Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Meteorological spring to start with snow in parts of the U.S. See the forecast. Chevron right
Severe weather risk to increase as weather pattern shifts in March. Get the forecast details. Chevron right

O'Fallon, MO

75°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Missouri

75°
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 WinterCast Hourly Daily Radar MinuteCast® Monthly Air Quality Health & Activities
Saturday, February 28

Day

2/28
64°Hi
RealFeel® 64°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
RealFeel Shade™ 62°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
Sunny to partly cloudy with a shower in spots late in the afternoon

Max UV Index4.0 (Moderate)

AccuLumen Brightness Index™9 (Very Bright)

WindESE 8 mph

Wind Gusts10 mph

Probability of Precipitation49%

Probability of Thunderstorms10%

Precipitation0.01 in

Rain0.01 in

Hours of Precipitation0.5

Hours of Rain0.5

Cloud Cover25%

Morning

Afternoon

Night

2/28
27°Lo
RealFeel® 18°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
Mostly cloudy and colder

WindNNE 9 mph

Wind Gusts17 mph

Probability of Precipitation12%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover81%

Evening

Overnight

Sun & Moon

11 hrs 18 mins
Rise 6:35 AM
Set 5:53 PM
Waxing Gibbous
Rise 2:57 PM
Set 5:40 AM

Temperature History

2/28
High
Low
Forecast
64°
27°
Average
50°
31°
Last Year
75°
31°

Further Ahead

Hourly

Daily

Monthly

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Severe Weather

March springlike surge to foster severe storms from Texas to Michigan

1 hour ago

Recreation

Battleship evacuated after walkway collapses in high winds

7 hours ago

Winter Weather

Meteorological spring to meet with wintry storms in Midwest, Northeast

1 hour ago

Severe Weather

Tornado season: What forecasters expect for severe weather in 2026

23 hours ago

Weather News

106 degrees in Texas may be new record for U.S. winter

3 hours ago

 More Stories

Featured Stories

Winter Weather

Rhode Island student dies while charging phone in car during blizzard

6 hours ago

Weather News

After heartbreaking loss, famous eagle Jackie lays new egg

1 day ago

Astronomy

March adds daylight fast, a change bigger than most people realize

2 days ago

Weather News

A 4-month-old bird flew over 8,000 miles nonstop across the Pacific

2 days ago

Astronomy

Webb reveals Uranus’s upper atmosphere in unprecedented detail

2 days ago
World North America United States Missouri 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

...

...

...