O'Fallon, IL Weather Forecast

Today's Weather

Wed, Sep 9

Mostly sunny and very hot with the temperature tying the record high from 1955; a thunderstorm in the afternoon; gusty winds can accompany any downpour Hi: 98°

Tonight: Increasing clouds with a couple of showers and a thunderstorm; warm and humid; thunderstorms can bring gusty winds and ponding on roadways Lo: 73°

Current Weather

1:32 AM

77°F

RealFeel® 79°

Partly cloudy More Details

Wind SSE 3 mph

Wind Gusts 7 mph

Air Quality Fair

O'Fallon Weather Radar

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Clouds

Temperature

Hourly Weather

10-Day Weather Forecast

Today

9/9

98° 73°

An afternoon thunderstorm

Night: A shower and thunderstorm

70%

Thu

9/10

78° 62°

A shower and t-storm; humid

Partly cloudy

88%

Fri

9/11

84° 66°

Humid with clouds and sun

Clear and humid

Sat

9/12

90° 67°

A thunderstorm in spots

Humid with a t-storm in spots

55%

Sun

9/13

91° 70°

Partly sunny, warm and humid

Mainly clear, warm and humid

21%

Mon

9/14

97° 68°

Very hot with clouds and sun

Mainly clear, warm and humid

24%

Tue

9/15

84° 58°

Humid; a p.m. t-storm or two

Partly cloudy and humid

61%

Wed

9/16

82° 57°

Humid; a p.m. t-storm or two

Mainly clear and humid

64%

Thu

9/17

82° 60°

Humid with rain and a t-storm

Partly cloudy

69%

Fri

9/18

79° 55°

Times of clouds and sun

Some clouds

Sun & Moon

12 hrs 42 mins

Rise 6:36 AM

Set 7:18 PM

Waning Crescent

Rise 4:48 AM

Set 6:33 PM

Air Quality

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.