Air Quality in Helena, United States
Partly Cloudy
16.9°C · 57.9% humidity
16.9°
Feels 16.9°
38
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
AQI Forecast
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Air Quality Index Trend
44h · 2 stnHelena's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
57.9%
Humidity
18.1 km/h
Wind NNE
1020.0 hPa
Pressure
0.0
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
9.1 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Helena?
Temperature & Precipitation
PM2.5 Trend
44h · 2 stationsPM2.59.1 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.0
Low
Station readings (1 station within 25 km)
9.1
Median
9.1
Average
9.1
Low
9.1
High
PM2.5 µg/m³ · Model: 8.2 · Bias: -0.9
What is the 7-day forecast for Helena?
10-20
20.8° 3.1°
10-21
26.0° 12.7°
10-22
25.0° 14.9°
10-23
25.1° 10.3°
0.69 mm
10-24
20.8° 13.5°
10-25
20.1° 4.7°
10-26
25.2° 10.0°
Both models agree
Avg diff: 3.6°C
Where are air quality stations near Helena?
What cities are near Helena?
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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 2026-10-20T21:44 UTC.