Hourly Weather | Today Saturday, September 19, 2026
Ann Arbor, Michigan
6 AM
Cloudy Weather
55°
Feels Like 55°
49
Humidity: 81%
UV Index: 0
Wind: 5 mph
7 AM
Rainy Weather
55°
Feels Like 54°
79
Humidity: 84%
UV Index: 0
Wind: 5 mph
8 AM
Cloudy Weather
54°
Feels Like 54°
49
Humidity: 94%
UV Index: 0
Wind: 6 mph
9 AM
Cloudy Weather
55°
Feels Like 55°
47
Humidity: 97%
UV Index: 1
Wind: 6 mph
10 AM
Rainy Weather
57°
Feels Like 54°
51
Humidity: 98%
UV Index: 1
Wind: 6 mph
11 AM
Cloudy Weather
59°
Feels Like 59°
47
Humidity: 98%
UV Index: 1
Wind: 7 mph
12 PM
Cloudy Weather
61°
Feels Like 61°
47
Humidity: 98%
UV Index: 1
Wind: 7 mph
1 PM
Rainy Weather
61°
Feels Like 57°
51
Humidity: 97%
UV Index: 1
Wind: 8 mph
2 PM
Rainy Weather
63°
Feels Like 57°
81
Humidity: 96%
UV Index: 1
Wind: 9 mph
3 PM
Rainy Weather
63°
Feels Like 57°
81
Humidity: 96%
UV Index: 1
Wind: 9 mph
4 PM
Rainy Weather
63°
Feels Like 59°
81
Humidity: 93%
UV Index: 1
Wind: 9 mph
5 PM
Rainy Weather
63°
Feels Like 57°
61
Humidity: 96%
UV Index: 0
Wind: 9 mph
6 PM
Cloudy Weather
63°
Feels Like 61°
49
Humidity: 97%
UV Index: 0
Wind: 8 mph
7 PM
Cloudy Weather
63°
Feels Like 61°
49
Humidity: 98%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Weather
61°
Feels Like 59°
49
Humidity: 99%
UV Index: 0
Wind: 8 mph
9 PM
Stormy Weather
61°
Feels Like 55°
67
Humidity: 100%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Weather
61°
Feels Like 59°
49
Humidity: 100%
UV Index: 0
Wind: 7 mph
11 PM
Stormy Weather
61°
Feels Like 55°
82
Humidity: 100%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.34 µg/m³
  • PM10: 5.22 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

7 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.34 µg/m³
  • PM10: 5.23 µg/m³
  • O3: 0.024 ppm
  • NO2: 3 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

8 AM
21 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.48 µg/m³
  • PM10: 5.45 µg/m³
  • O3: 0.023 ppm
  • NO2: 3.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.76 µg/m³
  • PM10: 5.77 µg/m³
  • O3: 0.024 ppm
  • NO2: 3.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.02 µg/m³
  • PM10: 5.97 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.27 µg/m³
  • PM10: 6.14 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.8 µg/m³
  • PM10: 6.59 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.5 µg/m³
  • PM10: 7.25 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.56 µg/m³
  • PM10: 8.29 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.82 µg/m³
  • PM10: 9.52 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.4 µg/m³
  • PM10: 10.03 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.5 µg/m³
  • PM10: 10.06 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

6 PM
40 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.53 µg/m³
  • PM10: 10.02 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

7 PM
41 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.74 µg/m³
  • PM10: 10.24 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

8 PM
41 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.95 µg/m³
  • PM10: 10.46 µg/m³
  • O3: 0.029 ppm
  • NO2: 2.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

9 PM
41 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.9 µg/m³
  • PM10: 10.37 µg/m³
  • O3: 0.027 ppm
  • NO2: 2.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

10 PM
41 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.8 µg/m³
  • PM10: 10.24 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

11 PM
40 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.65 µg/m³
  • PM10: 10.09 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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