Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
LIVE: State of emergencies declared as 200M face massive winter storm. See the latest. Chevron right
Biggest snowstorm in years to bury areas from Oklahoma to New York. See the latest snow forecast. Chevron right

O'Fallon, MO

8°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Missouri

8°
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 WinterCast

Hourly

 Daily Radar MinuteCast® Monthly Air Quality Health & Activities

View hourly forecasts 10-days ahead

Activate Your Premium+ Subscription

Chevron right

WinterCast

6 - 10 in

Sat, 1/24, 5:00 AM - Sun, 1/25, 3:00 PM

Snow

10 AM

9°
RealFeel® -11°
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
Mostly cloudy

RealFeel Shade™-12°

WindN 16 mph

Air QualityFair

Max UV Index1.1 (Low)

Wind Gusts22 mph

Humidity41%

Indoor Humidity10% (Extremely Dry)

Dew Point-10° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover86%

Visibility10 mi

Cloud Ceiling17200 ft

11 AM

10°
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
Cloudy

RealFeel Shade™-12°

WindN 16 mph

Air QualityFair

Max UV Index1.1 (Low)

Wind Gusts22 mph

Humidity33%

Indoor Humidity8% (Dangerously Dry)

Dew Point-15° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover94%

Visibility10 mi

Cloud Ceiling17700 ft

12 PM

10°
RealFeel® -9°
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
Cloudy

RealFeel Shade™-11°

WindN 16 mph

Air QualityFair

Max UV Index1.3 (Low)

Wind Gusts23 mph

Humidity27%

Indoor Humidity7% (Dangerously Dry)

Dew Point-19° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling18200 ft

1 PM

10°
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
Mostly cloudy

RealFeel Shade™-10°

WindN 15 mph

Air QualityFair

Max UV Index1.7 (Low)

Wind Gusts23 mph

Humidity24%

Indoor Humidity7% (Dangerously Dry)

Dew Point-20° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling22100 ft

2 PM

10°
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
Mostly cloudy

RealFeel Shade™-10°

WindN 15 mph

Air QualityFair

Max UV Index1.7 (Low)

Wind Gusts24 mph

Humidity23%

Indoor Humidity6% (Dangerously Dry)

Dew Point-21° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling29900 ft

3 PM

9°
RealFeel® -8°
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 cloudy

RealFeel Shade™-10°

WindN 15 mph

Air QualityFair

Max UV Index1.2 (Low)

Wind Gusts24 mph

Humidity23%

Indoor Humidity6% (Dangerously Dry)

Dew Point-22° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling29900 ft

4 PM

8°
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
Mostly cloudy

RealFeel Shade™-10°

WindNNE 14 mph

Air QualityFair

Max UV Index0.6 (Low)

Wind Gusts24 mph

Humidity23%

Indoor Humidity6% (Dangerously Dry)

Dew Point-23° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling29900 ft

5 PM

7°
RealFeel® -11°
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
Mostly cloudy

RealFeel Shade™-11°

WindNNE 13 mph

Air QualityExcellent

Max UV Index0.0 (Low)

Wind Gusts23 mph

Humidity24%

Indoor Humidity6% (Dangerously Dry)

Dew Point-23° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling22000 ft

6 PM

5°
RealFeel® -11°
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
Mostly cloudy

WindNNE 12 mph

Air QualityExcellent

Wind Gusts21 mph

Humidity26%

Indoor Humidity6% (Dangerously Dry)

Dew Point-23° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover80%

Visibility10 mi

Cloud Ceiling18100 ft

7 PM

7°
RealFeel® -8°
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 7%
Chevron down
Cloudy

WindNNE 12 mph

Air QualityExcellent

Wind Gusts18 mph

Humidity28%

Indoor Humidity7% (Dangerously Dry)

Dew Point-20° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover93%

Visibility10 mi

Cloud Ceiling18200 ft

8 PM

6°
RealFeel® -9°
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 7%
Chevron down
Cloudy

WindNNE 10 mph

Air QualityFair

Wind Gusts17 mph

Humidity31%

Indoor Humidity7% (Dangerously Dry)

Dew Point-19° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover98%

Visibility10 mi

Cloud Ceiling18200 ft

9 PM

5°
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 7%
Chevron down
Cloudy

WindNNE 10 mph

Air QualityFair

Wind Gusts15 mph

Humidity32%

Indoor Humidity7% (Dangerously Dry)

Dew Point-19° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling18200 ft

10 PM

4°
RealFeel® -11°
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 7%
Chevron down
Cloudy

WindNE 10 mph

Air QualityFair

Wind Gusts15 mph

Humidity34%

Indoor Humidity7% (Dangerously Dry)

Dew Point-19° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling15400 ft

11 PM

3°
RealFeel® -12°
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 7%
Chevron down
Cloudy

WindNE 10 mph

Air QualityFair

Wind Gusts14 mph

Humidity37%

Indoor Humidity7% (Dangerously Dry)

Dew Point-18° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling12600 ft

Further Ahead

Tomorrow

Sunday

Daily

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Winter Weather

Massive snowstorm to bury areas from Oklahoma City to NYC, Boston

21 minutes ago
Live Blog

Winter storm updates: Storm to unleash dangerous impacts for 200M

LATEST ENTRY

Natural gas prices surge ahead of Arctic outbreak

29 minutes ago

Winter Weather

Ice storm threatens Texas to Virginia with massive power outages

26 minutes ago

Winter Weather

Texas braces for major winter storm with cold not seen since 2021

20 hours ago

Winter Weather

Severe cold may lead to days of dangerous conditions

2 hours ago

 More Stories

Featured Stories

Astronomy

Webb reveals stunning new lava-like details inside Helix Nebula

21 hours ago

Weather News

Deadly wildfires burned across southern Chile amid extreme heat and wi...

2 days ago

Astronomy

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

1 day ago

Weather News

Four shark attacks in two days. Why Australia’s beaches are dangerous

2 days ago

Travel

Second rail tragedy rocks Spain, as passenger train derails

2 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

...

...

...