Hourly Weather | Today Wednesday, April 29, 2026
Great Falls, Montana
4 PM
Cloudy Weather
57°
Feels Like 57°
1
Humidity: 28%
UV Index: 2
Wind: 9 mph
5 PM
Cloudy Weather
57°
Feels Like 55°
1
Humidity: 28%
UV Index: 2
Wind: 10 mph
6 PM
Cloudy Weather
55°
Feels Like 52°
1
Humidity: 30%
UV Index: 1
Wind: 9 mph
7 PM
Cloudy Weather
54°
Feels Like 50°
1
Humidity: 32%
UV Index: 1
Wind: 9 mph
8 PM
Cloudy Weather
50°
Feels Like 46°
0
Humidity: 37%
UV Index: 0
Wind: 8 mph
9 PM
Cloudy Night
46°
Feels Like 45°
0
Humidity: 42%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
45°
Feels Like 41°
0
Humidity: 48%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
41°
Feels Like 37°
0
Humidity: 55%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.52 µg/m³
  • PM10: 0.78 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.53 µg/m³
  • PM10: 0.75 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.54 µg/m³
  • PM10: 0.74 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.57 µg/m³
  • PM10: 0.82 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.67 µg/m³
  • PM10: 0.97 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.75 µg/m³
  • PM10: 1.13 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.81 µg/m³
  • PM10: 1.26 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.89 µg/m³
  • PM10: 1.37 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.3 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.