O'Fallon, MO Weather Forecast

Tonight's Weather

Sat, Jun 13

Cloudy and humid; a couple of heavy late-night thunderstorms; storms can bring flooding downpours, hail, damaging wind gusts, and an isolated tornado Lo: 68°

Tomorrow: A thunderstorm in spots early in the morning; otherwise, breezy with clouds breaking for some sun, becoming less humid in the afternoon Hi: 77°

Current Weather

9:25 PM

74°F

RealFeel® 79°

Mostly clear More Details

Wind SE 1 mph

Wind Gusts 2 mph

Air Quality Fair

Looking Ahead

High risk of storms with destructive winds tonight; have a way to receive warnings

O'Fallon Weather Radar

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Clouds

Temperature

Hourly Weather

10-Day Weather Forecast

Tonight

6/13

68° Lo

Humid; heavy t-storms late

94%

Sun

6/14

77° 55°

A t-storm around in the a.m.

Night: Partly cloudy

55%

Mon

6/15

79° 58°

Partly sunny and pleasant

Partly cloudy

11%

Tue

6/16

77° 61°

More humid with a t-storm

Partly cloudy

55%

Wed

6/17

89° 70°

A severe p.m. t-storm; warmer

A couple of evening t-storms

55%

Thu

6/18

77° 58°

Overcast and not as warm

Some clouds; cooler

25%

Fri

6/19

81° 61°

Peeks of sunshine

Partly cloudy

10%

Sat

6/20

84° 68°

A couple of showers possible

Rain and a thunderstorm late

30%

Sun

6/21

79° 63°

Humid with periods of sun

Clearing and humid

25%

Mon

6/22

80° 62°

Mostly sunny

Partly cloudy

Sun & Moon

14 hrs 52 mins

Rise 5:37 AM

Set 8:29 PM

Waning Crescent

Rise 3:46 AM

Set 7:25 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.