Hourly Weather | Today Tuesday, July 21, 2026
Ann Arbor, Michigan
5 AM
Cloudy Weather
70°
Feels Like 70°
22
Humidity: 93%
UV Index: 0
Wind: 7 mph
6 AM
Cloudy Weather
68°
Feels Like 70°
17
Humidity: 97%
UV Index: 0
Wind: 8 mph
7 AM
Cloudy Weather
66°
Feels Like 68°
22
Humidity: 100%
UV Index: 0
Wind: 8 mph
8 AM
Stormy Weather
72°
Feels Like 68°
59
Humidity: 92%
UV Index: 0
Wind: 10 mph
9 AM
Stormy Weather
72°
Feels Like 72°
52
Humidity: 93%
UV Index: 1
Wind: 12 mph
10 AM
Cloudy Weather
75°
Feels Like 79°
49
Humidity: 86%
UV Index: 2
Wind: 13 mph
11 AM
Cloudy Weather
77°
Feels Like 82°
34
Humidity: 80%
UV Index: 3
Wind: 14 mph
12 PM
Cloudy Weather
81°
Feels Like 84°
34
Humidity: 72%
UV Index: 5
Wind: 15 mph
1 PM
Cloudy Weather
82°
Feels Like 86°
34
Humidity: 66%
UV Index: 5
Wind: 15 mph
2 PM
Cloudy Weather
84°
Feels Like 88°
34
Humidity: 60%
UV Index: 5
Wind: 14 mph
3 PM
Cloudy Weather
82°
Feels Like 84°
34
Humidity: 61%
UV Index: 3
Wind: 14 mph
4 PM
Cloudy Weather
82°
Feels Like 82°
40
Humidity: 61%
UV Index: 2
Wind: 14 mph
5 PM
Rainy Weather
81°
Feels Like 79°
51
Humidity: 62%
UV Index: 1
Wind: 13 mph
6 PM
Cloudy Weather
79°
Feels Like 79°
47
Humidity: 65%
UV Index: 1
Wind: 13 mph
7 PM
Cloudy Weather
75°
Feels Like 75°
36
Humidity: 71%
UV Index: 1
Wind: 12 mph
8 PM
Cloudy Weather
73°
Feels Like 72°
20
Humidity: 76%
UV Index: 0
Wind: 10 mph
9 PM
Cloudy Weather
72°
Feels Like 70°
20
Humidity: 79%
UV Index: 0
Wind: 10 mph
10 PM
Cloudy Night
68°
Feels Like 64°
20
Humidity: 79%
UV Index: 0
Wind: 10 mph
11 PM
Cloudy Night
64°
Feels Like 63°
20
Humidity: 80%
UV Index: 0
Wind: 10 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 14.27 µg/m³
  • PM10: 14.69 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.34 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.95 µg/m³
  • PM10: 14.32 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.77 µg/m³
  • PM10: 13.06 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.71 µg/m³
  • PM10: 11.88 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.19 µg/m³
  • PM10: 11.26 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.7 µg/m³
  • PM10: 10.77 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

11 AM
43 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.4 µg/m³
  • PM10: 10.48 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

12 PM
42 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.06 µg/m³
  • PM10: 10.13 µg/m³
  • O3: 0.031 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

1 PM
43 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.23 µg/m³
  • PM10: 10.32 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

2 PM
47 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.37 µg/m³
  • PM10: 11.47 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

3 PM
47 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.22 µg/m³
  • PM10: 11.34 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.15 µg/m³
  • PM10: 10.28 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.75 µg/m³
  • PM10: 8.89 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.64 µg/m³
  • PM10: 7.78 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.07 µg/m³
  • PM10: 7.22 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.52 µg/m³
  • PM10: 6.69 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.97 µg/m³
  • PM10: 6.15 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.54 µg/m³
  • PM10: 5.76 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.11 µg/m³
  • PM10: 5.35 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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