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O'Fallon, MO

70° F
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O'Fallon, MO Weather
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Winter Center

Today

 Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities

Current Weather

12:42 AM

70°F
RealFeel® 72°
Air Quality Excellent
Wind NNE 1 mph
Wind Gusts 1 mph
Clear More Details

Current Air Quality

Today

8/10

19
AQI

Excellent

The air quality is ideal for most individuals; enjoy your normal outdoor activities.

Based on Current Pollutants

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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
Low
The risk of experiencing weather-related arthritis pain is low.
Sinus Pressure
Low
The risk of weather-related sinus pressure is low.
Common Cold
Low
The risk of catching a cold is low.
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
Fair
Fishing conditions are fair.
Running
Good
Conditions for running are good. Be sure to wear sunscreen and UV-protective activewear.
Golf
Great
Conditions for golfing are great. Stay hydrated when spending time in the sun.
Biking & Cycling
Great
Conditions for cycling are great. Be sure you have the correct gear to keep your core temperature warm during winter months and cool during hot weather.
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
Fair
Conditions for stargazing are fair. On cloudy nights, you may still be able to see the moon and some brighter stars, depending on the season.
Hiking
Good
Conditions for hiking are good. Stay hydrated and bring enough water to last the entire hike.
Lawn Mowing
Good
Conditions for lawn mowing are good. Alternating mowing patterns can help all areas of your lawn grow.
Composting
Good
Composting conditions are good. Make sure you frequently add water to your compost to keep it moist.
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

8/10
83°Hi
RealFeel® 89°
More sun than clouds

TONIGHT’S WEATHER FORECAST

8/10
60°Lo
RealFeel® 60°
Clear

TOMORROW’S WEATHER FORECAST

8/11
84°/ 65°
RealFeel® 90°
Nice with plenty of sunshine

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Weather Near O'Fallon:

  • St. Charles, MO
  • St. Louis, MO
  • St. Peters, MO
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