Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Severe weather outbreak, strong tornadoes expected through Monday. Get the details. Chevron right
Rain is coming for the drought-stricken Southeast. See how it will impact wildfire conditions. Chevron right

O'Fallon, MO

61°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Missouri

61°
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

Tonight's Weather

Sat, Apr 25

Partly cloudy Lo: 52°

Tomorrow: Periods of clouds and sunshine Hi: 80°

Current Weather

11:59 PM

61°F
RealFeel® 62°
Mostly cloudy More Details
Wind ENE 2 mph
Wind Gusts 6 mph
Air Quality Fair

Looking Ahead

A tornado outbreak along with large hail and damaging winds can occur Monday and Monday night

O'Fallon Weather Radar

O'Fallon Weather Radar
Static Radar Temporarily Unavailable
Thank you for your patience as we work to get everything up and running again.
Refresh Page
Clouds
Temperature

Hourly Weather

12 AM 61°
rain drop 0%
1 AM 58°
rain drop 0%
2 AM 57°
rain drop 0%
3 AM 56°
rain drop 0%
4 AM 54°
rain drop 0%
5 AM 53°
rain drop 0%
6 AM 52°
rain drop 0%
7 AM 54°
rain drop 0%
8 AM 56°
rain drop 0%
9 AM 62°
rain drop 0%
10 AM 66°
rain drop 0%
11 AM 69°
rain drop 0%

10-Day Weather Forecast

Tonight

4/25

52° Lo

Partly cloudy

2%

Sun

4/26

80° 63°

Clouds and sun

Night: Cloudy and warm
8%

Mon

4/27

83° 52°

Thunderstorms, some severe

A dangerous evening t-storm
96%

Tue

4/28

68° 46°

Cooler with periods of sun

A couple of evening showers
25%

Wed

4/29

67° 43°

Mostly sunny

Clear and chilly
21%

Thu

4/30

67° 44°

Some brightening

Partly cloudy and chilly
18%

Fri

5/1

62° 39°

Mostly cloudy and cool

Partly cloudy and chilly
22%

Sat

5/2

67° 45°

Times of clouds and sun

Mainly clear
1%

Sun

5/3

73° 46°

Plenty of sunshine

Mainly clear
1%

Mon

5/4

71° 46°

Mostly cloudy

Rain and a thunderstorm late
25%

Sun & Moon

13 hrs 36 mins
Rise 6:13 AM
Set 7:49 PM
Waxing Gibbous
Rise 2:01 PM
Set 3:43 AM

Air Quality

See More
Air Quality Fair

The air quality is generally acceptable for most individuals. However, sensitive groups may experience minor to moderate symptoms from long-term exposure.

Allergy Outlook

See All
Tree Pollen Very High Data is not supported in this location Ragweed Pollen Low Data is not supported in this location Mold Low Data is not supported in this location Grass Pollen Low Data is not supported in this location Dust & Dander High Data is not supported in this location

Top Stories

Severe Weather

Severe outbreak, threat of strong tornadoes to intensify into Monday

9 hours ago

Weather Forecasts

Rain forecast for Southeast, but won’t end drought, wildfire concerns

10 hours ago

Severe Weather

EF4 tornado devastates Enid, Oklahoma amid Thursday's severe weather

1 day ago

Severe Weather

Twister sisters: 'Satellite tornado' amazes storm chaser in Oklahoma

1 day ago

Weather News

Georgia in state of emergency as wildfires destroy homes amid drought

1 day ago

 More Stories

Featured Stories

Weather Forecasts

Spring setback to deliver some rain, more chill to Northeast

10 hours ago

Severe Weather

Historic Great Lakes flooding shoves ice chunks into Michigan homes

4 days ago

Severe Weather

Illinois leads nation in tornado, hail and wind reports so far in 2026

5 days ago

Astronomy

Earth Day: See breathtaking photos Artemis II astronauts took of Earth

3 days ago

Severe Weather

Extreme rainfall in New Zealand causes devastating flooding

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

...

...

...