Great Falls air quality · Montana, United States
This is what breathable city air is supposed to feel like
US AQI 21 (Good) in Great Falls, from 1 AirNow monitoring station. Main pollutant: PM2.5.
Updated
Pollutants in Great Falls
- PM2.521AQI
US values are per-pollutant AQI from the highest-reading monitor near Great Falls (Great Falls).
Is it safe outside in Great Falls right now?
Air quality is satisfactory and poses little or no risk.
Walking and commuting
Go aheadEnjoy it.
Running and jogging
Go aheadA great time to run outdoors.
Cycling
Go aheadRide freely.
Children playing outside
Go aheadNo limits.
Older adults and heart or lung conditions
Go aheadNo limits.
Open windows
Go aheadAir out your home.
Mask outdoors
Not neededNot needed.
Air purifier indoors
Not neededNot needed.
Based on the US EPA Air Quality Guide, applied to the current US AQI category. If you have symptoms, follow your doctor's advice.
What US AQI 0–50 means for your health →
Great Falls air quality history
Daily average, 35 days- 42average daily US AQI over 35 days
- 59worst day, 25 September
- 8cleanest day, 12 October
- 0days at Unhealthy or worse
The last 7 days averaged 18, better than the week before (37). 23 of the last 35 days were Good.
Weather in Great Falls
No active National Weather Service alerts for Great Falls.
| Day | Forecast | High | Low | Rain |
|---|---|---|---|---|
| Mon 19 | Sunny | 72°F | 39°F | 0% |
| Tue 20 | Mostly Sunny | 57°F | 37°F | 0% |
| Wed 21 | Sunny | 72°F | 45°F | 0% |
| Thu 22 | Mostly Sunny | 72°F | 45°F | 60% |
| Fri 23 | Rain | 52°F | 36°F | 75% |
| Sat 24 | Mostly Sunny | 45°F | 30°F | 12% |
| Sun 25 | Slight Chance Light Snow | 45°F | 28°F | 22% |
National Weather Service forecast. All US weather alerts →
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Great Falls air quality: common questions
What is the AQI in Great Falls right now?
The US AQI in Great Falls is 21 (Good). The main pollutant is PM2.5.
Is it safe to go outside in Great Falls today?
A great time to be outside. Air quality is satisfactory and poses little or no risk. For runners: A great time to run outdoors.
How has air quality in Great Falls been recently?
Over the last 35 days with data, Great Falls averaged US AQI 42. The worst day was 25 September at 59; the cleanest was 12 October at 8. 0 days were at Unhealthy or worse.
Where does Great Falls's air quality data come from?
From US EPA AirNow, using 1 monitoring station in and around the city. Good Air does not estimate or adjust these readings.
Source: US EPA AirNow. Readings are published by the monitoring agency and may be revised.