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Sweltering 90-100 F heat to expand, affect 170 million in central and eastern US. Details here Chevron right
Severe storms sweep Northeast, teen struck by lightning in Central Park. Read more Chevron right

St Charles, MO

91°F
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Winter Center
Today Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities
Saturday, June 21

Day

6/21
98°Hi
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
RealFeel Shade™ 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
Breezy in the morning; very hot and humid with blazing sunshine; caution advised if outside for extended periods of time
alerts

Extreme Heat Watch

12:00 PM Saturday - 9:00 PM Tuesday

Max UV Index11 (Extreme)

AccuLumen Brightness Index™10 (Very Bright)

WindSSW 14 mph

Wind Gusts27 mph

Probability of Precipitation1%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover0%

Morning

Afternoon

Night

6/21
76°Lo
RealFeel® 79°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Clear, very warm and humid
alerts

Extreme Heat Watch

12:00 PM Saturday - 9:00 PM Tuesday

WindSSW 8 mph

Wind Gusts21 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover0%

Evening

Overnight

Sun & Moon

14 hrs 53 mins
Rise 5:37 AM
Set 8:30 PM
Waning Crescent
Rise 2:11 AM
Set 4:37 PM

Temperature History

6/21
High
Low
Forecast
98°
76°
Average
87°
69°
Last Year
95°
74°
Record
99°
1988
49°
1961

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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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