10-Day Weather Forecast for O'Fallon, Missouri 63366 - The Weather Channel | weather.com

Advertisement

Daily ForecastO'Fallon, Missouri 63366· as of 4:52 PM UTC

Advertisement

Trending Now

New March Heat Record: Where It Hit 110

0:26

Your Outlook For April-June: What's In Store For You

What To Look Out For With Your Dogs This Allergy Season

0:46

Historic Heat Wave: National Heat Record Broken, More Heat Ahead

Advertisement

Advertisement

Home & Garden

Don’t Make These Mistakes When Planting Your Spring Garden

0:35

When To Worry About Mold Growing In Your Home

0:38

Get Ahead For Spring With Essential Winter Garden Tips

0:30

Why Your Home's Air Might Be More Polluted Than Outdoors

1:04

On The Move

And The Best State For An Adventure Vacation Is ...

0:42

California Wildflower Superblooms Are Back In 2026

0:43

3 Big Changes Coming To National Parks In 2026

0:42

‘Rare And Remarkable’: Lake Superior Ice Caves Reopen

0:30

Advertisement

Spring Is Here

Leaves Increasing On Trees In The South, Pollen On The Rise

0:58

When Are The Average Last Freezes In The US?

0:50

Allergy Season Grows Longer – Especially In These Places

0:36

Record Warmth Is Almost Tripling Record Cold This Year

1:07

We Love Critters

Arena-Pethelpful

Big Bear Bald Eagle Protecting Their Eggs During Windstorm Is the Most Inspiring Hero

Arena-Pethelpful

Dog Gives Dad the Cold Shoulder After Making Him Wear a Rain Coat, and We’re Cracking Up

Arena-Pethelpful

Excited Porcupines Jump up and Down With Excitement Being Let Back Outside After Snowstorm

Arena-Pethelpful

Dad’s Running Commentary While Rescuing His Pup From 20 Inches of Snow Is Pure Comedy

Advertisement

Advertisement

Advertisement

Loading air quality data...

Advertisement

Editor's Pick

Meteorite Hunters Find Fragments Of Ohio Fireball

Meteorite hunters hopped on flights and drove hours across the country after seeing that stunning meteor streak across the sky over Ohio. They looked at radar locations to figure out where to start their hunt, and now they are showing off some of their finds. They’ll have to be confirmed by the American Meteor Society, but see why these hunters are so passionate about this pursuit.

0:26

Advertisement

Sun & Moon

Watch: Meteorite Hunters Find Fragments Of Ohio Fireball

0:26

Stay Safe

Dangerous Heat Threshold: Study Reveals 85-Degree Heat Index Triggers Sharp Rise In Workplace Injuries

Product Reviews & Deals

Portable Generator Guide: Essential Backup Power During Severe Weather

Advertisement

Advertisement