Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Fall Foliage Forecast: See where vibrant colors are expected in autumn. Chevron right
Catastrophic flash flood sweeps through Nepal. Click for the latest. Chevron right

Crystal Lake, IL

66°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Crystal Lake

Illinois

66°
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
Crystal 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
Today Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities
Thursday, August 27

Day

8/27
80°Hi
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.
LEARN MORE
RealFeel Shade™ 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Mostly sunny

Max UV Index7.0 (High)

AccuLumen Brightness Index™9 (Very Bright)

WindNW 8 mph

Wind Gusts17 mph

Probability of Precipitation25%

Probability of Thunderstorms6%

Precipitation0.00 in

Cloud Cover21%

Morning

Afternoon

Night

8/27
58°Lo
RealFeel® 59°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
Mostly clear; good viewing conditions for the lunar eclipse

WindENE 4 mph

Wind Gusts6 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover11%

Evening

Overnight

Sun & Moon

13 hrs 23 mins
Rise 6:13 AM
Set 7:36 PM
Full Moon
Rise 7:26 PM
Set 6:38 AM

Temperature History

8/27
High
Low
Forecast
80°
58°
Average
81°
62°
Last Year
76°
51°
Record
97°
2024
47°
2015

Further Ahead

Hourly

10-Day

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Fall foliage forecast 2026: Where to expect the best color in the US

20 hours ago

Severe Weather

Hundreds missing after massive flood wave on China-Nepal border

12 hours ago

Hurricane

Could a tropical wave beat the odds and become 'Dolly?'

15 hours ago

Weather Forecasts

Los Angeles heat wave may extend to last weekend of August

14 hours ago

Climate

Global ocean heat breaks record months after its usual peak

19 hours ago

 More Stories

Featured Stories

Weather News

Ross Fire doubles to 80,000 acres, destroys structures

15 hours ago

Astronomy

Best lunar eclipse for the US until 2029 arrives Thursday night

12 hours ago

Astronomy

NASA’s Roman Space Telescope set to launch Sunday

13 hours ago

Weather News

Heavy rains hit vulnerable communities after Venezuela earthquakes

17 hours ago

Weather News

Salmonella cases from jalapeno peppers reach 431 across 32 states

5 days ago
World North America United States Illinois Crystal Lake

Weather Near Crystal 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

...

...

...