Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Imelda becomes a hurricane off the Southeast coast. Get the forecast. Chevron right

O'Fallon, IL

64°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Illinois

64°
No results found.
Try searching for a city, zip code or point of interest.
settings
O'Fallon, IL Weather
Today WinterCast Local {stormName} Tracker Hourly Daily 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 Daily Radar MinuteCast® Monthly Air Quality Health & Activities
Thursday, October 9

Day

10/9
77°Hi
RealFeel® 82°
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™ 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Mostly sunny

Max UV Index4.0 (Moderate)

AccuLumen Brightness Index™9 (Very Bright)

WindN 1 mph

Wind Gusts6 mph

Probability of Precipitation1%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover23%

Morning

Afternoon

Night

10/9
58°Lo
RealFeel® 59°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
Mainly clear

WindS 2 mph

Wind Gusts10 mph

Probability of Precipitation1%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover29%

Evening

Overnight

Sun & Moon

11 hrs 28 mins
Rise 7:03 AM
Set 6:31 PM
Waning Gibbous
Rise 7:56 PM
Set 11:31 AM

Temperature History

10/9
High
Low
Forecast
77°
58°
Average
75°
47°
Last Year
79°
46°
Record
91°
1980
28°
2000

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Hurricane

Coastal flooding, rough surf to be Hurricane Imelda's main US threats

7 hours ago

Hurricane

5 more homes collapse into the ocean on North Carolina's Outer Banks

7 hours ago

Weather Forecasts

Expansive dry air to intensify drought across central, eastern US

10 hours ago

Hurricane

Humberto to storm the U.K. after brushing Bermuda this week

12 hours ago

Astronomy

Super Harvest Moon, 2 meteor showers to light up October nights

1 day ago

 More Stories

Featured Stories

Travel

6 scenic fall drives where you can get your foliage fix this year

2 days ago

Weather News

Namibia sends in army to fight devastating wildfire in Etosha game res...

1 day ago

Hurricane

A year after Hurricane Helene, Florida, Appalachians still bear scars

5 days ago

Severe Weather

Parents of girls killed in Texas camp flooding say ‘commonsense’ measu...

5 days ago

Severe Weather

Strong lightning strike destroys New Zealand radar

5 days ago
World North America United States Illinois O'Fallon

Weather Near O'Fallon:

  • 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 RealFeel® and RealFeel Shade™ 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 RealFeel® and RealFeel Shade™ 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
© 2025 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

...

...

...