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O'Fallon, MO

69°F
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O'Fallon

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O'Fallon, MO Weather
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Winter Center

Today

 Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Today's Weather

Sun, May 17

Partly sunny and very warm; possible danger of dehydration and heatstroke while doing strenuous activities Hi: 88°

Tonight: Partly cloudy; breezy, very warm and more humid Lo: 73°

Current Weather

7:30 AM

69°F
RealFeel® 72°
Mostly cloudy More Details
RealFeel Shade™ 69°
Wind SSE 3 mph
Wind Gusts 7 mph
Air Quality Fair

Looking Ahead

Thunderstorms, some strong, tomorrow afternoon through Tuesday evening; storms can bring hail and damaging winds

O'Fallon Weather Radar

O'Fallon Weather Radar
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Clouds
Temperature

Hourly Weather

8 AM 70°
rain drop 0%
9 AM 74°
rain drop 0%
10 AM 77°
rain drop 0%
11 AM 80°
rain drop 0%
12 PM 82°
rain drop 0%
1 PM 84°
rain drop 0%
2 PM 85°
rain drop 0%
3 PM 87°
rain drop 0%
4 PM 88°
rain drop 0%
5 PM 86°
rain drop 0%
6 PM 85°
rain drop 0%
7 PM 83°
rain drop 0%

10-Day Weather Forecast

Today

5/17

88° 73°

Partly sunny and very warm

Night: Breezy, warm and more humid
2%

Mon

5/18

81° 71°

An afternoon t-storm or two

A strong t-storm; very warm
90%

Tue

5/19

79° 54°

A shower and thunderstorm

Cooler; a heavy t-storm early
88%

Wed

5/20

67° 50°

Partly sunny and cooler

Mainly clear
12%

Thu

5/21

69° 56°

Pleasant with clouds and sun

Mostly cloudy
25%

Fri

5/22

74° 56°

Partly sunny and pleasant

A shower early; mostly cloudy
25%

Sat

5/23

78° 60°

A couple of showers possible

Partly cloudy
30%

Sun

5/24

79° 62°

Humid with a t-storm possible

Partly cloudy and humid
30%

Mon

5/25

80° 62°

Humid with t-storms possible

Humid; a t-storm around late
35%

Tue

5/26

81° 63°

A little afternoon rain

Humid; a bit of evening rain
57%

Sun & Moon

14 hrs 21 mins
Rise 5:49 AM
Set 8:10 PM
Waxing Crescent
Rise 6:00 AM
Set 9:53 PM

Air Quality

See More
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.

Allergy Outlook

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

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Weather Near O'Fallon:

  • St. Charles, MO
  • St. Louis, MO
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