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St. Charles, MO

81° F
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St. Charles, MO Weather
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Today

 Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities

Current Weather

4:27 PM

81°F
RealFeel® 84°
RealFeel Shade™ 84°
Air Quality Fair
Wind NNE 3 mph
Wind Gusts 5 mph
Cloudy More Details

Current Air Quality

Today

8/9

31
AQI

Fair

The air quality is generally acceptable for most individuals. However, sensitive groups may experience minor to moderate symptoms from long-term exposure.

Based on Current Pollutants

More Details

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Current Air Quality

Our current air quality index (AQI) provides information on the quality of air that you are breathing and its impact on your health. There are at least six different pollutants that we track that impact the cleanliness of air and your health.

Health & Activities
See all
Tree Pollen
Low
The risk of tree pollen symptoms is low.
Ragweed Pollen
Low
The risk for ragweed pollen symptoms is low.
Mold
High
The risk of mold allergy symptoms is high. Remove your shoes as soon as you return inside.
Grass Pollen
Low
The risk of grass pollen symptoms is low.
Dust & Dander
Very High
The risk of dust and dander allergy symptoms is very high. When dusting, use a microfiber cloth to help hold dust instead of pushing it around.
Arthritis
Moderate
The risk of experiencing weather-related arthritis pain is moderate. Stay hydrated and stretch to help avoid arthritis symptoms.
Sinus Pressure
Low
The risk of weather-related sinus pressure is low.
Common Cold
Moderate
The risk of catching a cold is moderate.
Flu
Low
The risk of catching the flu is low.
Migraine
Low
The risk of suffering from a weather-related migraine is low.
Asthma
High
The risk of asthma symptoms is high. Be sure to use HEPA filters in your home to cut down on indoor asthma triggers.
Fishing
Good
Fishing conditions are good. Fishing in the early morning or dusk hours can help you get a catch.
Running
Good
Conditions for running are good. Be sure to wear sunscreen and UV-protective activewear.
Golf
Good
Conditions for golfing are good. Wear sunscreen while out on the course.
Biking & Cycling
Good
Conditions for cycling are good. Stay hydrated to make the most of your ride.
Beach & Pool
Good
Conditions for a day at the beach or pool are good. Be sure to wear sunscreen and UV-protective clothing when spending time outdoors.
Stargazing
Poor
Conditions for stargazing are poor.
Hiking
Good
Conditions for hiking are good. Stay hydrated and bring enough water to last the entire hike.
Lawn Mowing
Fair
Conditions for lawn mowing are fair. Be sure only to cut off 1/3 of the total height of your grass when mowing.
Composting
Great
Composting conditions are great. Ensure any food scraps are covered with dry leaves or wood chips to help avoid attracting pests.
Outdoor Entertaining
Ideal
Conditions for outdoor entertaining will be ideal. Be sure to wear sunscreen when spending time outdoors.
Air Travel
Ideal
Conditions for flying are ideal. Have a safe trip.
Driving
Ideal
Conditions for driving are ideal.
Mosquitos
Extremely High
The risk for mosquito activity are extremely high. Wear long-sleeved shirts and pants when spending time outdoors to prevent bites.
Indoor Pests
Extremely High
The risk for pest activity is extremely high. Keep windows and doors closed or ensure you have screens when open to prevent entry into your home.
Outdoor Pests
Extremely High
The risk for pest activity is extremely high. Eliminate standing water in rain gutters, buckets, and in tires where pests can breed.
See all

TODAY’S WEATHER FORECAST

8/9
83°Hi
RealFeel® 84°
Cloudy and not as warm

TONIGHT’S WEATHER FORECAST

8/9
67°Lo
RealFeel® 67°
Partly cloudy and humid

TOMORROW’S WEATHER FORECAST

8/10
84°/ 62°
RealFeel® 91°
Mostly sunny

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Weather Near St. Charles:

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