Air Quality in Helena, United States
Windy
33.1°C · 12.7% humidity
33.1°
Feels 33.1°
24
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Helena's air quality — share it
AQI Forecast
24
3pm
24
24
24
6pm
25
25
25
9pm
25
25
25
12am
25
27
25
3am
27
27
27
6am
27
25
25
9am
25
25
25
12pm
25
25
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 1.2× the WHO annual guideline of 5 µg/m³.
12.7%
Humidity
71.2 km/h
Wind WNW
1013.5 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
5.8 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Helena?
Temperature & Precipitation
PM2.55.8 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.9
Moderate
What is the 7-day forecast for Helena?
05-29
33.1° 4.0°
05-30
31.6° 10.5°
05-31
31.6° 13.5°
06-01
30.5° 4.9°
3.31 mm
06-02
15.7° 4.1°
06-03
24.3° 3.5°
06-04
25.0° 11.4°
0.25 mm
Both models agree
Avg diff: 5.3°C
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T00:19 UTC.