Hourly Weather Forecast for O'Fallon, St. Louis, Missouri - The Weather Channel | weather.com

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Hourly WeatherO'Fallon, St. Louis, Missouri · as of 11:27 PM UTC

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On The Move

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

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California Wildflower Superblooms Are Back In 2026

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3 Big Changes Coming To National Parks In 2026

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‘Rare And Remarkable’: Lake Superior Ice Caves Reopen

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The Worst Flooding Oahu Has Seen In Over Two Decades; Thousands Told To Flee

Record High Temperatures Spread From Coast To Coast

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Wind, Large Hail Threat For Ohio Valley, Snow In New England

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We Love Our Critters

What To Look Out For With Your Dogs This Allergy Season

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Stick Is Life! Watch This Dog Plow Through 20 Inches Of Snow

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Snow Vs. Short Legs: Watch This Corgi’s Blizzard Battle

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Newly Identified Tick-Borne Bacterium In US Dogs

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Spring Is Here

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

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When Are The Average Last Freezes In The US?

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Allergy Season Grows Longer – Especially In These Places

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Record Warmth Is Almost Tripling Record Cold This Year

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Home & Garden

Don’t Make These Mistakes When Planting Your Spring Garden

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When To Worry About Mold Growing In Your Home

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Get Ahead For Spring With Essential Winter Garden Tips

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

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Sun & Moon

Chickpeas Can Be Grown In Space, Researchers Say

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Stay Safe

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

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