Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™

O'Fallon, MO

34°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Missouri

34°
No results found.
Try searching for a city, zip code or point of interest.
Create Account Unlock extended daily forecasts and additional saved locations — all with your free account.
Let's Go Chevron right
Have an account already? Login
settings
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
Sunday, January 11

Current Weather

11:24 AM

34°F
Sunny
RealFeel® 38°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
RealFeel Shade™ 32°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
RealFeel®
38°
RealFeel Shade™
32°
Max UV Index
2.3 (Low)
Wind
NW 5 mph
Wind Gusts
10 mph
Humidity
53%
Indoor Humidity
29% (Very Dry)
Dew Point
18° F
Pressure
↑ 30.56 in
Cloud Cover
0%
Visibility
18 mi
Cloud Ceiling
40000 ft

Day

1/11
39°Hi
RealFeel® 38°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
RealFeel Shade™ 32°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
Breezy this morning; otherwise, mostly sunny

Max UV Index2.0 (Low)

AccuLumen Brightness Index™9 (Very Bright)

WindWNW 10 mph

Wind Gusts23 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover9%

Morning

Afternoon

Night

1/11
28°Lo
RealFeel® 24°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
Clear

WindSW 7 mph

Wind Gusts13 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover0%

Evening

Overnight

Sun & Moon

9 hrs 41 mins
Rise 7:19 AM
Set 5:00 PM
Waning Crescent
Rise 1:04 AM
Set 11:39 AM

Temperature History

1/11
High
Low
Forecast
39°
28°
Average
40°
24°
Last Year
36°
28°

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Winter Weather

Two coastal storms could deliver snow to parts of Northeast this week

3 hours ago

Winter Weather

Plunging temps, snow signal return of typical January winter weather

23 minutes ago

Astronomy

NASA to bring Crew-11 astronauts home early after medical issue aboard...

1 day ago

Weather Forecasts

Heavy rain, snowmelt to raise flood risk from Alaska to Washington

12 minutes ago

Winter Weather

Storm Goretti sweeps United Kingdom, France with winds over 120 mph

1 day ago

 More Stories

Featured Stories

Astronomy

Newly discovered asteroid spins at record-breaking speed

2 days ago

Astronomy

Meteor showers 2026: The best nights to see shooting stars

2 days ago
Live Blog

Waves in the sky? Rare clouds dazzle in California

LATEST ENTRY

Kelvin-Helmholtz wave clouds appear in California

1 day ago

Weather News

Families face complex challenges 1 year after Eaton, Palisades fires

4 days ago

Astronomy

Hubble telescope spots ‘failed’ starless galaxy known as Cloud 9

4 days 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 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
© 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

...

...

...