Air Quality in Helena, United States
Cloudy
14.6°C · 81.3% humidity
14.6°
Feels 14.6°
38
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
AQI Forecast
54
9pm
54
54
38
12am
43
46
48
3am
50
51
52
6am
52
33
53
9am
53
54
54
12pm
54
54
54
3pm
54
34
34
6pm
34
54
Air Quality Index Trend
47h · 3 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.
81.3%
Humidity
13.3 km/h
Wind N
1013.8 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
9.1 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Helena?
Temperature & Precipitation
PM2.5 Trend
47h · 3 stationsPM2.59.1 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
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: 9.75 · Bias: +0.6
What is the 7-day forecast for Helena?
06-09
30.0° 14.6°
0.31 mm
06-10
34.3° 22.8°
0.13 mm
06-11
28.3° 22.3°
0.19 mm
06-12
35.2° 22.1°
6.13 mm
06-13
23.2° 21.1°
47.62 mm
06-14
32.3° 19.3°
06-15
32.6° 22.1°
4.13 mm
Both models agree
Avg diff: 2.7°C
Where are air quality stations 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 2026-06-09T05:57 UTC.