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St. Louis, MO Weather
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Today

 Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities

Current Weather

4:03 PM

71°F
RealFeel® 71°
RealFeel Shade™ 69°
Air Quality Fair
Wind ESE 5 mph
Wind Gusts 9 mph
Cloudy More Details

Current Air Quality

Today

5/24

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
Moderate
The risk of dust and dander allergy symptoms is moderate. Closing your windows on windy days can help prevent outside dust or dander from getting into your home.
Arthritis
Moderate
The risk of experiencing weather-related arthritis pain is moderate. Stay hydrated and stretch to help avoid arthritis symptoms.
Sinus Pressure
Moderate
The risk of weather-related sinus pressure is moderate. Make sure you stay hydrated.
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
Moderate
The risk of asthma symptoms is moderate.
Fishing
Good
Fishing conditions are good. Fishing in the early morning or dusk hours can help you get a catch.
Running
Great
Conditions for running are great. Be sure to warm up and cool down adequately.
Golf
Ideal
Conditions for golfing are ideal.
Biking & Cycling
Ideal
Conditions for cycling are ideal.
Beach & Pool
Fair
Conditions for a day at the beach or pool are fair. Temperatures tend to be highest in the mid-afternoon if the day is on the cooler side.
Stargazing
Poor
Conditions for stargazing are poor.
Hiking
Great
Conditions for hiking are great. Wear sunscreen and UV-protective clothing.
Lawn Mowing
Ideal
Conditions for lawn mowing are ideal. Try to water your grass at least one inch every week to keep it strong in case of a drought.
Composting
Good
Composting conditions are good. Make sure you frequently add water to your compost to keep it moist.
Outdoor Entertaining
Great
Conditions for outdoor entertaining will be great. Pay attention to the mosquito or pest forecast and prepare deterrents.
Air Travel
Ideal
Conditions for flying are ideal. Have a safe trip.
Driving
Good
Conditions for driving are good. Stay alert of any changes to the weather forecast.
Mosquitos
Moderate
The risk for mosquito activity are moderate. Eliminate any standing water on your property where mosquitoes can breed.
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
High
The risk for pest activity is high. Replacing outdoor lights with yellow bug lights can attract less insects.
See all

TODAY’S WEATHER FORECAST

5/24
74°Hi
RealFeel® 72°
Cloudy

TONIGHT’S WEATHER FORECAST

5/24
67°Lo
RealFeel® 62°
Some rain and a t-storm

TOMORROW’S WEATHER FORECAST

5/25
77°/ 64°
RealFeel® 76°
A gusty t-storm in the p.m.

Looking Ahead

Thunderstorms, some heavy, tomorrow afternoon through tomorrow evening

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  • O'Fallon, MO ;
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