Air Quality in Johnston, United States

Partly Cloudy
25.6°C · 58.0% humidity
25.6°
Feels 25.6°
27
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast

Nearby Monitoring Stations

AQI Forecast
27 5pm
27
27
27 8pm
49
50
51 11pm
52
33
26 2am
26
27
27 5am
27
27
25 8am
25
24
24 11am
25
25
25 2pm
25
25
AD 728×90

Air Quality Index Trend

29h · 1 stn

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

58.0%
Humidity
24.1 km/h
Wind NNE
1019.3 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
27
6.5 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Johnston?

Temperature & Precipitation

PM2.5 Trend

29h · 1 station
PM2.56.5 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX5.9
High
AD 300×250

What is the 7-day forecast for Johnston?

08-03
28.4° 14.6°
0.5 mm
08-04
37.1° 12.9°
08-05
33.8° 13.4°
2.0 mm
08-06
43.2° 20.4°
0.06 mm
08-07
31.7° 16.6°
0.5 mm
08-08
42.6° 16.8°
0.31 mm
08-09
39.1° 24.8°
0.25 mm
Both models agree Avg diff: 5.4°C

Where are air quality stations near Johnston?

76
Carpenter, Des Moines, Iowa, USA
9.0 km PM2.5: 24.0 µg/m³
42
Carpenter, Des Moines, Iowa, USA
9.0 km PM2.5: 10.1 µg/m³

What cities are near Johnston?

31 Urbandale 31 Clive 31 Ankeny 31 West Des Moines 27 Des Moines 31 Waukee 27 Altoona 34 Indianola 48 Ames 33 Marshalltown
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T01:02 UTC.