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150 million in South, East face major snow and ice storm. Get the forecast. Chevron right

O'Fallon, MO

37°F
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O'Fallon

Missouri

37°
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O'Fallon, MO Weather
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Winter Center

Today

 WinterCast Hourly Daily Radar MinuteCast® Monthly Air Quality Health & Activities

Today's Weather

Wed, Jan 21

Breezy with clouds giving way to sun Hi: 45°

Tonight: Partly cloudy Lo: 20°

Current Weather

8:46 AM

37°F
RealFeel® 41°
Sunny More Details
RealFeel Shade™ 39°
Wind SW 2 mph
Wind Gusts 7 mph
Air Quality Fair

Looking Ahead

Snowfall from late Friday night into Sunday morning will total 1-3 inches

WinterCast®

Late Fri Night - Sun Afternoon

Snow

Lasting 1 day

O'Fallon Weather Radar

O'Fallon Weather Radar
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Clouds
Temperature

Hourly Weather

9 AM 37°
rain drop 0%
10 AM 39°
rain drop 0%
11 AM 41°
rain drop 0%
12 PM 43°
rain drop 0%
1 PM 44°
rain drop 0%
2 PM 45°
rain drop 0%
3 PM 44°
rain drop 0%
4 PM 43°
rain drop 0%
5 PM 40°
rain drop 0%
6 PM 38°
rain drop 0%
7 PM 36°
rain drop 0%
8 PM 36°
rain drop 0%

10-Day Weather Forecast

Today

1/21

45° 20°

Clearing and breezy

Night: Partly cloudy
0%

Thu

1/22

39° 7°

Sun and areas of high clouds

Colder; breezy late
0%

Fri

1/23

13° 0°

Breezy and much colder

Frigid; a bit of snow late
4%

Sat

1/24

9° 6°

Snow and flurries at times

Frigid with snow, 1-2"
60%

Sun

1/25

19° 0°

Frigid; a.m. snow, up to 1"

Frigid; breezy in the evening
61%

Mon

1/26

18° 10°

Frigid; breezy in the morning

Clear and cold
9%

Tue

1/27

35° 18°

Mostly cloudy and not as cold

Partly cloudy
1%

Wed

1/28

34° 11°

Clouds breaking for some sun

Clear and cold
2%

Thu

1/29

30° 16°

Plenty of sun, but cold

Clear and cold
1%

Fri

1/30

36° 17°

Mostly cloudy

Partly cloudy
3%

Sun & Moon

9 hrs 55 mins
Rise 7:17 AM
Set 5:12 PM
Waxing Crescent
Rise 8:59 AM
Set 8:20 PM

Air Quality

See More
Air Quality Fair

The air quality is generally acceptable for most individuals. However, sensitive groups may experience minor to moderate symptoms from long-term exposure.

Allergy Outlook

See All
Tree Pollen Low Data is not supported in this location Ragweed Pollen Low Data is not supported in this location Mold Low Data is not supported in this location Grass Pollen Low Data is not supported in this location Dust & Dander Very High Data is not supported in this location

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World North America United States Missouri O'Fallon

Weather Near O'Fallon:

  • St. Charles, MO
  • St. Louis, MO
  • St. Peters, MO
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