Air Quality in Johnstown, United States
Drizzle
7.6°C · 97.0% humidity
7.6°
Feels 1.9°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Johnstown's air quality — share it
AQI Forecast
25
1am
24
24
25
4am
24
24
24
7am
24
25
25
10am
25
25
27
1pm
27
27
27
4pm
27
27
27
7pm
25
25
24
10pm
24
24
Air Quality Index Trend
43h · 3 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.
97.0%
Humidity
57.2 km/h
Wind W
1005.6 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
5.9 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Johnstown?
Temperature & Precipitation
PM2.5 Trend
43h · 3 stationsPM2.55.9 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
What is the 7-day forecast for Johnstown?
06-09
30.0° 7.6°
1.13 mm
06-10
22.0° 15.8°
12.13 mm
06-11
24.5° 6.7°
06-12
28.0° 15.6°
0.75 mm
06-13
23.1° 19.2°
13.31 mm
06-14
22.3° 14.1°
0.69 mm
06-15
21.3° 14.6°
0.13 mm
Both models agree
Avg diff: 4.8°C
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T08:03 UTC.