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O'Fallon, IL

31°F
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O'Fallon

Illinois

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O'Fallon, IL Weather
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Winter Center

Today

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

Today's Weather

Sun, Mar 1

Turning cloudy and cooler Hi: 47°

Tonight: Breezy with periods of rain mixing with snow and sleet with little or no accumulation; roads will be mainly wet Lo: 35°

Current Weather

9:51 AM

31°F
RealFeel® 31°
Partly sunny More Details
RealFeel Shade™ 26°
Wind NE 7 mph
Wind Gusts 13 mph
Air Quality Fair

Looking Ahead

Rounds of thunderstorms beginning toward midweek will bring an increased risk of flash flooding

WinterCast®

Late Sunday Night

Snow

Lasting 3 hours

Ice

Lasting 3 hours

O'Fallon Weather Radar

O'Fallon Weather Radar
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Clouds
Temperature

Hourly Weather

10 AM 36°
rain drop 0%
11 AM 41°
rain drop 0%
12 PM 43°
rain drop 0%
1 PM 45°
rain drop 0%
2 PM 46°
rain drop 0%
3 PM 47°
rain drop 0%
4 PM 46°
rain drop 1%
5 PM 45°
rain drop 1%
6 PM 43°
rain drop 4%
7 PM 44°
rain drop 49%
8 PM 41°
rain drop 75%
9 PM 41°
rain drop 75%

10-Day Weather Forecast

Today

3/1

47° 35°

Turning cloudy and cooler

Night: Rain mixing with snow, sleet
9%

Mon

3/2

47° 40°

Rain and drizzle in the a.m.

Cloudy, showers around late
60%

Tue

3/3

68° 54°

Some rain and a thunderstorm

Occasional rain and a t-storm
60%

Wed

3/4

65° 57°

A shower and t-storm; breezy

Late-night thunderstorms
88%

Thu

3/5

70° 59°

Cloudy, a shower and t-storm

Considerable cloudiness
88%

Fri

3/6

78° 57°

A shower and t-storm; warm

Some clouds with rain late
88%

Sat

3/7

66° 45°

Not as warm; morning rain

Clear to partly cloudy
75%

Sun

3/8

70° 55°

Mostly cloudy and warm

Partly cloudy
0%

Mon

3/9

75° 59°

Mostly cloudy, p.m. showers

Partly cloudy
75%

Tue

3/10

75° 55°

A couple of thunderstorms

Rain
64%

Sun & Moon

11 hrs 21 mins
Rise 6:32 AM
Set 5:53 PM
Waxing Gibbous
Rise 4:08 PM
Set 6:07 AM

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 Moderate 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 High Data is not supported in this location

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Weather Near O'Fallon:

  • O'Fallon, MO
  • St. Charles, MO
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