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St. Charles, MO

94°F
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St. Charles

Missouri

94°
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St. Charles, MO Weather
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3 PM

95°
RealFeel® 112°
Dangerous Heat
RealFeel Guide
Dangerous Heat
108° to 115°
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 7%
Chevron down
Sunny
alerts

Extreme Heat Warning

12:00 PM Sunday - 12:00 AM Friday

RealFeel Shade™104°

Heat Index114°

WindS 9 mph

Air QualityFair

Max UV Index7.6 (Very High)

Wind Gusts18 mph

Humidity63%

Indoor Humidity63% (Dangerously Humid)

Dew Point80° F

AccuLumen Brightness Index™10 (Very Bright)

Cloud Cover3%

Visibility10 mi

Cloud Ceiling33400 ft

4 PM

94°
RealFeel® 108°
Dangerous Heat
RealFeel Guide
Dangerous Heat
108° to 115°
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 7%
Chevron down
Mostly sunny
alerts

Extreme Heat Warning

12:00 PM Sunday - 12:00 AM Friday

RealFeel Shade™102°

Heat Index109°

WindS 9 mph

Air QualityFair

Max UV Index4.9 (Moderate)

Wind Gusts21 mph

Humidity60%

Indoor Humidity60% (Dangerously Humid)

Dew Point78° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

93°
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 7%
Chevron down
Sunny
alerts

Extreme Heat Warning

12:00 PM Sunday - 12:00 AM Friday

RealFeel Shade™99°

Heat Index104°

WindS 9 mph

Air QualityFair

Max UV Index3.4 (Moderate)

Wind Gusts21 mph

Humidity56%

Indoor Humidity56% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover5%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

92°
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 7%
Chevron down
Sunny
alerts

Extreme Heat Warning

12:00 PM Sunday - 12:00 AM Friday

RealFeel Shade™98°

Heat Index103°

WindS 9 mph

Air QualityFair

Max UV Index2.2 (Low)

Wind Gusts21 mph

Humidity59%

Indoor Humidity59% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™10 (Very Bright)

Cloud Cover4%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

90°
RealFeel® 99°
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
Sunny
alerts

Extreme Heat Warning

12:00 PM Sunday - 12:00 AM Friday

RealFeel Shade™97°

Heat Index101°

WindS 8 mph

Air QualityFair

Max UV Index1.2 (Low)

Wind Gusts21 mph

Humidity63%

Indoor Humidity63% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™7 (Bright)

Cloud Cover5%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

87°
RealFeel® 96°
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
Sunny
alerts

Extreme Heat Warning

12:00 PM Sunday - 12:00 AM Friday

RealFeel Shade™96°

Heat Index98°

WindS 8 mph

Air QualityFair

Max UV Index0.3 (Low)

Wind Gusts17 mph

Humidity69%

Indoor Humidity69% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover8%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

85°
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 0%
Chevron down
Mostly clear
alerts

Extreme Heat Warning

12:00 PM Sunday - 12:00 AM Friday

Heat Index94°

WindS 7 mph

Air QualityFair

Wind Gusts15 mph

Humidity75%

Indoor Humidity75% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

83°
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 0%
Chevron down
Mostly clear
alerts

Extreme Heat Warning

12:00 PM Sunday - 12:00 AM Friday

Heat Index91°

WindS 7 mph

Air QualityFair

Wind Gusts13 mph

Humidity79%

Indoor Humidity79% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

82°
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
Clear
alerts

Extreme Heat Warning

12:00 PM Sunday - 12:00 AM Friday

Heat Index88°

WindS 7 mph

Air QualityFair

Wind Gusts12 mph

Humidity82%

Indoor Humidity82% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover9%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for St. Charles

AccuWeather's hourly forecast for St. Charles provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 95° with a RealFeel® of 112°, sunny with a 7% chance of precipitation. Each hourly forecast includes wind speed, humidity, air quality, UV index, and the AccuLumen Brightness Index™, AccuWeather's measure of perceived outdoor light intensity. Forecasts are generated by proprietary systems developed by AccuWeather meteorologists since 1962.

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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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