O'Fallon, MO Weather Forecast

Extreme Heat Watch

Today's Weather

Sat, Aug 8

Partly to mostly sunny and humid Hi: 91°

Tonight: Clear to partly cloudy and humid Lo: 70°

Current Weather

6:15 AM

Looking Ahead

Thunderstorms in the area late Monday night through Wednesday afternoon. Thunderstorms from late Wednesday night to Thursday morning; storms can be strong late Wednesday night.

O'Fallon Weather Radar

Static Radar Temporarily Unavailable

Thank you for your patience as we work to get everything up and running again.

Refresh Page

Clouds

Temperature

Hourly Weather

10-Day Weather Forecast

Today

8/8

91° 70°

Mostly sunny and humid

Night: Mainly clear and humid

Sun

8/9

92° 73°

Mostly sunny and humid

Mainly clear and humid

25%

Mon

8/10

93° 73°

Partly sunny; hot and humid

Humid; a thunderstorm late

Tue

8/11

95° 74°

Humid with a t-storm in spots

Humid with a thunderstorm

55%

Wed

8/12

92° 72°

Humid with a thunderstorm

Strong t-storms late; humid

58%

Thu

8/13

87° 72°

A couple of t-storms; humid

Partly cloudy

89%

Fri

8/14

88° 70°

Rain and a thunderstorm

A late-night t-storm or two

80%

Sat

8/15

83° 67°

A couple of t-storms; humid

An evening shower; humid

74%

Sun

8/16

84° 64°

Cloudy and humid

Partly to mostly cloudy

19%

Mon

8/17

81° 64°

Intervals of bright sunshine

Occasional rain

20%

Sun & Moon

13 hrs 56 mins

Rise 6:10 AM

Set 8:06 PM

Waning Crescent

Rise 1:07 AM

Set 5:07 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.