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

St. Charles, MO

89°F
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St. Charles

Missouri

89°
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St. Charles, MO Weather
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Today

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4 PM

90°
RealFeel® 103°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. 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 8%
Chevron down
Partly sunny
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

RealFeel Shade™96°

WindESE 6 mph

Air QualityPoor

Max UV Index5 (Moderate)

Wind Gusts7 mph

Humidity60%

Indoor Humidity60% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

89°
RealFeel® 101°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. 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 8%
Chevron down
Partly sunny
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

RealFeel Shade™96°

WindE 7 mph

Air QualityPoor

Max UV Index3 (Moderate)

Wind Gusts8 mph

Humidity63%

Indoor Humidity63% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

87°
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 8%
Chevron down
Partly sunny
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

RealFeel Shade™94°

WindE 7 mph

Air QualityPoor

Max UV Index2 (Low)

Wind Gusts8 mph

Humidity67%

Indoor Humidity67% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

86°
RealFeel® 95°
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 5%
Chevron down
Partly sunny
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

RealFeel Shade™92°

WindE 7 mph

Air QualityFair

Max UV Index1 (Low)

Wind Gusts9 mph

Humidity71%

Indoor Humidity71% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™6 (Medium)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

83°
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
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

RealFeel Shade™90°

WindESE 7 mph

Air QualityFair

Max UV Index0 (Low)

Wind Gusts12 mph

Humidity74%

Indoor Humidity74% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

81°
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 clear
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

WindSE 6 mph

Air QualityFair

Wind Gusts12 mph

Humidity81%

Indoor Humidity81% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

10 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 0%
Chevron down
Clear
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

WindSE 6 mph

Air QualityFair

Wind Gusts12 mph

Humidity86%

Indoor Humidity86% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover4%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

77°
RealFeel® 84°
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
Clear
alerts

Extreme Heat Warning

12:00 PM Saturday - 7:00 PM Thursday

WindSE 6 mph

Air QualityFair

Wind Gusts12 mph

Humidity92%

Indoor Humidity92% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover3%

Visibility10 mi

Cloud Ceiling30000 ft

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World North America United States Missouri St. Charles

Weather Near St. Charles:

  • O'Fallon, MO
  • Springfield, IL
  • St. Louis, MO
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