O'Fallon, MO Weather Forecast

Today's Weather

Sun, May 31

Times of clouds and sun with a stray thunderstorm Hi: 82°

Tonight: Partly cloudy and humid; a late-night thunderstorm; slow-moving downpours can cause flash flooding; watch for and avoid high water Lo: 66°

Current Weather

6:16 AM

O'Fallon Weather Radar

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Clouds

Temperature

Hourly Weather

10-Day Weather Forecast

Today

5/31

82° 66°

A thunderstorm in spots

Night: Humid; a late-night t-storm

55%

Mon

6/1

81° 63°

Humid with a stray t-storm

Clear

55%

Tue

6/2

85° 54°

Mostly sunny and less humid

Mainly clear

Wed

6/3

82° 58°

Sunshine and a few clouds

Mainly clear

Thu

6/4

87° 65°

Partly sunny and very warm

Mainly clear

10%

Fri

6/5

84° 66°

An afternoon shower in spots

Some rain and a t-storm late

55%

Sat

6/6

82° 66°

Rain, a thunderstorm

Humid; a t-storm around late

78%

Sun

6/7

83° 68°

A couple of t-storms; humid

Humid with a thunderstorm

65%

Mon

6/8

81° 66°

A strong thunderstorm; humid

Humid; a strong t-storm early

55%

Tue

6/9

83° 63°

Humid; a quick morning shower

Clear to partly cloudy

59%

Sun & Moon

14 hrs 41 mins

Rise 5:40 AM

Set 8:21 PM

Full Moon

Rise 9:14 PM

Set 6:09 AM

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.