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Today Hourly 7 days 30 days Air Quality
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Hourly Weather | Today › Wednesday, August 12, 2026
Active Weather Warnings
Flagstaff, Arizona
5 AM
Cloudy Weather
55°
Feels Like 55°
20
Humidity: 90%
UV Index: 0
Wind: 4 mph
6 AM
Cloudy Weather
57°
Feels Like 57°
16
Humidity: 85%
UV Index: 0
Wind: 5 mph
7 AM
Cloudy Weather
61°
Feels Like 63°
7
Humidity: 75%
UV Index: 2
Wind: 6 mph
8 AM
Cloudy Weather
64°
Feels Like 66°
7
Humidity: 72%
UV Index: 3
Wind: 7 mph
9 AM
Cloudy Weather
68°
Feels Like 72°
6
Humidity: 63%
UV Index: 5
Wind: 7 mph
10 AM
Cloudy Weather
72°
Feels Like 75°
5
Humidity: 56%
UV Index: 6
Wind: 8 mph
11 AM
Cloudy Weather
73°
Feels Like 81°
5
Humidity: 51%
UV Index: 9
Wind: 8 mph
12 PM
Cloudy Weather
73°
Feels Like 81°
8
Humidity: 49%
UV Index: 9
Wind: 9 mph
1 PM
Cloudy Weather
73°
Feels Like 79°
47
Humidity: 47%
UV Index: 7
Wind: 10 mph
2 PM
Sunny with a Chance of Thunderstorms
72°
Feels Like 70°
51
Humidity: 54%
UV Index: 3
Wind: 12 mph
3 PM
Cloudy Weather
72°
Feels Like 72°
47
Humidity: 56%
UV Index: 3
Wind: 12 mph
4 PM
Cloudy Weather
70°
Feels Like 70°
15
Humidity: 59%
UV Index: 2
Wind: 12 mph
5 PM
Cloudy Weather
70°
Feels Like 66°
15
Humidity: 60%
UV Index: 1
Wind: 12 mph
6 PM
Cloudy Weather
66°
Feels Like 64°
19
Humidity: 64%
UV Index: 1
Wind: 10 mph
7 PM
Stormy Weather
64°
Feels Like 59°
51
Humidity: 71%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Weather
64°
Feels Like 63°
47
Humidity: 76%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
63°
Feels Like 61°
40
Humidity: 79%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Weather
61°
Feels Like 59°
33
Humidity: 82%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
61°
Feels Like 57°
33
Humidity: 83%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 5.06 µg/m³
  • PM10: 13.78 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

6 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.27 µg/m³
  • PM10: 14.73 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

7 AM
23 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.43 µg/m³
  • PM10: 15.65 µg/m³
  • O3: 0.024 ppm
  • NO2: 2.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

8 AM
24 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.67 µg/m³
  • PM10: 17.13 µg/m³
  • O3: 0.023 ppm
  • NO2: 3.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

9 AM
25 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.1 µg/m³
  • PM10: 20.05 µg/m³
  • O3: 0.023 ppm
  • NO2: 3.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

10 AM
28 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.79 µg/m³
  • PM10: 26.42 µg/m³
  • O3: 0.031 ppm
  • NO2: 2.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.44 µg/m³
  • PM10: 25.14 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.34 µg/m³
  • PM10: 23.86 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.45 µg/m³
  • PM10: 22.9 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.

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

Pollutant Concentrations:

  • PM2.5: 6.3 µg/m³
  • PM10: 20.64 µg/m³
  • O3: 0.043 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.

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

Pollutant Concentrations:

  • PM2.5: 6.01 µg/m³
  • PM10: 18.51 µg/m³
  • O3: 0.043 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
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.64 µg/m³
  • PM10: 16.64 µg/m³
  • O3: 0.043 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
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.2 µg/m³
  • PM10: 14.95 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.5 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.76 µg/m³
  • PM10: 13.51 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.6 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.47 µg/m³
  • PM10: 12.31 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.41 µg/m³
  • PM10: 11.63 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 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: 4.42 µg/m³
  • PM10: 11.26 µg/m³
  • O3: 0.030 ppm
  • NO2: 3.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.26 µg/m³
  • PM10: 10.49 µg/m³
  • O3: 0.028 ppm
  • NO2: 3.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.16 µg/m³
  • PM10: 10.08 µg/m³
  • O3: 0.028 ppm
  • NO2: 3.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Flagstaff

Severe Future Possible

Flood Watch

Flood Watch issued August 12 at 1:11AM MST until August 13 at 12:00AM MST by NWS Flagstaff AZ
Aug 12, 1:00 PM → Aug 13, 1:00 AM
WHAT: Elevated potential for Flash Flooding due to excessive
rainfall.

WHERE: Yavapai County, Coconino County, Navajo County, Apache
County and northern Gila County.

WHEN: From Noon MST Wednesday through Midnight MST Wednesday
evening.

IMPACTS: Flash flooding will be possible in creeks, normally dry
washes, swimming holes, and over recently burned areas. Raging
killer currents will be possible in side canyons and narrow slot
canyons. Low-water crossings may be flooded.

ADDITIONAL DETAILS:
- High moisture values and increased instability will lead to
strong thunderstorms today and this evening.
- Additional information is available at weather.gov/flagstaff.
+ Read More
Have a way to receive Flash Flood Warnings and be prepared to take action should warnings be issued. Consider changing your plans if you were going to hike, boat, or paddleboard to a slot canyon or normally dry wash. If you do still decide to recreate, check in at a nearby visitor center or ranger station.
Updated: Aug 12, 5:02 AM Source: NWS Alert

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