Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
1 million without power amid biggest winter storm in 5 years. See the latest storm updates. Chevron right

O'Fallon, MO

10°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Missouri

10°
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

View hourly forecasts 10-days ahead

Activate Your Premium+ Subscription

Chevron right

8 PM

8°
RealFeel® -5°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear

WindNW 9 mph

Air QualityFair

Wind Gusts17 mph

Humidity73%

Indoor Humidity16% (Extremely Dry)

Dew Point1° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover26%

Visibility10 mi

Cloud Ceiling34000 ft

9 PM

4°
RealFeel® -7°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Partly cloudy

WindNW 8 mph

Air QualityFair

Wind Gusts15 mph

Humidity79%

Indoor Humidity15% (Extremely Dry)

Dew Point-1° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover46%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

1°
RealFeel® -10°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Partly cloudy

WindNW 8 mph

Air QualityFair

Wind Gusts13 mph

Humidity78%

Indoor Humidity13% (Extremely Dry)

Dew Point-5° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover46%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

-3°
RealFeel® -13°
Frigid
RealFeel Guide
Frigid
-24° to -11°
Caution advised. Frostbite to exposed skin within 8 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Partly cloudy

WindWNW 7 mph

Air QualityFair

Wind Gusts10 mph

Humidity85%

Indoor Humidity12% (Extremely Dry)

Dew Point-6° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover46%

Visibility10 mi

Cloud Ceiling30000 ft

Further Ahead

Tomorrow

Tuesday

Daily

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Live Blog

Winter storm updates: 1 million without power, travel shut down

LATEST ENTRY

Why is it so quiet after a snowstorm?

36 minutes ago

Winter Weather

Arctic air, more snow follow mega winter storm in Northeast, Midwest

4 hours ago

Tornado rips roof off home in DeFuniak Springs

5 hours ago 0:54

Winter Weather

Frigid nights to deepen the hardship after ice storm in southern US

4 hours ago

Winter Weather

Rare ‘avalanche’ blocks Pennsylvania road during major snowstorm

59 minutes ago

 More Stories

Featured Stories

Astronomy

Webb reveals stunning new lava-like details inside Helix Nebula

3 days ago

Travel

Uruguay to build world's 1st electrified biogas-to-aviation fuel plant

2 days ago

Weather News

Scientists find unlikely new way to track space junk

2 days ago

Astronomy

NASA astronaut Suni Williams retires months after return from troubled...

4 days ago

Astronomy

Webb reveals stunning new lava-like details inside Helix Nebula

3 days ago
World North America United States Missouri O'Fallon

Weather Near O'Fallon:

  • St. Charles, MO
  • St. Louis, MO
  • St. Peters, 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

...

...

...