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O'Fallon, MO

54°F
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O'Fallon

Missouri

54°
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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 20 - June 3

Wed 5/20

67° /54°
55%
A passing shower this morning; otherwise, mostly cloudy and cooler

RealFeel®68°

RealFeel Shade™64°

Max UV Index4.0 (Moderate)

WindNNE 7 mph

Hours of Precipitation0.5

Hours of Rain0.5

Thu 5/21

71° /59°
10%
Times of clouds and sun

RealFeel®72°

RealFeel Shade™68°

Max UV Index5.0 (Moderate)

WindENE 8 mph

Fri 5/22

67° /58°
88%
Cloudy with a couple of showers and a thunderstorm

RealFeel®67°

RealFeel Shade™66°

Max UV Index2.0 (Low)

WindE 7 mph

Hours of Precipitation4

Hours of Rain4

Sat 5/23

76° /61°
55%
Cloudy, warmer and more humid with a thunderstorm

RealFeel®78°

RealFeel Shade™75°

Max UV Index3.0 (Moderate)

WindESE 7 mph

Hours of Precipitation2

Hours of Rain2

Sun 5/24

77° /60°
55%
Mostly cloudy and humid with a thunderstorm

RealFeel®80°

RealFeel Shade™76°

Max UV Index3.0 (Moderate)

WindESE 6 mph

Hours of Precipitation1

Hours of Rain1

Mon 5/25

76° /62°
25%
Cloudy and humid

RealFeel®80°

RealFeel Shade™76°

Max UV Index3.0 (Moderate)

WindE 6 mph

Tue 5/26

77° /63°
60%
Cloudy and humid with showers

RealFeel®80°

RealFeel Shade™76°

Max UV Index3.0 (Moderate)

WindSSE 10 mph

Hours of Precipitation2.5

Hours of Rain2.5

Wed 5/27

78° /64°
74%
Cloudy and humid; a couple of morning thunderstorms followed by rain and a thunderstorm in the afternoon

RealFeel®83°

RealFeel Shade™81°

Max UV Index3.0 (Moderate)

WindESE 6 mph

Hours of Precipitation5

Hours of Rain5

Thu 5/28

79° /63°
79%
A thick cloud cover and humid with thunderstorms, especially late in the day

RealFeel®88°

RealFeel Shade™85°

Max UV Index6.0 (High)

WindE 5 mph

Hours of Precipitation3

Hours of Rain3

Fri 5/29

80° /63°
64%
Continued cloudy and humid; a little rain in the morning followed by a shower in spots in the afternoon

RealFeel®86°

RealFeel Shade™82°

Max UV Index3.0 (Moderate)

WindNE 9 mph

Hours of Precipitation2

Hours of Rain2

Sat 5/30

81° /64°
56%
Mostly cloudy; a little morning rain followed by a passing shower in the afternoon

RealFeel®83°

RealFeel Shade™78°

Max UV Index10.0 (Very High)

WindENE 13 mph

Hours of Precipitation1.5

Hours of Rain1.5

Sun 5/31

80° /65°
49%
A shower in places in the morning; otherwise, times of clouds and sun

RealFeel®83°

RealFeel Shade™78°

Max UV Index4.0 (Moderate)

WindN 7 mph

Hours of Precipitation1

Hours of Rain1

Mon 6/1

81° /63°
1%
Times of clouds and sun

RealFeel®89°

RealFeel Shade™81°

Max UV Index5.0 (Moderate)

WindNNW 2 mph

Tue 6/2

80° /59°
20%
Mostly sunny

RealFeel®87°

RealFeel Shade™78°

Max UV Index11.0 (Extreme)

WindNW 7 mph

Wed 6/3

81° /64°
64%
Mostly cloudy and humid; a couple of afternoon showers and a thunderstorm

RealFeel®87°

RealFeel Shade™86°

Max UV Index4.0 (Moderate)

WindS 6 mph

Hours of Precipitation1

Hours of Rain1

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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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