Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Springlike warmth in East to be erased by upcoming cold wave. Get the forecast. Chevron right

O'Fallon, MO

63°F
Location Chevron down
Location News Videos
Use Current Location
Recent

O'Fallon

Missouri

63°
No results found.
Try searching for a city, zip code or point of interest.
Create Account Unlock extended daily forecasts and additional saved locations — all with your free account.
Let's Go Chevron right
Have an account already? Login
settings
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

Unlock extended 90-day forecasts

Activate Your Premium+ Subscription

Chevron right

January 8 - February 6

Thu 1/8

65° /43°
100%
Warm with considerable cloudiness; brief showers this morning, then becoming windy with rain and a thunderstorm

RealFeel®59°

RealFeel Shade™58°

Max UV Index1.0 (Low)

WindS 14 mph

Fri 1/9

49° /37°
55%
A shower in the area early in the morning; low clouds and cooler

RealFeel®47°

RealFeel Shade™47°

Max UV Index1.0 (Low)

WindNNW 9 mph

Sat 1/10

44° /23°
60%
A couple of morning showers; otherwise, mostly cloudy and windy

RealFeel®33°

RealFeel Shade™33°

Max UV Index1.0 (Low)

WindWNW 16 mph

Sun 1/11

39° /25°
0%
Mostly sunny and windy

RealFeel®29°

RealFeel Shade™27°

Max UV Index2.0 (Low)

WindWNW 15 mph

Mon 1/12

54° /33°
3%
Abundant sunshine

RealFeel®52°

RealFeel Shade™49°

Max UV Index2.0 (Low)

WindSSW 10 mph

Tue 1/13

55° /35°
9%
Mostly cloudy and breezy

RealFeel®49°

RealFeel Shade™49°

Max UV Index1.0 (Low)

WindSW 14 mph

Wed 1/14

42° /22°
25%
Mostly cloudy and cooler

RealFeel®37°

RealFeel Shade™37°

Max UV Index1.0 (Low)

WindNNW 10 mph

Thu 1/15

36° /26°
1%
Mostly cloudy

RealFeel®41°

RealFeel Shade™38°

Max UV Index3.0 (Moderate)

WindSW 2 mph

Fri 1/16

41° /28°
13%
Cloudy

RealFeel®39°

RealFeel Shade™39°

Max UV Index1.0 (Low)

WindSSW 8 mph

Sat 1/17

40° /24°
70%
A mix of snow, ice and rain in the morning followed by a mix of snow, sleet and rain in the afternoon

RealFeel®35°

RealFeel Shade™35°

Max UV Index1.0 (Low)

WindNW 7 mph

Sun 1/18

35° /19°
3%
Sun followed by clouds

RealFeel®35°

RealFeel Shade™31°

Max UV Index3.0 (Moderate)

WindSSE 6 mph

Mon 1/19

34° /18°
25%
Low clouds, then perhaps some sun

RealFeel®28°

RealFeel Shade™28°

Max UV Index1.0 (Low)

WindWNW 10 mph

Tue 1/20

34° /19°
9%
Times of clouds and sun

RealFeel®34°

RealFeel Shade™31°

Max UV Index1.0 (Low)

WindSW 6 mph

Wed 1/21

39° /21°
25%
Mostly cloudy

RealFeel®36°

RealFeel Shade™36°

Max UV Index1.0 (Low)

WindW 7 mph

Thu 1/22

40° /27°
20%
Plenty of sunshine

RealFeel®35°

RealFeel Shade™32°

Max UV Index3.0 (Moderate)

WindSSW 9 mph

Fri 1/23

47° /15°
20%
Partly sunny

RealFeel®43°

RealFeel Shade™43°

Max UV Index2.0 (Low)

WindWSW 9 mph

Sat 1/24

41° /13°
10%
Mostly sunny

RealFeel®36°

RealFeel Shade™34°

Max UV Index3.0 (Moderate)

WindNW 12 mph

Sun 1/25

30° /18°
25%
Cloudy and colder

RealFeel®24°

RealFeel Shade™24°

Max UV Index1.0 (Low)

WindSE 6 mph

Mon 1/26

31° /15°
56%
Mostly cloudy with a little snow

RealFeel®31°

RealFeel Shade™31°

Max UV Index1.0 (Low)

WindNNW 5 mph

Tue 1/27

30° /13°
10%
Mostly sunny

RealFeel®32°

RealFeel Shade™26°

Max UV Index3.0 (Moderate)

WindSSE 5 mph

Wed 1/28

34° /29°
5%
Sunshine

RealFeel®29°

RealFeel Shade™28°

Max UV Index3.0 (Moderate)

WindS 9 mph

Thu 1/29

49° /30°
25%
Considerable cloudiness

RealFeel®41°

RealFeel Shade™41°

Max UV Index1.0 (Low)

WindSSW 13 mph

Fri 1/30

50° /15°
20%
After a cloudy start, sun returns

RealFeel®42°

RealFeel Shade™40°

Max UV Index3.0 (Moderate)

WindWNW 16 mph

Sat 1/31

31° /17°
5%
Colder with plenty of sunshine

RealFeel®34°

RealFeel Shade™32°

Max UV Index3.0 (Moderate)

WindNNE 6 mph

Sun 2/1

35° /29°
25%
After a cloudy start, sun returns

RealFeel®27°

RealFeel Shade™25°

Max UV Index2.0 (Low)

WindS 12 mph

Mon 2/2

48° /18°
20%
Mostly sunny and not as cold

RealFeel®42°

RealFeel Shade™39°

Max UV Index3.0 (Moderate)

WindNW 13 mph

Tue 2/3

34° /18°
20%
Abundant sunshine and colder

RealFeel®35°

RealFeel Shade™29°

Max UV Index3.0 (Moderate)

WindSE 6 mph

Wed 2/4

39° /20°
25%
Clouds and sun

RealFeel®31°

RealFeel Shade™31°

Max UV Index1.0 (Low)

WindWNW 12 mph

Thu 2/5

34° /17°
20%
Mostly sunny

RealFeel®41°

RealFeel Shade™38°

Max UV Index3.0 (Moderate)

WindNNE 4 mph

Fri 2/6

34° /24°
25%
Cloudy

RealFeel®29°

RealFeel Shade™29°

Max UV Index1.0 (Low)

WindE 8 mph

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Astronomy

NASA astronauts may come home early after medical issue on ISS

5 hours ago

Winter Weather

Juneau, Alaska, braces for more snow: 'There's nowhere to put it'

1 hour ago

Weather Forecasts

Springlike warmth in East to be replaced by cold air, snowstorm risk

33 minutes ago

Weather News

Families face complex challenges 1 year after Eaton, Palisades fires

1 day ago

Weather Forecasts

Pineapple Express to drench Washington, British Columbia and Alaska

1 hour ago

 More Stories

Featured Stories

Astronomy

Newly discovered asteroid spins at record-breaking speed

26 minutes ago

Weather News

Europe hit by winter storm; flights, trains disrupted

4 hours ago

Astronomy

Meteor showers 2026: The best nights to see shooting stars

1 hour ago

Climate

Climate risk reshaping homeownership decisions, study finds

1 day ago

Astronomy

Hubble telescope spots ‘failed’ starless galaxy known as Cloud 9

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 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
© 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

...

...

...