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O'Fallon, MO

62°F
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O'Fallon

Missouri

62°
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O'Fallon, MO Weather
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May 1 - May 15

Fri 5/1

62° /42°
2%
Cool with sunshine mixing with some clouds

RealFeel®76°

RealFeel Shade™62°

Max UV Index9.0 (Very High)

WindNNW 7 mph

Sat 5/2

59° /40°
55%
Partly sunny and cool with a shower in spots

RealFeel®59°

RealFeel Shade™56°

Max UV Index6.0 (High)

WindNNW 9 mph

Sun 5/3

76° /53°
25%
Mostly sunny, breezy and warmer; a nice end to the weekend

RealFeel®76°

RealFeel Shade™72°

Max UV Index9.0 (Very High)

WindSW 14 mph

Mon 5/4

76° /56°
55%
Breezy in the morning; otherwise, times of sun and clouds with a thunderstorm in the area in the afternoon

RealFeel®78°

RealFeel Shade™73°

Max UV Index5.0 (Moderate)

WindSSW 12 mph

Tue 5/5

63° /47°
85%
Cloudy and cooler with a couple of showers

RealFeel®63°

RealFeel Shade™60°

Max UV Index2.0 (Low)

WindNW 9 mph

Wed 5/6

56° /42°
61%
Cloudy and cool; a shower in the afternoon

RealFeel®62°

RealFeel Shade™56°

Max UV Index2.0 (Low)

WindNNW 4 mph

Thu 5/7

63° /43°
55%
Intervals of clouds and sunshine with a shower in spots; cool

RealFeel®64°

RealFeel Shade™58°

Max UV Index10.0 (Very High)

WindW 10 mph

Fri 5/8

69° /51°
6%
After a cloudy start, sunshine returns

RealFeel®75°

RealFeel Shade™66°

Max UV Index10.0 (Very High)

WindNW 6 mph

Sat 5/9

72° /52°
0%
Sunshine

RealFeel®80°

RealFeel Shade™70°

Max UV Index10.0 (Very High)

WindW 4 mph

Sun 5/10

73° /52°
0%
Sun through high clouds

RealFeel®75°

RealFeel Shade™72°

Max UV Index5.0 (Moderate)

WindSSE 4 mph

Mon 5/11

73° /52°
1%
Mostly sunny

RealFeel®77°

RealFeel Shade™73°

Max UV Index10.0 (Very High)

WindNW 13 mph

Tue 5/12

71° /54°
60%
Mostly cloudy with a little rain in the afternoon

RealFeel®78°

RealFeel Shade™69°

Max UV Index10.0 (Very High)

WindSW 8 mph

Wed 5/13

72° /51°
1%
Partly sunny

RealFeel®81°

RealFeel Shade™70°

Max UV Index10.0 (Very High)

WindN 5 mph

Thu 5/14

75° /53°
81%
Cloudy with rain ending, then a leftover shower

RealFeel®75°

RealFeel Shade™75°

Max UV Index2.0 (Low)

WindSE 5 mph

Fri 5/15

72° /58°
63%
Cloudy; a couple of showers and a thunderstorm in the morning followed by a little rain in the afternoon

RealFeel®74°

RealFeel Shade™72°

Max UV Index2.0 (Low)

WindNNW 5 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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