide

Very Warm

82° to 89°

Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.

7%

Intermittent clouds

RealFeel Shade™86°

Heat Index88°

WindSW 7 mph

Air QualityPoor

Max UV Index0.4 (Low)

Wind Gusts8 mph

Humidity59%

Indoor Humidity59% (Very Humid)

Dew Point69° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover55%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

81°

RealFeel® 83°

Very Warm

RealFeel Guide

Very Warm

82° to 89°

Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.

7%

Intermittent clouds

Heat Index84°

WindSW 6 mph

Air QualityPoor

Wind Gusts7 mph

Humidity67%

Indoor Humidity67% (Very Humid)

Dew Point69° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover66%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

77°

RealFeel® 79°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

6%

Intermittent clouds

WindSW 6 mph

Air QualityFair

Wind Gusts6 mph

Humidity75%

Indoor Humidity75% (Very Humid)

Dew Point69° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover70%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

74°

RealFeel® 76°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

5%

Intermittent clouds

WindSW 6 mph

Air QualityFair

Wind Gusts6 mph

Humidity84%

Indoor Humidity84% (Very Humid)

Dew Point69° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover70%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for Grass Lake

AccuWeather's hourly forecast for Grass Lake provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 92° with a RealFeel® of 96°, mostly sunny with a 6% chance of precipitation. Each hourly forecast includes wind speed, humidity, air quality, UV index, and the AccuLumen Brightness Index™, AccuWeather's measure of perceived outdoor light intensity. Forecasts are generated by proprietary systems developed by AccuWeather meteorologists since 1962.

Further Ahead

Tomorrow

Friday

10-Day

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Next heat dome to bring 100 F heat to Midwest; perhaps East again

2 hours ago

Severe Weather

Tireless severe storms to repeat from Plains to mid-Atlantic

1 hour ago

Hurricane

Atlantic hurricane season off to a slow start as El Niño strengthens

2 hours ago

Weather Forecasts

Downpours may rapidly elevate flash flood risk centered on Kentucky

2 hours ago

Live: World Cup 2026 weather updates

LATEST ENTRY

Quarterfinals to commence with heat on Thursday

1 day ago

Featured Stories

Super Typhoon Bavi leaves trail of destruction

7 hours ago 0:36

Recreation

Neil the Seal returns to Tasmania

1 hour ago

Weather News

At least 750 structures destroyed by Colorado wildfire, images show

2 hours ago

Weather News

Toll from Venezuela earthquakes rises to 3,342, more than 16K injured

1 day ago

World North America United States Illinois Grass Lake

Weather Near Grass Lake:

Chicago, IL
Joliet, IL
Naperville, IL

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

...

...

...