Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Resurgence of severe weather to jolt the central US this week. See the forecast. Chevron right

O'Fallon, MO

63°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Missouri

63°
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.
Let's Go Chevron right
Have an account already? Log In
settings
Help
O'Fallon, MO 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, March 12

Day

3/12
57°Hi
RealFeel® 56°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
RealFeel Shade™ 53°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
Plenty of sunshine

Max UV Index5.0 (Moderate)

AccuLumen Brightness Index™9 (Very Bright)

WindWSW 9 mph

Wind Gusts18 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover8%

Morning

Afternoon

Night

3/12
47°Lo
RealFeel® 37°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
Partly cloudy and breezy

WindSSW 15 mph

Wind Gusts25 mph

Probability of Precipitation3%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover45%

Evening

Overnight

Sun & Moon

11 hrs 48 mins
Rise 7:17 AM
Set 7:05 PM
Waning Crescent
Rise 3:34 AM
Set 12:28 PM

Temperature History

3/12
High
Low
Forecast
57°
47°
Average
55°
35°
Last Year
78°
32°

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Severe Weather

Central US to face renewed threat for severe storms, tornadoes

2 hours ago

Severe Weather

Michigan's deadly EF3 tornado among state's earliest on record

17 hours ago

Weather News

Louisiana rocked by 4 earthquakes days after strongest quake in decade...

19 hours ago

Weather Forecasts

Fresh surge of storms to renew flood threat in central US this week

2 hours ago

Winter Weather

When does winter cold really end in your city?

3 days ago

 More Stories

Featured Stories

Weather News

Indiana just changed the law for rescuing pets trapped in hot cars

15 hours ago

Recreation

25-year-old becomes 1st American woman to row solo across Atlantic

3 days ago

Recreation

When will DC cherry blossoms reach peak bloom? 2026 forecast released

4 days ago

Recreation

Death Valley’s best superbloom since 2016 is here

5 days ago

Weather News

Louisiana rocked by 4 earthquakes days after strongest quake in decade...

19 hours ago
World North America United States Missouri 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 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

...

...

...