Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Get your umbrellas: Rain to drench Southern California. See the forecast. Chevron right
Nor'easter to churn off East Coast this week. Click for the details. Chevron right

Alton, IL

52°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Alton

Illinois

52°
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
Alton, 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
Tuesday, October 20

Day

10/20
73°Hi
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
RealFeel Shade™ 71°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Mostly sunny and beautiful

Max UV Index4.0 (Moderate)

AccuLumen Brightness Index™9 (Very Bright)

WindSE 5 mph

Wind Gusts6 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover11%

Morning

Afternoon

Night

10/20
43°Lo
RealFeel® 44°
Chilly
RealFeel Guide
Chilly
40° to 52°
Jacket or sweater is recommended.
LEARN MORE
Clear

WindE 4 mph

Wind Gusts5 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover7%

Evening

Overnight

Sun & Moon

11 hrs 00 mins
Rise 7:15 AM
Set 6:15 PM
Waxing Gibbous
Rise 3:31 PM
Set 2:17 AM

Temperature History

10/20
High
Low
Forecast
73°
43°
Average
66°
46°
Last Year
73°
40°

Further Ahead

Hourly

10-Day

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Storm to bring renewed flood risk to California, Southwest

34 minutes ago

Astronomy

A meteor shower linked to Halley’s Comet peaks Wednesday night

16 hours ago

Weather News

Slow-moving nor'easter to spread gusty winds to Northeast coast

35 minutes ago

Weather News

New nor’easter washes over NC 12 weeks after road was reconstructed

15 hours ago

Hurricane

Another East Pacific storm brewing, eyeing the southern Mexican shore

25 minutes ago

 More Stories

Featured Stories

Climate

El Niño is making days on Earth slightly longer

14 hours ago

Climate

Could saving summer snow change the future of skiing?

18 hours ago

Weather News

Dog rescued after 50 hours alone in Alaska wilderness

3 days ago

Weather News

Shrinking Lake Mead exposed a barrel; murder victim is now identified

3 days ago

Weather News

Cause of death revealed for Jackie, Big Bear's beloved bald eagle

4 days ago
World North America United States Illinois Alton

Weather Near Alton:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
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

...

...

...