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O'Fallon, MO

72°F
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O'Fallon

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O'Fallon, MO Weather
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May 4 - May 18

Mon 5/4

80° /55°
88%
Overcast with a couple of showers and a thunderstorm; thunderstorms can bring localized damaging wind gusts, hail and flooding downpours

RealFeel®56°

Cloud Cover96%

WindWSW 8 mph

Wind Gusts18 mph

Tue 5/5

59° /48°
94%
Cooler with periods of rain and a thunderstorm

RealFeel®55°

RealFeel Shade™54°

Max UV Index2.0 (Low)

WindNNE 9 mph

Wed 5/6

61° /42°
55%
Cloudy and cool; a brief afternoon shower

RealFeel®59°

RealFeel Shade™57°

Max UV Index2.0 (Low)

WindN 8 mph

Thu 5/7

66° /44°
18%
Partial sunshine

RealFeel®72°

RealFeel Shade™63°

Max UV Index10.0 (Very High)

WindW 7 mph

Fri 5/8

73° /49°
55%
Considerable cloudiness with a shower in spots

RealFeel®76°

RealFeel Shade™71°

Max UV Index3.0 (Moderate)

WindSW 7 mph

Sat 5/9

78° /57°
13%
Partly sunny and comfortable

RealFeel®84°

RealFeel Shade™75°

Max UV Index10.0 (Very High)

WindWSW 7 mph

Sun 5/10

70° /46°
59%
Occasional rain and a thunderstorm in the morning; otherwise, mostly cloudy and not as warm

RealFeel®72°

RealFeel Shade™69°

Max UV Index4.0 (Moderate)

WindNNE 8 mph

Mon 5/11

66° /44°
2%
Sunny to partly cloudy and less humid

RealFeel®67°

RealFeel Shade™62°

Max UV Index10.0 (Very High)

WindNNW 12 mph

Tue 5/12

74° /52°
3%
Sunny to partly cloudy and warmer

RealFeel®81°

RealFeel Shade™73°

Max UV Index10.0 (Very High)

WindNNE 2 mph

Wed 5/13

76° /55°
58%
Times of clouds and sun; a couple of morning showers followed by a thunderstorm in the afternoon

RealFeel®78°

RealFeel Shade™72°

Max UV Index10.0 (Very High)

WindS 12 mph

Thu 5/14

76° /50°
1%
Less humid with plenty of sunshine

RealFeel®79°

RealFeel Shade™74°

Max UV Index10.0 (Very High)

WindNNW 8 mph

Fri 5/15

73° /54°
0%
Humid with plenty of sunshine

RealFeel®86°

RealFeel Shade™77°

Max UV Index10.0 (Very High)

WindWNW 4 mph

Sat 5/16

76° /57°
55%
Partly sunny and humid; a thunderstorm in spots in the morning followed by a passing shower in the afternoon

RealFeel®79°

RealFeel Shade™74°

Max UV Index7.0 (High)

WindW 16 mph

Sun 5/17

77° /54°
73%
Cloudy with showers and thunderstorms

RealFeel®75°

RealFeel Shade™73°

Max UV Index2.0 (Low)

WindSSW 9 mph

Mon 5/18

75° /59°
55%
Intervals of clouds and sunshine with a shower in spots

RealFeel®76°

RealFeel Shade™74°

Max UV Index5.0 (Moderate)

WindSSW 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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