Air Quality in Helena, United States
Clear
30.5°C · 24.7% humidity
30.5°
Feels 30.5°
75
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Model forecast
Nearby Monitoring Stations
Helena's air quality — share it
AQI Forecast
54
2pm
66
66
75
5pm
72
71
69
8pm
68
68
67
11pm
55
55
54
2am
54
54
54
5am
54
27
27
8am
34
27
27
11am
27
27
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. Current PM2.5 concentration in Helena is 1.6× the WHO 24-hour guideline of 15 µg/m³.
24.7%
Humidity
26.8 km/h
Wind ESE
1005.6 hPa
Pressure
9.4
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
23.6 µg/m³
PM10
98.05 µg/m³
050100150200300500
What is the weather forecast for Helena?
Temperature & Precipitation
PM2.523.6 µg/m³
×1.6 WHO
Moderate
PM1098.05 µg/m³
Moderate
UV INDEX9.4
Very High
What is the 7-day forecast for Helena?
08-03
36.6° 14.6°
08-04
29.2° 10.9°
08-05
35.8° 15.1°
08-06
38.6° 7.9°
08-07
31.0° 10.6°
0.06 mm
08-08
34.3° 13.9°
08-09
34.3° 12.6°
Both models agree
Avg diff: 4.2°C
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-07T23:54 UTC.