Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Newsletters
  • Advertising
  • Superior Accuracy™
Thunderstorms continue to threaten Plains, Southeast through midweek. Click for details Chevron right

O'Fallon, IL

57°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Illinois

57°
No results found.
Try searching for a city, zip code or point of interest.
settings
O'Fallon, IL 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

Newsletters

Advertising

Superior Accuracy™

Video

Winter Center
Today Hourly Daily Radar MinuteCast

Monthly

 Air Quality Health & Activities

June

January February March April May June July August September October November December

2025

2024 2025 2026

Daily
S
M
T
W
T
F
S
1
82°
60°
2
85°
58°
3
87°
66°
4
78°
67°
5
74°
63°
6
76°
63°
7
74°
62°
8
84°
65°
9
84°
62°
10
82°
57°
11
87°
64°
12
86°
66°
13
82°
69°
14
86°
67°
15
82°
69°
16
85°
69°
17
85°
68°
18
89°
71°
19
90°
69°
20
88°
70°
21
87°
67°
22
85°
68°
23
88°
66°
24
89°
70°
25
90°
70°
26
90°
69°
27
89°
70°
28
89°
70°
29
90°
71°
30
91°
71°
1
91°
70°
2
88°
71°
3
91°
69°
4
89°
70°
5
91°
70°

Temperature Graph

°F
100° 90° 80° 70° 60° Jun
Today 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

Further Ahead

July 2025

August 2025

September 2025

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Severe Weather

Severe thunderstorms to target Plains, Southeast through midweek

1 hour ago

Hurricane

A hurricane has never crossed the equator. Here's why.

15 hours ago

Weather Forecasts

Warm, drier stretch of weather coming to the Northeast

1 hour ago

Astronomy

Strawberry moon to delight stargazers ahead of summer solstice

23 hours ago

Hurricane

Barbara becomes first hurricane of 2025 season

1 hour ago

 More Stories

Featured Stories

Astronomy

SpaceX rocket debris litters Mexico beach, threatens environment

20 hours ago

Weather News

Maritime mystery solved after shipwreck discovered off UK coast

1 day ago

Health

Salmonella outbreak linked to eggs sickens people in 7 states

1 day ago

Astronomy

'Zero shadow day' makes photos look like AI

16 hours ago

Astronomy

Surprising study found hints of biological activity on distant planet

1 day 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 RealFeel® and RealFeel Shade™ 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 RealFeel® and RealFeel Shade™ 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
© 2025 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

...

...

...