Hourly Weather | Today Thursday, May 21, 2026
Ann Arbor, Michigan
12 PM
Cloudy Weather
55°
Feels Like 61°
0
Humidity: 46%
UV Index: 9
Wind: 12 mph
1 PM
Cloudy Weather
57°
Feels Like 63°
0
Humidity: 44%
UV Index: 7
Wind: 12 mph
2 PM
Cloudy Weather
63°
Feels Like 64°
0
Humidity: 40%
UV Index: 6
Wind: 13 mph
3 PM
Cloudy Weather
63°
Feels Like 64°
0
Humidity: 39%
UV Index: 5
Wind: 12 mph
4 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 39%
UV Index: 4
Wind: 12 mph
5 PM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 42%
UV Index: 3
Wind: 12 mph
6 PM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 43%
UV Index: 2
Wind: 10 mph
7 PM
Cloudy Weather
61°
Feels Like 59°
0
Humidity: 46%
UV Index: 1
Wind: 10 mph
8 PM
Cloudy Weather
61°
Feels Like 55°
0
Humidity: 50%
UV Index: 0
Wind: 10 mph
9 PM
Cloudy Night
57°
Feels Like 54°
0
Humidity: 56%
UV Index: 0
Wind: 9 mph
10 PM
Cloudy Night
54°
Feels Like 50°
0
Humidity: 58%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Night
52°
Feels Like 46°
0
Humidity: 61%
UV Index: 0
Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.16 µg/m³
  • PM10: 3.71 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.4 ppb
  • SO2: 1.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.45 µg/m³
  • PM10: 4.99 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.9 ppb
  • SO2: 1.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.33 µg/m³
  • PM10: 5.88 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.6 ppb
  • SO2: 1.2 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.

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

Pollutant Concentrations:

  • PM2.5: 4.41 µg/m³
  • PM10: 4.91 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.4 ppb
  • SO2: 1 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.

4 PM
59 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.78 µg/m³
  • PM10: 4.22 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.4 ppb
  • SO2: 0.9 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.

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

Pollutant Concentrations:

  • PM2.5: 3.71 µg/m³
  • PM10: 4.14 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.4 ppb
  • SO2: 0.8 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.

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

Pollutant Concentrations:

  • PM2.5: 4.1 µg/m³
  • PM10: 4.56 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.6 ppb
  • SO2: 0.8 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.

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

Pollutant Concentrations:

  • PM2.5: 4.91 µg/m³
  • PM10: 5.42 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.8 ppb
  • SO2: 0.9 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.14 µg/m³
  • PM10: 5.69 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.1 ppb
  • SO2: 0.9 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.66 µg/m³
  • PM10: 5.23 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.4 ppb
  • SO2: 0.9 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.26 µg/m³
  • PM10: 4.86 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.5 ppb
  • SO2: 1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.23 µg/m³
  • PM10: 4.87 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.7 ppb
  • SO2: 1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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