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Big heat is coming to the Northeast, so are more downpours Chevron right
North Central states face daily bouts of severe weather. Click here for more details Chevron right

O'Fallon, MO

82°F
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O'Fallon

Missouri

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O'Fallon, MO Weather
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 Daily Radar MinuteCast Monthly Air Quality Health & Activities

2 PM

80°
RealFeel® 90°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™81°

WindNE 7 mph

Air QualityFair

Max UV Index10 (Very High)

Wind Gusts9 mph

Humidity63%

Indoor Humidity63% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

3 PM

81°
RealFeel® 90°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™82°

WindNNE 7 mph

Air QualityFair

Max UV Index8 (Very High)

Wind Gusts10 mph

Humidity61%

Indoor Humidity61% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

4 PM

82°
RealFeel® 89°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™82°

WindNNE 7 mph

Air QualityFair

Max UV Index5 (Moderate)

Wind Gusts12 mph

Humidity60%

Indoor Humidity60% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

83°
RealFeel® 88°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™83°

WindNNE 7 mph

Air QualityFair

Max UV Index3 (Moderate)

Wind Gusts10 mph

Humidity58%

Indoor Humidity58% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

82°
RealFeel® 85°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™82°

WindNE 8 mph

Air QualityFair

Max UV Index2 (Low)

Wind Gusts10 mph

Humidity61%

Indoor Humidity61% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

79°
RealFeel® 81°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™79°

WindNE 8 mph

Air QualityFair

Max UV Index1 (Low)

Wind Gusts9 mph

Humidity67%

Indoor Humidity67% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™7 (Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

76°
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 1%
Chevron down
Mostly sunny

RealFeel Shade™77°

WindNE 6 mph

Air QualityFair

Max UV Index0 (Low)

Wind Gusts13 mph

Humidity74%

Indoor Humidity74% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

75°
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 1%
Chevron down
Mostly clear

WindENE 6 mph

Air QualityFair

Wind Gusts12 mph

Humidity78%

Indoor Humidity78% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

73°
RealFeel® 74°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 1%
Chevron down
Mostly clear

WindENE 6 mph

Air QualityFair

Wind Gusts10 mph

Humidity84%

Indoor Humidity84% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

71°
RealFeel® 73°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 1%
Chevron down
Mostly clear

WindENE 5 mph

Air QualityFair

Wind Gusts9 mph

Humidity89%

Indoor Humidity89% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

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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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