Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
See where freezes are a concern for the Northeast, Midwest. Click here. Chevron right

O'Fallon, MO

66°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Missouri

66°
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 10-Day 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 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities
Sunday, April 19

Day

4/19
66°Hi
RealFeel® 70°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
RealFeel Shade™ 64°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Breezy with sunshine; a nice end to the weekend

Max UV Index8.0 (Very High)

AccuLumen Brightness Index™9 (Very Bright)

WindW 10 mph

Wind Gusts30 mph

Probability of Precipitation2%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover6%

Morning

Afternoon

Night

4/19
40°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 chilly

WindNE 7 mph

Wind Gusts12 mph

Probability of Precipitation6%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover41%

Evening

Overnight

Sun & Moon

13 hrs 22 mins
Rise 6:21 AM
Set 7:43 PM
Waxing Crescent
Rise 7:24 AM
Set 11:02 PM

Temperature History

4/19
High
Low
Forecast
66°
40°
Average
69°
45°
Last Year
64°
53°

Further Ahead

Hourly

10-Day

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Winter Weather

Cars are emerging from a massive snow pile months after winter storms

3 days ago

Winter Weather

Grab the jackets again as cold air, freezes return to the Northeast

1 hour ago

Weather Forecasts

Storm to bring California more rain, thunder and Sierra Nevada snow

2 hours ago

Severe Weather

Renewed risk for severe thunderstorms across the Plains

1 hour ago

Severe Weather

1st lightning death of 2026 reported after Wisconsin storm

2 days ago

 More Stories

Featured Stories

Astronomy

Lyrids 2026: How to see the 1st meteor shower since January

3 hours ago

Weather News

Evacuations, rescues underway as flooding continues in Wisconsin, Mich...

2 days ago

Weather News

Falling ice chunk crashes through roof, lands on living room couch

3 days ago

Weather News

7-month-old dies after being found in hot car in Tennessee

2 days ago

Weather News

114 years later: How weather helped seal the Titanic’s fate

4 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

...

...

...