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O'Fallon, MO

53°F
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O'Fallon

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O'Fallon, MO Weather
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May 5 - May 19

Tue 5/5

57° /48°
94%
Cooler with periods of rain and a thunderstorm

RealFeel®55°

RealFeel Shade™51°

Max UV Index2.0 (Low)

WindNNE 9 mph

Wed 5/6

63° /44°
55%
Cloudy with a brief shower

RealFeel®64°

RealFeel Shade™62°

Max UV Index3.0 (Moderate)

WindNNW 6 mph

Thu 5/7

66° /47°
15%
Sun and some clouds

RealFeel®73°

RealFeel Shade™63°

Max UV Index9.0 (Very High)

WindWSW 8 mph

Fri 5/8

73° /49°
84%
Some sun, then increasing clouds with a brief shower or two

RealFeel®75°

RealFeel Shade™70°

Max UV Index10.0 (Very High)

WindSW 10 mph

Sat 5/9

82° /57°
14%
Partly sunny and warmer

RealFeel®88°

RealFeel Shade™79°

Max UV Index10.0 (Very High)

WindSSW 6 mph

Sun 5/10

70° /46°
90%
Cloudy and not as warm with a couple of showers; breezy in the morning

RealFeel®68°

RealFeel Shade™66°

Max UV Index3.0 (Moderate)

WindNNW 12 mph

Mon 5/11

69° /47°
10%
Mostly sunny

RealFeel®72°

RealFeel Shade™66°

Max UV Index10.0 (Very High)

WindNNW 8 mph

Tue 5/12

70° /52°
10%
Partly sunny

RealFeel®75°

RealFeel Shade™67°

Max UV Index10.0 (Very High)

WindS 10 mph

Wed 5/13

76° /55°
63%
Cloudy with a couple of showers, mainly early in the day

RealFeel®78°

RealFeel Shade™74°

Max UV Index3.0 (Moderate)

WindWNW 7 mph

Thu 5/14

76° /58°
67%
Variable cloudiness with a couple of thunderstorms in the afternoon

RealFeel®80°

RealFeel Shade™75°

Max UV Index10.0 (Very High)

WindESE 7 mph

Fri 5/15

79° /59°
0%
Plenty of sunshine

RealFeel®83°

RealFeel Shade™78°

Max UV Index10.0 (Very High)

WindNW 10 mph

Sat 5/16

78° /57°
1%
Mostly sunny and less humid

RealFeel®85°

RealFeel Shade™76°

Max UV Index10.0 (Very High)

WindNW 5 mph

Sun 5/17

73° /57°
0%
Cloudy in the morning; sun and areas of high clouds in the afternoon

RealFeel®78°

RealFeel Shade™72°

Max UV Index5.0 (Moderate)

WindNNE 5 mph

Mon 5/18

75° /55°
55%
Intervals of clouds and sunshine with a shower in spots

RealFeel®76°

RealFeel Shade™72°

Max UV Index5.0 (Moderate)

WindSSW 6 mph

Tue 5/19

79° /58°
55%
Intervals of clouds and sunshine with a thundershower in spots

RealFeel®79°

RealFeel Shade™76°

Max UV Index2.0 (Low)

WindWNW 9 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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