Air Quality in St. Marys, United States
Windy
34.9°C · 44.7% humidity
34.9°
Feels 39.2°
38
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
St. Marys's air quality — share it
AQI Forecast
25
7pm
24
24
38
10pm
34
32
30
1am
29
28
27
4am
26
26
26
7am
25
25
25
10am
25
25
25
1pm
25
25
25
4pm
27
25
Air Quality Index Trend
28h · 3 stnSt. Marys's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
44.7%
Humidity
52.0 km/h
Wind SSW
1013.6 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
9.0 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for St. Marys?
Temperature & Precipitation
PM2.5 Trend
28h · 3 stationsPM2.59.0 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.2
Moderate
What is the 7-day forecast for St. Marys?
08-03
34.9° 24.8°
17.56 mm
08-04
30.7° 25.7°
14.44 mm
08-05
35.4° 25.8°
08-06
31.8° 25.3°
08-07
30.8° 24.4°
3.31 mm
08-08
31.1° 25.3°
1.75 mm
08-09
32.2° 25.3°
0.31 mm
Both models agree
Avg diff: 1.2°C
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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 2026-08-08T02:04 UTC.