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St. Charles, MO

77°F
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St. Charles

Missouri

77°
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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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1 PM

78°
RealFeel® 80°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 84%
Chevron down
Thunderstorms
alerts

Flash Flood Warning

10:32 AM Monday - 3:30 PM Monday
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™77°

WindSSW 10 mph

Air QualityFair

Max UV Index2.5 (Low)

Wind Gusts16 mph

Humidity80%

Indoor Humidity80% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover99%

Rain0.05 in

Visibility10 mi

Cloud Ceiling7100 ft

2 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 49%
Chevron down
Cloudy
alerts

Flash Flood Warning

10:32 AM Monday - 3:30 PM Monday
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™82°

Heat Index80°

WindSSW 10 mph

Air QualityFair

Max UV Index3.4 (Moderate)

Wind Gusts16 mph

Humidity77%

Indoor Humidity77% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling9600 ft

3 PM

80°
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 49%
Chevron down
Cloudy
alerts

Flash Flood Warning

10:32 AM Monday - 3:30 PM Monday
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™83°

Heat Index84°

WindSSW 10 mph

Air QualityFair

Max UV Index2.7 (Moderate)

Wind Gusts16 mph

Humidity74%

Indoor Humidity74% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling12100 ft

4 PM

80°
RealFeel® 82°
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 64%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™81°

Heat Index84°

WindSSW 10 mph

Air QualityFair

Max UV Index1.0 (Low)

Wind Gusts16 mph

Humidity82%

Indoor Humidity82% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Rain0.16 in

Visibility4 mi

Cloud Ceiling2000 ft

5 PM

79°
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 49%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™82°

Heat Index80°

WindSW 9 mph

Air QualityFair

Max UV Index1.2 (Low)

Wind Gusts16 mph

Humidity78%

Indoor Humidity78% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling12100 ft

6 PM

79°
RealFeel® 79°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 60%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™79°

Heat Index80°

WindSW 9 mph

Air QualityFair

Max UV Index0.5 (Low)

Wind Gusts15 mph

Humidity79%

Indoor Humidity79% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Rain0.16 in

Visibility4 mi

Cloud Ceiling2000 ft

7 PM

78°
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 49%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™83°

Heat Index80°

WindWSW 8 mph

Air QualityFair

Max UV Index0.4 (Low)

Wind Gusts13 mph

Humidity80%

Indoor Humidity80% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling7100 ft

8 PM

76°
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 51%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™77°

WindSSW 7 mph

Air QualityFair

Max UV Index0.1 (Low)

Wind Gusts10 mph

Humidity88%

Indoor Humidity88% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover92%

Rain0.05 in

Visibility5 mi

Cloud Ceiling4000 ft

9 PM

73°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 47%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

WindS 6 mph

Air QualityFair

Wind Gusts9 mph

Humidity96%

Indoor Humidity95% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover91%

Visibility10 mi

Cloud Ceiling4000 ft

10 PM

73°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 40%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

WindSE 6 mph

Air QualityFair

Wind Gusts6 mph

Humidity96%

Indoor Humidity95% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling14700 ft

11 PM

73°
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 33%
Chevron down
Mostly cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

WindSSE 6 mph

Air QualityFair

Wind Gusts6 mph

Humidity97%

Indoor Humidity95% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover88%

Visibility10 mi

Cloud Ceiling12100 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 78° with a RealFeel® of 80°, thunderstorms with a 84% 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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