Hourly Weather | Today Tuesday, July 21, 2026
Bozeman, Montana
2 AM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 55%
UV Index: 0
Wind: 8 mph
3 AM
Cloudy Night
63°
Feels Like 61°
0
Humidity: 59%
UV Index: 0
Wind: 8 mph
4 AM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 62%
UV Index: 0
Wind: 8 mph
5 AM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 66%
UV Index: 0
Wind: 7 mph
6 AM
Cloudy Weather
59°
Feels Like 57°
0
Humidity: 69%
UV Index: 0
Wind: 7 mph
7 AM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 65%
UV Index: 1
Wind: 6 mph
8 AM
Cloudy Weather
64°
Feels Like 66°
7
Humidity: 59%
UV Index: 2
Wind: 7 mph
9 AM
Cloudy Weather
68°
Feels Like 70°
7
Humidity: 54%
UV Index: 3
Wind: 7 mph
10 AM
Cloudy Weather
70°
Feels Like 73°
7
Humidity: 51%
UV Index: 4
Wind: 7 mph
11 AM
Cloudy Weather
73°
Feels Like 77°
7
Humidity: 47%
UV Index: 4
Wind: 7 mph
12 PM
Cloudy Weather
75°
Feels Like 79°
7
Humidity: 44%
UV Index: 4
Wind: 7 mph
1 PM
Cloudy Weather
79°
Feels Like 82°
5
Humidity: 41%
UV Index: 6
Wind: 8 mph
2 PM
Cloudy Weather
81°
Feels Like 86°
0
Humidity: 38%
UV Index: 7
Wind: 8 mph
3 PM
Cloudy Weather
81°
Feels Like 86°
0
Humidity: 37%
UV Index: 6
Wind: 8 mph
4 PM
Cloudy Weather
82°
Feels Like 84°
0
Humidity: 36%
UV Index: 4
Wind: 8 mph
5 PM
Cloudy Weather
82°
Feels Like 82°
0
Humidity: 35%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
81°
Feels Like 79°
0
Humidity: 37%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
79°
Feels Like 77°
3
Humidity: 39%
UV Index: 1
Wind: 8 mph
8 PM
Cloudy Weather
77°
Feels Like 75°
7
Humidity: 43%
UV Index: 0
Wind: 8 mph
9 PM
Cloudy Weather
75°
Feels Like 72°
7
Humidity: 48%
UV Index: 0
Wind: 8 mph
10 PM
Cloudy Night
72°
Feels Like 68°
7
Humidity: 54%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Night
70°
Feels Like 66°
7
Humidity: 57%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.35 µg/m³
  • PM10: 17.56 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 AM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.37 µg/m³
  • PM10: 17.58 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 AM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.36 µg/m³
  • PM10: 17.57 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 AM
62 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.45 µg/m³
  • PM10: 17.66 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 AM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.3 µg/m³
  • PM10: 17.51 µg/m³
  • O3: 0.034 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 AM
60 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.77 µg/m³
  • PM10: 16.99 µg/m³
  • O3: 0.031 ppm
  • NO2: 1.2 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

8 AM
59 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.15 µg/m³
  • PM10: 16.38 µg/m³
  • O3: 0.029 ppm
  • NO2: 1.5 ppb
  • SO2: 0 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

9 AM
58 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.56 µg/m³
  • PM10: 15.8 µg/m³
  • O3: 0.030 ppm
  • NO2: 1.5 ppb
  • SO2: 0 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 AM
55 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.12 µg/m³
  • PM10: 14.51 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 AM
52 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.12 µg/m³
  • PM10: 13.54 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.6 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

12 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.37 µg/m³
  • PM10: 12.83 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.4 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

1 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.9 µg/m³
  • PM10: 10.64 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

2 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.15 µg/m³
  • PM10: 9.96 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

3 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.99 µg/m³
  • PM10: 9.77 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.24 µg/m³
  • PM10: 10.06 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.02 µg/m³
  • PM10: 9.83 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.38 µg/m³
  • PM10: 9.13 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.38 µg/m³
  • PM10: 8.01 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.4 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.55 µg/m³
  • PM10: 7.06 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.98 µg/m³
  • PM10: 6.42 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.48 µg/m³
  • PM10: 5.85 µg/m³
  • O3: 0.039 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.26 µg/m³
  • PM10: 5.59 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.1 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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