Hourly Weather | Today Tuesday, September 1, 2026
Flagstaff, Arizona
9 AM
Cloudy Weather
57°
Feels Like 61°
6
Humidity: 92%
UV Index: 4
Wind: 8 mph
10 AM
Cloudy Weather
63°
Feels Like 66°
5
Humidity: 67%
UV Index: 6
Wind: 9 mph
11 AM
Cloudy Weather
66°
Feels Like 72°
5
Humidity: 54%
UV Index: 8
Wind: 12 mph
12 PM
Cloudy Weather
72°
Feels Like 75°
8
Humidity: 44%
UV Index: 9
Wind: 12 mph
1 PM
Sunny with a Chance of Thunderstorms
75°
Feels Like 72°
51
Humidity: 41%
UV Index: 3
Wind: 13 mph
2 PM
Cloudy Weather
75°
Feels Like 75°
47
Humidity: 41%
UV Index: 5
Wind: 13 mph
3 PM
Cloudy Weather
75°
Feels Like 75°
35
Humidity: 40%
UV Index: 4
Wind: 13 mph
4 PM
Cloudy Weather
73°
Feels Like 73°
19
Humidity: 42%
UV Index: 3
Wind: 13 mph
5 PM
Cloudy Weather
72°
Feels Like 70°
19
Humidity: 46%
UV Index: 2
Wind: 13 mph
6 PM
Cloudy Weather
70°
Feels Like 66°
24
Humidity: 50%
UV Index: 0
Wind: 10 mph
7 PM
Cloudy Night
64°
Feels Like 63°
34
Humidity: 58%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Night
63°
Feels Like 61°
34
Humidity: 66%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
61°
Feels Like 57°
37
Humidity: 71%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
57°
Feels Like 55°
43
Humidity: 77%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
55°
Feels Like 54°
47
Humidity: 79%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

9 AM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.12 µg/m³
  • PM10: 11.79 µg/m³
  • O3: 0.026 ppm
  • NO2: 3.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

10 AM
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.99 µg/m³
  • PM10: 12.7 µg/m³
  • O3: 0.033 ppm
  • NO2: 3.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

11 AM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.31 µg/m³
  • PM10: 13.51 µg/m³
  • O3: 0.037 ppm
  • NO2: 3.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.58 µg/m³
  • PM10: 15.41 µg/m³
  • O3: 0.043 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.3 µg/m³
  • PM10: 15.68 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.99 µg/m³
  • PM10: 14.74 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.85 µg/m³
  • PM10: 14.22 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.68 µg/m³
  • PM10: 13.96 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.45 µg/m³
  • PM10: 13.8 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.19 µg/m³
  • PM10: 13.71 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.05 µg/m³
  • PM10: 13.58 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.02 µg/m³
  • PM10: 13.6 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.02 µg/m³
  • PM10: 13.75 µg/m³
  • O3: 0.030 ppm
  • NO2: 2.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.03 µg/m³
  • PM10: 13.84 µg/m³
  • O3: 0.027 ppm
  • NO2: 3.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.12 µg/m³
  • PM10: 14.14 µg/m³
  • O3: 0.025 ppm
  • NO2: 3.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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