Air Quality in Helena, United States
Rain
34.2°C · 45.9% humidity
34.2°
Feels 38.4°
29
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Helena's air quality — share it
AQI Forecast
27
7am
27
27
29
10am
25
25
25
1pm
25
25
25
4pm
25
25
27
7pm
27
34
34
10pm
34
34
34
1am
34
34
34
4am
34
34
Air Quality Index Trend
45h · 2 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.
45.9%
Humidity
19.3 km/h
Wind SW
1018.5 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
7.0 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Helena?
Temperature & Precipitation
PM2.5 Trend
45h · 2 stationsPM2.57.0 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX12.9
Extreme
Station readings (1 station within 25 km)
7.0
Median
7.0
Average
7.0
Low
7.0
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -1.0
What is the 7-day forecast for Helena?
09-05
34.2° 22.5°
4.44 mm
09-06
33.3° 23.4°
1.56 mm
09-07
24.7° 22.4°
10.69 mm
09-08
27.3° 18.0°
0.19 mm
09-09
32.4° 18.3°
2.25 mm
09-10
38.8° 19.8°
1.37 mm
09-11
34.9° 22.3°
1.56 mm
Both models agree
Avg diff: 3.1°C
Where are air quality stations near Helena?
What cities are near Helena?
Get AQI alerts for Helena
Notify me when air quality reaches:
Free · No account · Unsubscribe any time
Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-09-05T15:50 UTC.