What is the air quality in Saint Charles today?

The current Air Quality Index (AQI) in Saint Charles is 17 (Good). PM2.5 concentration is 4.1 µg/m³.

What is the temperature in Saint Charles right now?

The current temperature in Saint Charles is 12.1°C (feels like 12.1°C). Humidity is 73.8% and wind speed is 39.7 km/h.

Is it safe to go outside in Saint Charles?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Saint Charles, United States

Cloudy

12.1°C · 73.8% humidity

12.1°

Feels 12.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

46h · 19 stn

View full history →

Saint Charles's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

73.8%

Humidity

39.7 km/h

Wind NNE

1026.5 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

4.1 µg/m³

PM10▲

27.4 µg/m³

050100150200300500

What is the weather forecast for Saint Charles?

Temperature & Precipitation

PM2.5 Trend

46h · 19 stations

PM2.54.1 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

Station readings (1 station within 25 km)

4.1

Median

4.1

Average

4.1

Low

4.1

High

PM2.5 µg/m³ · Model: 8.2 · Bias: +4.1

What is the 7-day forecast for Saint Charles?

10-21

24.0° 7.2°

10-22

21.4° 11.3°

10-23

17.9° 7.4°

0.44 mm

10-24

15.9° 10.9°

0.5 mm

10-25

21.3° 7.0°

0.06 mm

10-26

16.7° 12.7°

27.19 mm

10-27

13.5° 8.4°

22.19 mm

Both models agree Avg diff: 3.5°C

Where are air quality stations near Saint Charles?

Lee District Park - Fairfax County, Northern Virginia, USA

23.8 km PM2.5: 4.8 µg/m³

Lee District Park - Fairfax County, Northern Virginia, USA

23.8 km PM2.5: 4.1 µg/m³

What cities are near Saint Charles?

17 St. Charles 18 Waldorf 20 Fort Washington 19 Fort Hunt 20 Clinton 18 Hybla Valley 20 Oxon Hill-Glassmanor 20 Camp Springs 20 Oxon Hill 20 Glassmanor

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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-21T00:35 UTC.