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Tropical Storm Erick to rapidly strengthen, may become major hurricane Chevron right
Heat wave to push temps near 100 F across central, eastern US Chevron right

O'Fallon, IL

89°F
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O'Fallon

Illinois

89°
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O'Fallon, IL Weather
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Today

 Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities
Air Quality Alert

Today's Weather

Tue, Jun 17

Humid this morning with clouds and fog; clouds giving way to some sun this afternoon Hi: 89°

Tonight: Warm and humid with a thunderstorm in parts of the area; clear to partly cloudy this evening, then mostly cloudy late Lo: 72°

Current Weather

4:34 PM

89°F
RealFeel® 98°
Mostly sunny More Details
RealFeel Shade™ 94°
Wind SSW 3 mph
Wind Gusts 5 mph
Air Quality Poor

O'Fallon Weather Radar

O'Fallon Weather Radar
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Clouds
Temperature

Hourly Weather

5 PM 87°
rain drop 0%
6 PM 86°
rain drop 0%
7 PM 84°
rain drop 2%
8 PM 82°
rain drop 8%
9 PM 80°
rain drop 8%
10 PM 78°
rain drop 12%
11 PM 76°
rain drop 51%
12 AM 75°
rain drop 47%
1 AM 74°
rain drop 39%
2 AM 73°
rain drop 32%
3 AM 73°
rain drop 32%
4 AM 72°
rain drop 36%

10-Day Weather Forecast

Today

6/17

89° 72°

Humid in the a.m.; clearing

Night: A thunderstorm in spots
25%

Wed

6/18

82° 68°

Showers and a heavier t-storm

Showers and a heavier t-storm
96%

Thu

6/19

86° 66°

Partly sunny and pleasant

Partly cloudy
1%

Fri

6/20

92° 73°

Humid with plenty of sunshine

Clear, warm and humid
1%

Sat

6/21

97° 72°

Sunny and very hot

Clear, warm and very humid
1%

Sun

6/22

94° 74°

Mostly sunny, hot and humid

Clear, warm and very humid
1%

Mon

6/23

93° 73°

Mostly sunny, hot and humid

Clear, warm and very humid
1%

Tue

6/24

93° 72°

Mostly sunny, hot and humid

Clear, warm and humid
4%

Wed

6/25

92° 71°

Humid with a t-storm in spots

Clear, warm and very humid
39%

Thu

6/26

93° 71°

A stray t-storm; hot, humid

Partly cloudy and humid
39%

Sun & Moon

14 hrs 51 mins
Rise 5:35 AM
Set 8:26 PM
Waning Gibbous
Rise 12:25 AM
Set 11:47 AM

Air Quality

See More
Air Quality Poor

The air has reached a high level of pollution and is unhealthy for sensitive groups. Reduce time spent outside if you are feeling symptoms such as difficulty breathing or throat irritation.

Allergy Outlook

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

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World North America United States Illinois O'Fallon

Weather Near O'Fallon:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
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