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Severe storms with damaging winds to focus on central, eastern US. Click for the forecast. Chevron right

O'Fallon, MO

62°F
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O'Fallon

Missouri

62°
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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 19 - June 2

Tue 5/19

76° /55°
60%
Overcast with a shower

RealFeel®53°

Cloud Cover98%

WindN 7 mph

Wind Gusts15 mph

Hours of Precipitation2

Hours of Rain2

Wed 5/20

65° /53°
25%
Cooler and less humid with sun and areas of high clouds

RealFeel®66°

RealFeel Shade™64°

Max UV Index4.0 (Moderate)

WindNE 7 mph

Thu 5/21

69° /59°
25%
Times of clouds and sun

RealFeel®71°

RealFeel Shade™67°

Max UV Index5.0 (Moderate)

WindENE 7 mph

Fri 5/22

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

RealFeel®67°

RealFeel Shade™65°

Max UV Index3.0 (Moderate)

WindE 7 mph

Hours of Precipitation3.5

Hours of Rain3.5

Sat 5/23

76° /61°
56%
Cloudy and warmer with a thunderstorm in the area, mainly later

RealFeel®78°

RealFeel Shade™74°

Max UV Index3.0 (Moderate)

WindW 6 mph

Hours of Precipitation1

Hours of Rain1

Sun 5/24

77° /60°
30%
Mostly cloudy and humid with a thunderstorm possible

RealFeel®83°

RealFeel Shade™77°

Max UV Index4.0 (Moderate)

WindSW 5 mph

Mon 5/25

76° /62°
25%
Cloudy and humid

RealFeel®84°

RealFeel Shade™80°

Max UV Index3.0 (Moderate)

WindENE 4 mph

Tue 5/26

80° /65°
60%
Cloudy and humid with showers

RealFeel®82°

RealFeel Shade™80°

Max UV Index2.0 (Low)

WindENE 8 mph

Hours of Precipitation2

Hours of Rain2

Wed 5/27

82° /64°
60%
Humid with rain at times

RealFeel®84°

RealFeel Shade™84°

Max UV Index2.0 (Low)

WindENE 9 mph

Hours of Precipitation3.5

Hours of Rain3.5

Thu 5/28

80° /65°
62%
Humid with considerable cloudiness; occasional rain and a thunderstorm in the morning followed by a couple of thunderstorms in the afternoon

RealFeel®88°

RealFeel Shade™86°

Max UV Index3.0 (Moderate)

WindSE 4 mph

Hours of Precipitation3

Hours of Rain3

Fri 5/29

80° /63°
60%
Humid with occasional rain

RealFeel®85°

RealFeel Shade™85°

Max UV Index3.0 (Moderate)

WindESE 7 mph

Hours of Precipitation3.5

Hours of Rain3.5

Sat 5/30

81° /61°
75%
Humid with rain

RealFeel®86°

RealFeel Shade™84°

Max UV Index2.0 (Low)

WindESE 9 mph

Hours of Precipitation8.5

Hours of Rain8.5

Sun 5/31

82° /63°
74%
Remaining cloudy and humid; a shower in spots in the morning followed by periods of rain in the afternoon

RealFeel®90°

RealFeel Shade™87°

Max UV Index4.0 (Moderate)

WindSE 9 mph

Hours of Precipitation2

Hours of Rain2

Mon 6/1

80° /59°
25%
Times of clouds and sun

RealFeel®86°

RealFeel Shade™77°

Max UV Index11.0 (Extreme)

WindWNW 8 mph

Tue 6/2

83° /63°
20%
Mostly sunny and less humid

RealFeel®88°

RealFeel Shade™80°

Max UV Index11.0 (Extreme)

WindNW 7 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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