Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
El Nino to play a major role this hurricane season. Here's how many storms AccuWeather experts are predicting. Chevron right

O'Fallon, MO

35°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Missouri

35°
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 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

Forensics

Advertising

Superior Accuracy™

Video

Winter Center
Today Hourly Daily Radar MinuteCast® Monthly Air Quality Health & Activities
Saturday, March 28

Current Weather

9:09 AM

35°F
Sunny
RealFeel® 46°
Chilly
RealFeel Guide
Chilly
40° to 52°
Jacket or sweater is recommended.
LEARN MORE
RealFeel Shade™ 37°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
RealFeel®
46°
RealFeel Shade™
37°
Max UV Index
3.2 (Moderate)
Wind
NNE 2 mph
Wind Gusts
5 mph
Humidity
59%
Indoor Humidity
32% (Dry)
Dew Point
22° F
Pressure
↔ 30.69 in
Cloud Cover
0%
Visibility
14 mi
Cloud Ceiling
33300 ft

Day

3/28
57°Hi
RealFeel® 57°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
RealFeel Shade™ 53°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
Plenty of sun

Max UV Index6.0 (High)

AccuLumen Brightness Index™9 (Very Bright)

WindSE 8 mph

Wind Gusts15 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover0%

Morning

Afternoon

Night

3/28
39°Lo
RealFeel® 34°
Cold
RealFeel Guide
Cold
25° to 39°
Coats and hats are appropriate, consider gloves and a scarf.
LEARN MORE
Breezy this evening; otherwise, partly cloudy

WindS 10 mph

Wind Gusts21 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover54%

Evening

Overnight

Sun & Moon

12 hrs 28 mins
Rise 6:54 AM
Set 7:22 PM
Waxing Gibbous
Rise 2:59 PM
Set 5:13 AM

Temperature History

3/28
High
Low
Forecast
57°
39°
Average
61°
38°
Last Year
81°
52°

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Weather Forecasts

Pacific storms to snap record heat wave in western U.S. next week

4 hours ago

Astronomy

Artemis II: What to know about this historic moon mission

19 hours ago

Severe Weather

Severe weather risk to accompany next warmup in Midwest

4 hours ago

Hurricane

Atlantic hurricane season forecast 2026: 11-16 named storms predicted

3 days ago

Astronomy

April's back-to-back astronomy events include 1st meteor shower in mon...

21 hours ago

 More Stories

Featured Stories

Economic Impact

Gas prices surge nearly $1 in a month as EV charging holds steady

20 hours ago

Recreation

DC cherry blossoms reach peak bloom early

1 day ago

Astronomy

April’s full Pink moon rises April 1: Here’s when to watch

19 hours ago

Sports

The hidden story behind the invention of basketball

20 hours ago

Astronomy

What’s behind the recent spike in meteor sightings across the US?

20 hours 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

...

...

...