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O'Fallon, MO

72°F
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O'Fallon

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O'Fallon, MO Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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May 16 - May 30

Sat 5/16

79° /64°
98%
Mostly cloudy with a couple of showers and a heavy thunderstorm; thunderstorms could bring damaging winds, flash flooding and hail

RealFeel®81°

RealFeel Shade™78°

Max UV Index5.0 (Moderate)

WindSSW 9 mph

Hours of Precipitation4

Hours of Rain4

Sun 5/17

90° /71°
5%
Partly sunny and warmer

RealFeel®91°

RealFeel Shade™86°

Max UV Index10.0 (Very High)

WindS 13 mph

Mon 5/18

82° /71°
55%
Windy with intervals of clouds and sunshine; an afternoon thunderstorm

RealFeel®85°

RealFeel Shade™80°

Max UV Index5.0 (Moderate)

WindS 16 mph

Hours of Precipitation0.5

Hours of Rain0.5

Tue 5/19

79° /54°
88%
Breezy in the morning; considerable cloudiness and humid with a couple of showers and a thunderstorm; thunderstorms can bring localized damaging wind gusts

RealFeel®83°

RealFeel Shade™80°

Max UV Index3.0 (Moderate)

WindSSW 13 mph

Hours of Precipitation3

Hours of Rain3

Wed 5/20

70° /48°
20%
Partly sunny, pleasant and less humid

RealFeel®75°

RealFeel Shade™67°

Max UV Index7.0 (High)

WindN 9 mph

Thu 5/21

73° /49°
17%
Mostly sunny and pleasant

RealFeel®82°

RealFeel Shade™71°

Max UV Index10.0 (Very High)

WindESE 5 mph

Fri 5/22

80° /54°
1%
Mostly sunny

RealFeel®86°

RealFeel Shade™77°

Max UV Index11.0 (Extreme)

WindSSE 6 mph

Sat 5/23

83° /60°
30%
Cloudy with a couple of showers possible

RealFeel®83°

RealFeel Shade™82°

Max UV Index5.0 (Moderate)

WindSSW 7 mph

Sun 5/24

81° /60°
30%
Mostly cloudy and humid with a thunderstorm possible

RealFeel®84°

RealFeel Shade™80°

Max UV Index4.0 (Moderate)

WindNNW 5 mph

Mon 5/25

80° /59°
35%
Mostly cloudy and humid with a couple of showers and thunderstorms possible

RealFeel®85°

RealFeel Shade™83°

Max UV Index8.0 (Very High)

WindENE 9 mph

Tue 5/26

81° /60°
0%
Humid with sun and areas of high clouds

RealFeel®90°

RealFeel Shade™86°

Max UV Index6.0 (High)

WindE 9 mph

Wed 5/27

80° /63°
7%
Humid with intervals of clouds and sunshine

RealFeel®91°

RealFeel Shade™84°

Max UV Index10.0 (Very High)

WindESE 8 mph

Thu 5/28

81° /62°
60%
Humid with occasional rain

RealFeel®86°

RealFeel Shade™84°

Max UV Index3.0 (Moderate)

WindSE 7 mph

Hours of Precipitation4

Hours of Rain4

Fri 5/29

79° /58°
25%
Less humid with intervals of clouds and sunshine

RealFeel®86°

RealFeel Shade™77°

Max UV Index7.0 (High)

WindW 7 mph

Sat 5/30

78° /63°
20%
Mostly sunny and humid

RealFeel®89°

RealFeel Shade™81°

Max UV Index11.0 (Extreme)

WindWSW 6 mph

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World North America United States Missouri O'Fallon

Weather Near O'Fallon:

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