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St. Charles, MO

81°F
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St. Charles

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81°
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St. Charles, MO Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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7 PM

85°
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 47%
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Mostly cloudy

RealFeel Shade™92°

Heat Index92°

WindS 7 mph

Air QualityFair

Max UV Index0.7 (Low)

Wind Gusts10 mph

Humidity69%

Indoor Humidity69% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover87%

Visibility10 mi

Cloud Ceiling30000 ft

8 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 34%
Chevron down
Mostly cloudy

RealFeel Shade™88°

Heat Index89°

WindSE 8 mph

Air QualityFair

Max UV Index0.2 (Low)

Wind Gusts8 mph

Humidity70%

Indoor Humidity70% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling24900 ft

9 PM

81°
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 34%
Chevron down
Mostly cloudy

Heat Index86°

WindSSE 8 mph

Air QualityFair

Wind Gusts8 mph

Humidity76%

Indoor Humidity76% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover87%

Visibility10 mi

Cloud Ceiling19800 ft

10 PM

79°
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 40%
Chevron down
Cloudy

Heat Index80°

WindSSE 8 mph

Air QualityFair

Wind Gusts8 mph

Humidity81%

Indoor Humidity81% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover97%

Visibility10 mi

Cloud Ceiling14700 ft

11 PM

78°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
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rain drop 67%
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Thunderstorms

WindSSE 8 mph

Air QualityFair

Wind Gusts9 mph

Humidity83%

Indoor Humidity83% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover99%

Rain0.16 in

Visibility4 mi

Cloud Ceiling2000 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 85° with a RealFeel® of 92°, mostly cloudy with a 47% 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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Weather Near St. Charles:

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