Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Significant, life-threatening flash flooding ongoing in southeast Missouri. Get the latest. Chevron right

O'Fallon, MO

71°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Missouri

71°
No results found.
Try searching for a city, zip code or point of interest.
Get Premium+
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
Saturday, July 25

Day

7/25
91°Hi
RealFeel® 103°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
RealFeel Shade™ 94°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
Sunny and toasty conditions

Max UV Index10.0 (Very High)

WindWSW 4 mph

Wind Gusts7 mph

Probability of Precipitation5%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover5%

Morning

Afternoon

Night

7/25
73°Lo
RealFeel® 75°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Mainly clear

WindENE 4 mph

Wind Gusts5 mph

Probability of Precipitation20%

Probability of Thunderstorms1%

Precipitation0.00 in

Cloud Cover26%

Evening

Overnight

Sun & Moon

14 hrs 22 mins
Rise 5:58 AM
Set 8:20 PM
Waxing Gibbous
Rise 5:57 PM
Set 2:51 AM

Temperature History

7/25
High
Low
Forecast
91°
73°
Average
89°
68°
Last Year
95°
73°

Further Ahead

Hourly

10-Day

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Flash flood risk reaches extreme levels from Missouri to Tennessee

15 minutes ago

Weather News

Dangerous heat to reach from Salt Lake City to Minneapolis, Philly

17 minutes ago

Severe Weather

Tireless severe storms to repeat from Plains to mid-Atlantic

17 minutes ago

Weather Forecasts

First storms of summer to arrive in southwest U.S. as monsoon begins

17 minutes ago
Live Blog

Live: World Cup 2026 weather updates

LATEST ENTRY

Ideal weather expected for today's Los Angeles match

13 hours ago

 More Stories

Featured Stories

Super Typhoon Bavi leaves trail of destruction

2 days ago 0:36

Weather News

Victims of Spanish wildfires were killed while trying to escape along ...

16 hours ago

Recreation

30 beluga whales to be rescued from shuttered Marineland in Canada

14 hours ago

Astronomy

A viral sunset and dueling meteor showers are coming in July

10 hours ago

Weather News

At least 750 structures destroyed by Colorado wildfire, images show

1 day 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

...

...

...