Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Over 250 million face dangerous heat dome into 4th of July weekend. Click for details. Chevron right

O'Fallon, IL

78°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Illinois

78°
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, IL 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
Tuesday, July 14

Day

7/14
85°Hi
RealFeel® 92°
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
RealFeel Shade™ 83°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
Plenty of sunshine

Max UV Index11.0 (Extreme)

WindNE 5 mph

Wind Gusts12 mph

Probability of Precipitation20%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover1%

Morning

Afternoon

Night

7/14
64°Lo
RealFeel® 63°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Partly cloudy

WindNNE 7 mph

Wind Gusts13 mph

Probability of Precipitation25%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover56%

Evening

Overnight

Sun & Moon

14 hrs 37 mins
Rise 5:47 AM
Set 8:24 PM
New Moon
Rise 5:45 AM
Set 9:02 PM

Temperature History

7/14
High
Low
Forecast
85°
64°
Average
91°
68°
Last Year
86°
71°
Record
110°
1954
49°
1967

Further Ahead

Hourly

10-Day

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Fourth of July week furnace: Dangerous heat dome for 250 million

9 minutes ago

Astronomy

Strawberry moon: How to see the 1st full moon of summer

19 hours ago

Severe Weather

Heat dome to fuel 'ring of fire' severe thunderstorms

11 minutes ago
Live Blog

Live: World Cup 2026 weather updates

LATEST ENTRY

Heat wave to impact several key World Cup games

13 hours ago

Weather Forecasts

Fourth of July weather forecast: Heat, storms and smoke ahead

10 minutes ago

 More Stories

Featured Stories

Weather News

European heat wave death toll climbs, high temperatures continue

11 hours ago

Weather News

Venezuela death toll surges as crews search after earthquakes

1 day ago

Recreation

12-year-old injured by bison in Yellowstone National Park

15 hours ago

Weather News

At least 4 dead in Kentucky floods with more rainfall on the way

1 day ago

Recreation

Snake hunters compete for $25,000 wrangling pythons in Florida

4 days ago
World North America United States Illinois O'Fallon

Weather Near O'Fallon:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, 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

...

...

...