Air Quality in Johnston, United States
Rain
16.1°C · 95.4% humidity
16.1°
Feels 16.1°
47
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Johnston's air quality — share it
AQI Forecast
27
8pm
27
25
47
11pm
41
36
33
2am
30
28
27
5am
27
27
28
8am
28
28
27
11am
27
27
27
2pm
25
25
25
5pm
25
25
Air Quality Index Trend
18h · 1 stnJohnston's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
95.4%
Humidity
83.6 km/h
Wind E
1017.0 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
11.3 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Johnston?
Temperature & Precipitation
PM2.5 Trend
18h · 1 stationPM2.511.3 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
11.3
Median
11.3
Average
11.3
Low
11.3
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -5.1
What is the 7-day forecast for Johnston?
05-30
22.4° 16.1°
9.75 mm
05-31
28.9° 11.4°
06-01
26.8° 15.6°
7.69 mm
06-02
21.8° 16.9°
2.31 mm
06-03
30.8° 23.3°
06-04
24.5° 16.0°
0.56 mm
06-05
25.5° 14.5°
1.06 mm
Both models agree
Avg diff: 5.4°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 2026-05-30T04:07 UTC.