Air Quality in Johnstown, United States
Windy
24.4°C · 34.8% humidity
24.4°
Feels 24.4°
30
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Johnstown's air quality — share it
AQI Forecast
25
7pm
25
25
30
10pm
29
28
27
1am
26
26
26
4am
25
25
25
7am
24
25
25
10am
25
25
25
1pm
27
27
27
4pm
27
27
Air Quality Index Trend
34h · 1 stnJohnstown's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
34.8%
Humidity
49.8 km/h
Wind NW
1013.4 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
7.1 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Johnstown?
Temperature & Precipitation
PM2.5 Trend
34h · 1 stationPM2.57.1 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.2
Moderate
What is the 7-day forecast for Johnstown?
08-03
24.4° 18.6°
6.88 mm
08-04
30.5° 14.0°
0.31 mm
08-05
31.2° 13.0°
4.63 mm
08-06
29.0° 17.6°
0.06 mm
08-07
28.9° 16.7°
2.19 mm
08-08
30.6° 18.4°
1.69 mm
08-09
33.1° 20.5°
Both models agree
Avg diff: 3.2°C
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T02:57 UTC.