Air Quality in Helena, United States

Cloudy
4.0°C · 79.9% humidity
4.0°
Feels 0.6°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast

Nearby Monitoring Stations

AQI Forecast
27 5am
27
27
25 8am
25
25
25 11am
25
25
25 2pm
25
25
25 5pm
24
25
25 8pm
25
25
25 11pm
25
25
25 2am
25
25
AD 728×90

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.

79.9%
Humidity
14.3 km/h
Wind WSW
1018.6 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
PM2.5
25
5.9 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

Temperature & Precipitation

PM2.55.9 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
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: 4.7°C
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T14:36 UTC.