Air Quality in Johnston, United States

Cloudy
15.0°C · 78.5% humidity
15.0°
Feels 15.0°
8
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast
25 7pm
25
27
8 10pm
13
17
27 1am
29
30
31 4am
52
33
33 7am
26
25
25 10am
25
25
25 1pm
25
25
25 4pm
25
25
AD 728×90

Air Quality Index Trend

46h · 4 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.

78.5%
Humidity
29.3 km/h
Wind SW
999.6 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
PM2.5
8
1.96 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

Temperature & Precipitation

PM2.5 Trend

46h · 4 stations
PM2.51.96 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
1.96
Median
1.9
Average
0.7
Low
3.1
High
PM2.5 µg/m³ · Model: 6.15 · Bias: +4.2
06-09
34.2° 12.5°
0.31 mm
06-10
22.1° 13.8°
1.37 mm
06-11
25.5° 8.4°
06-12
20.9° 14.8°
0.75 mm
06-13
29.0° 14.8°
0.13 mm
06-14
23.4° 8.5°
8.87 mm
06-15
26.0° 12.3°
0.06 mm
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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 2026-06-09T02:11 UTC.