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O'Fallon, MO

70°F
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O'Fallon

Missouri

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O'Fallon, MO Weather
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September 21 - October 5

Mon 9/21

73° /64°
14%
Cloudy

RealFeel®63°

Cloud Cover96%

WindNE 7 mph

Wind Gusts16 mph

Tue 9/22

69° /59°
13%
Cloudy and less humid

RealFeel®68°

RealFeel Shade™68°

Max UV Index1.0 (Low)

WindNNE 7 mph

Wed 9/23

72° /59°
1%
Pleasant with intervals of clouds and sunshine

RealFeel®74°

RealFeel Shade™69°

Max UV Index4.0 (Moderate)

WindNNE 7 mph

Thu 9/24

74° /60°
5%
Pleasant with intervals of clouds and sunshine

RealFeel®74°

RealFeel Shade™72°

Max UV Index3.0 (Moderate)

WindNNE 6 mph

Fri 9/25

74° /56°
21%
Pleasant with a sun-and-cloud mix

RealFeel®76°

RealFeel Shade™72°

Max UV Index3.0 (Moderate)

WindNE 6 mph

Sat 9/26

76° /60°
55%
Considerable cloudiness with a thunderstorm in spots in the afternoon

RealFeel®76°

RealFeel Shade™76°

Max UV Index1.0 (Low)

WindE 4 mph

Total Hours of Precipitation0.5

Total Hours of Rain0.5

Sun 9/27

80° /61°
55%
Times of clouds and sun with a shower in places

RealFeel®82°

RealFeel Shade™78°

Max UV Index3.0 (Moderate)

WindE 5 mph

Total Hours of Precipitation1

Total Hours of Rain1

Mon 9/28

79° /60°
0%
Mostly sunny

RealFeel®81°

RealFeel Shade™76°

Max UV Index5.0 (Moderate)

WindENE 5 mph

Tue 9/29

80° /58°
55%
A morning shower in spots; otherwise, partly sunny

RealFeel®82°

RealFeel Shade™78°

Max UV Index5.0 (Moderate)

WindESE 6 mph

Total Hours of Precipitation1

Total Hours of Rain1

Wed 9/30

79° /58°
1%
Mostly sunny

RealFeel®81°

RealFeel Shade™76°

Max UV Index5.0 (Moderate)

WindESE 6 mph

Thu 10/1

78° /59°
1%
Sunshine and a few clouds

RealFeel®82°

RealFeel Shade™76°

Max UV Index5.0 (Moderate)

WindENE 5 mph

Fri 10/2

77° /55°
75%
Rain

RealFeel®71°

RealFeel Shade™71°

Max UV Index1.0 (Low)

WindNE 10 mph

Total Hours of Precipitation4

Total Hours of Rain4

Sat 10/3

70° /61°
25%
Mostly cloudy

RealFeel®71°

RealFeel Shade™71°

Max UV Index2.0 (Low)

WindNW 2 mph

Sun 10/4

75° /60°
61%
Cloudy and humid with a couple of showers

RealFeel®75°

RealFeel Shade™75°

Max UV Index1.0 (Low)

WindSSE 8 mph

Total Hours of Precipitation3

Total Hours of Rain3

Mon 10/5

80° /61°
5%
Warm with plenty of sun

RealFeel®80°

RealFeel Shade™77°

Max UV Index4.0 (Moderate)

WindESE 8 mph

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World North America United States Missouri O'Fallon

Weather Near O'Fallon:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
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