Hourly Weather | Today Tuesday, April 28, 2026
Flagstaff, Arizona
9 AM
Cloudy Weather
46°
Feels Like 54°
0
Humidity: 33%
UV Index: 5
Wind: 6 mph
10 AM
Cloudy Weather
52°
Feels Like 61°
0
Humidity: 24%
UV Index: 7
Wind: 7 mph
11 AM
Cloudy Weather
55°
Feels Like 64°
0
Humidity: 19%
UV Index: 10
Wind: 8 mph
12 PM
Cloudy Weather
59°
Feels Like 66°
0
Humidity: 15%
UV Index: 11
Wind: 9 mph
1 PM
Cloudy Weather
61°
Feels Like 66°
0
Humidity: 14%
UV Index: 10
Wind: 10 mph
2 PM
Cloudy Weather
63°
Feels Like 66°
0
Humidity: 13%
UV Index: 7
Wind: 12 mph
3 PM
Cloudy Weather
64°
Feels Like 66°
0
Humidity: 12%
UV Index: 5
Wind: 13 mph
4 PM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 13%
UV Index: 3
Wind: 13 mph
5 PM
Cloudy Weather
61°
Feels Like 59°
0
Humidity: 15%
UV Index: 2
Wind: 13 mph
6 PM
Cloudy Weather
59°
Feels Like 55°
0
Humidity: 17%
UV Index: 1
Wind: 12 mph
7 PM
Sunny Weather
57°
Feels Like 54°
0
Humidity: 19%
UV Index: 0
Wind: 9 mph
8 PM
Cloudy Night
54°
Feels Like 48°
0
Humidity: 24%
UV Index: 0
Wind: 8 mph
9 PM
Cloudy Night
50°
Feels Like 46°
0
Humidity: 28%
UV Index: 0
Wind: 8 mph
10 PM
Cloudy Night
46°
Feels Like 43°
0
Humidity: 31%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
45°
Feels Like 39°
0
Humidity: 35%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.9 µg/m³
  • PM10: 15.88 µg/m³
  • O3: 0.029 ppm
  • NO2: 3.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.91 µg/m³
  • PM10: 17.41 µg/m³
  • O3: 0.037 ppm
  • NO2: 3 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.27 µg/m³
  • PM10: 18.41 µg/m³
  • O3: 0.044 ppm
  • NO2: 2.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.46 µg/m³
  • PM10: 20.44 µg/m³
  • O3: 0.053 ppm
  • NO2: 2 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

1 PM
88 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.17 µg/m³
  • PM10: 18.66 µg/m³
  • O3: 0.066 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

2 PM
94 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.93 µg/m³
  • PM10: 16.19 µg/m³
  • O3: 0.068 ppm
  • NO2: 0.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

3 PM
97 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.17 µg/m³
  • PM10: 15.82 µg/m³
  • O3: 0.069 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

4 PM
101 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.36 µg/m³
  • PM10: 15.81 µg/m³
  • O3: 0.070 ppm
  • NO2: 0.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

5 PM
99 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.28 µg/m³
  • PM10: 15.49 µg/m³
  • O3: 0.070 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

6 PM
95 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.06 µg/m³
  • PM10: 15.17 µg/m³
  • O3: 0.068 ppm
  • NO2: 0.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

7 PM
86 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.95 µg/m³
  • PM10: 15.19 µg/m³
  • O3: 0.065 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

8 PM
70 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.96 µg/m³
  • PM10: 15.63 µg/m³
  • O3: 0.060 ppm
  • NO2: 2.4 ppb
  • SO2: 0.2 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.

9 PM
57 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.96 µg/m³
  • PM10: 16.36 µg/m³
  • O3: 0.056 ppm
  • NO2: 2.8 ppb
  • SO2: 0.2 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.

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

Pollutant Concentrations:

  • PM2.5: 5.05 µg/m³
  • PM10: 17.14 µg/m³
  • O3: 0.052 ppm
  • NO2: 3.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.27 µg/m³
  • PM10: 18.01 µg/m³
  • O3: 0.049 ppm
  • NO2: 3.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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