Monthly Weather Forecast for O'Fallon, Missouri 63368 - weather.com

Advertisement

Advertisement

Monthly Weather-

As of 1:03 am CST

Sun
mon
tue
wed
thu
fri
sat

Day

66°

5%

SW 11 mph

Mainly sunny. High 66F. Winds SW at 10 to 15 mph.

Record High85°
Average High52°
Sunrise7:24 am
Sunset7:02 pm

Night

46°

1%

SSW 8 mph

A mostly clear sky. Low 46F. Winds SSW at 5 to 10 mph.

Record Low-4°
Average Low31°
Moonrise--
Moonset9:36 am
Waning Gibbous

Advertisement

We Love Our Critters

When The Sun Is Giving You Life – Like This Sunbathing Lemur

Watch: Golden Retriever Goes Kitesurfing In Brazil

Ewe Won’t Stop Laughing At Sheep Sliding Down Icy Hill

Punch The Monkey Learns How To Shelter From The Rain

Travel

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

California Wildflower Superblooms Are Back In 2026

3 Big Changes Coming To National Parks In 2026

‘Rare And Remarkable’: Lake Superior Ice Caves Reopen

Advertisement

Home, Garage & Garden

Don’t Make These Mistakes When Planting Your Spring Garden

When To Worry About Mold Growing In Your Home

Get Ahead For Spring With Essential Winter Garden Tips

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

Mar 8	High	Low	Precip
Averages	52°F	31°	--
Records	85°(1974)	-4°(1989)	--

Reported Conditions
Yesterday	80°	57°	0.88 in
Last 7 Days	80°	25°	2.89
Month to Date	80°	32°	2.87

Historical Monthly Avg
March	55°	33°	3.74
April	67°	44°	4.70
May	76°	54°	5.09

Sun & Moon

March Could Produce The Best Northern Lights In A Decade

Looking Up? Light Pollution Can Ruin Your Viewing Night

Why A 'Slushy' Moon Might Be The Best Place To Find Aliens

Watch: Brilliant Aurora Dances Under The Moon

Travel Far, Travel Often

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

California Wildflower Superblooms Are Back In 2026

3 Big Changes Coming To National Parks In 2026

‘Rare And Remarkable’: Lake Superior Ice Caves Reopen