Air Quality in Helena, United States
Partly Cloudy
22.9°C · 55.7% humidity
22.9°
Feels 22.9°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
AQI Forecast
27
6pm
27
54
36
9pm
41
45
47
12am
49
51
52
3am
52
53
53
6am
53
34
54
9am
54
54
54
12pm
54
54
54
3pm
54
34
Air Quality Index Trend
46h · 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.
55.7%
Humidity
32.8 km/h
Wind N
1012.7 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
8.6 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Helena?
Temperature & Precipitation
PM2.5 Trend
46h · 3 stationsPM2.58.6 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
8.6
Median
8.6
Average
8.6
Low
8.6
High
PM2.5 µg/m³ · Model: 9.75 · Bias: +1.1
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
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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 2026-06-09T02:04 UTC.