Get a monitor and contributor to air quality data in your city.
Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
Air quality in Saint Charles
Air quality index (AQI) and PM2.5 air pollution in Saint Charles
126 people follow this city
Saint Charles Air Quality Map
Real-time Saint Charles air pollution map
AIR QUALITY DATA CONTRIBUTORS
Anonymous contributor
See all
Pollen
What is the pollen count in Saint Charles today?
 | Index | Very high | |
 | Tree pollen | Very high | |
 | Grass pollen | Low | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in Saint Charles?
| Weather | Clear sky |
| Temperature | 80.6°F |
| Humidity | 32% |
| Wind | 10.4 mp/h |
| Pressure | 29.9 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Corpus Christi, Texas | 96 |
| 2 | Duluth, Minnesota | 95 |
| 3 | San Bernardino, California | 94 |
| 4 | Claremont, California | 90 |
| 5 | Hot Springs, South Dakota | 87 |
| 6 | La Verne, California | 84 |
| 7 | Fontana, California | 83 |
| 8 | San Gabriel, California | 83 |
| 9 | Riverside, California | 81 |
| 10 | North Hollywood, California | 80 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
live Saint Charles aqi ranking
Real-time Saint Charles air quality ranking
| # | station | US AQI |
|---|---|---|
| 1 | Orchard Farm | 37 |
| 2 | Cottleville Weldon Spring | 32 |
(local time)
SEE WORLD AQI RANKING
US AQI
38
live AQI index
Good
Overview
What is the current air quality in Saint Charles?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 38 US AQI | O3 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 6µg/m³ | |
| O3 | 92µg/m³ | |
!
PM2.5
x1.2
PM2.5 concentration in Saint Charles is currently 1.2 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in Saint Charles?
 | Enjoy outdoor activities |
 | Open your windows to bring clean, fresh air indoors GET A MONITOR |
Forecast
Saint Charles air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Thursday, May 9 | Good 31 AQI US |  | 69.8° 48.2° |  11.2 mp/h |
| Friday, May 10 | Good 34 AQI US | | 75.2° 53.6° | 11.2 mp/h |
| Saturday, May 11 | Good 34 AQI US | | 80.6° 55.4° | 11.2 mp/h |
| Today | Good 38 AQI US | | 80.6° 55.4° | 11.2 mp/h |
| Monday, May 13 | Good 45 AQI US |  100% | 71.6° 60.8° | 13.4 mp/h |
| Tuesday, May 14 | Moderate 51 AQI US  | 100% | 68° 51.8° | 15.7 mp/h |
| Wednesday, May 15 | Good 41 AQI US | | 71.6° 46.4° | 8.9 mp/h |
| Thursday, May 16 | Moderate 51 AQI US | 100% | 73.4° 55.4° | 6.7 mp/h |
| Friday, May 17 | Moderate 75 AQI US | 100% | 69.8° 62.6° | 4.5 mp/h |
| Saturday, May 18 | Moderate 68 AQI US |  | 77° 59° | 4.5 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
How to best protect from air pollution?
Saint Charles air quality data attribution
1Contributor
- 1 Anonymous contributor
1 station
Anonymous Contributor
Data validated and calibrated by IQAirWhere is the cleanest air quality in Saint Charles?
AQI US, Metric