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100-degree heat dome to set up shop over southern US. Get the forecast Chevron right

Ballwin, MO

87°F
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Ballwin

Missouri

87°
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Ballwin, MO Weather
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Today

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4 PM

86°
RealFeel® 97°
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 40%
Chevron down
Mostly cloudy
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

RealFeel Shade™91°

WindS 6 mph

Air QualityPoor

Max UV Index4 (Moderate)

Wind Gusts7 mph

Humidity66%

Indoor Humidity66% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

84°
RealFeel® 94°
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 74%
Chevron down
Rain
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

RealFeel Shade™91°

WindS 6 mph

Air QualityPoor

Max UV Index2 (Low)

Wind Gusts7 mph

Humidity80%

Indoor Humidity80% (Dangerously Humid)

Dew Point78° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Rain0.12 in

Visibility4 mi

Cloud Ceiling30000 ft

6 PM

82°
RealFeel® 92°
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 49%
Chevron down
Mostly cloudy
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

RealFeel Shade™89°

WindSE 6 mph

Air QualityFair

Max UV Index2 (Low)

Wind Gusts7 mph

Humidity81%

Indoor Humidity81% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

79°
RealFeel® 87°
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 74%
Chevron down
Rain
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

RealFeel Shade™87°

WindESE 6 mph

Air QualityFair

Max UV Index1 (Low)

Wind Gusts7 mph

Humidity95%

Indoor Humidity95% (Dangerously Humid)

Dew Point78° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover76%

Rain0.12 in

Visibility4 mi

Cloud Ceiling30000 ft

8 PM

79°
RealFeel® 86°
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 4%
Chevron down
Mostly sunny
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

RealFeel Shade™86°

WindSE 7 mph

Air QualityFair

Max UV Index0 (Low)

Wind Gusts13 mph

Humidity86%

Indoor Humidity86% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

78°
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 1%
Chevron down
Mostly clear
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

WindSE 6 mph

Air QualityFair

Wind Gusts13 mph

Humidity91%

Indoor Humidity91% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover16%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

76°
RealFeel® 83°
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 1%
Chevron down
Mostly clear
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

WindSE 6 mph

Air QualityFair

Wind Gusts13 mph

Humidity95%

Indoor Humidity95% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

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

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

WindSE 6 mph

Air QualityFair

Wind Gusts12 mph

Humidity97%

Indoor Humidity95% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

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World North America United States Missouri Ballwin

Weather Near Ballwin:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
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