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Severe weather returns to central US this weekend with flood potential | Click to see the impacts. Chevron right
Torrential rain in Arthur's wake could lead to more flooding. Click for the forecast. Chevron right

O'Fallon, MO

68°F
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O'Fallon

Missouri

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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
Flood Watch

Today's Weather

Sat, Jun 20

Times of clouds and sun Hi: 84°

Tonight: Clouds breaking with a thunderstorm in spots late Lo: 69°

Current Weather

5:21 AM

68°F
RealFeel® 66°
Mostly cloudy More Details
Wind WNW 1 mph
Wind Gusts 2 mph
Air Quality Poor

Looking Ahead

Thunderstorms, some heavy, tomorrow morning through tomorrow evening

O'Fallon Weather Radar

O'Fallon Weather Radar
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Clouds
Temperature

Hourly Weather

6 AM 66°
rain drop 47%
7 AM 67°
rain drop 29%
8 AM 69°
rain drop 0%
9 AM 72°
rain drop 0%
10 AM 74°
rain drop 0%
11 AM 77°
rain drop 0%
12 PM 79°
rain drop 0%
1 PM 81°
rain drop 0%
2 PM 82°
rain drop 0%
3 PM 83°
rain drop 0%
4 PM 83°
rain drop 0%
5 PM 84°
rain drop 0%

10-Day Weather Forecast

Today

6/20

84° 69°

Times of clouds and sun

Night: A thunderstorm in spots late

1%

Sun

6/21

80° 63°

Cloudy, heavy t-storms; humid

Rain and a thunderstorm early

99%

Mon

6/22

77° 62°

Periods of sun with a shower

Cloudy

55%

Tue

6/23

79° 63°

Nice with clouds and sun

Partly cloudy

17%

Wed

6/24

83° 61°

A t-storm around in the p.m.

Partly cloudy

55%

Thu

6/25

80° 62°

An afternoon shower or two

Mainly clear

55%

Fri

6/26

81° 63°

Mostly sunny

A passing late-night shower

1%

Sat

6/27

78° 65°

Rain and a thunderstorm

Humid; a t-storm or two early

82%

Sun

6/28

80° 68°

Strong morning thunderstorms

Clear and humid

78%

Mon

6/29

85° 69°

Rain and a thunderstorm

A little evening rain; humid

76%

Sun & Moon

14 hrs 53 mins
Rise 5:38 AM
Set 8:31 PM
Waxing Crescent
Rise 11:54 AM
Set 12:37 AM

Air Quality

See More
Air Quality Poor

The air has reached a high level of pollution and is unhealthy for sensitive groups. Reduce time spent outside if you are feeling symptoms such as difficulty breathing or throat irritation.

Allergy Outlook

See All
Tree Pollen Low 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 Moderate 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:

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