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 stn

Helena'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
PM2.5▲
38
9.1 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

Temperature & Precipitation

PM2.5 Trend

44h · 2 stations
PM2.59.1 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.0
Low
9.1
Median
9.1
Average
9.1
Low
9.1
High
PM2.5 µg/m³ · Model: 8.2 · Bias: -0.9
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°
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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.