Hourly Weather | Today Thursday, December 4, 2025
Ann Arbor, Michigan
6 AM
Cloudy Weather
21°
Feels Like
22
Humidity: 71%
Wind: 17 mph
UV Index: 0
7 AM
Cloudy Night
14°
Feels Like
0
Humidity: 82%
Wind: 9 mph
UV Index: 0
8 AM
Cloudy Weather
14°
Feels Like
0
Humidity: 84%
Wind: 10 mph
UV Index: 0
9 AM
Cloudy Weather
16°
Feels Like
0
Humidity: 81%
Wind: 12 mph
UV Index: 1
10 AM
Cloudy Weather
16°
Feels Like
0
Humidity: 75%
Wind: 12 mph
UV Index: 2
11 AM
Cloudy Weather
18°
Feels Like
0
Humidity: 70%
Wind: 12 mph
UV Index: 1
12 PM
Cloudy Weather
19°
Feels Like
0
Humidity: 67%
Wind: 12 mph
UV Index: 1
1 PM
Cloudy Weather
19°
Feels Like
0
Humidity: 67%
Wind: 10 mph
UV Index: 1
2 PM
Cloudy Weather
19°
Feels Like 12°
0
Humidity: 63%
Wind: 9 mph
UV Index: 1
3 PM
Cloudy Weather
19°
Feels Like 14°
0
Humidity: 66%
Wind: 7 mph
UV Index: 1
4 PM
Cloudy Weather
18°
Feels Like 14°
0
Humidity: 71%
Wind: 6 mph
UV Index: 0
5 PM
Cloudy Weather
16°
Feels Like 14°
0
Humidity: 77%
Wind: 5 mph
UV Index: 0
6 PM
Cloudy Night
14°
Feels Like 16°
0
Humidity: 77%
Wind: 4 mph
UV Index: 0
7 PM
Cloudy Night
12°
Feels Like 16°
0
Humidity: 77%
Wind: 2 mph
UV Index: 0
8 PM
Cloudy Night
Feels Like 10°
0
Humidity: 85%
Wind: 4 mph
UV Index: 0
9 PM
Cloudy Night
Feels Like
0
Humidity: 91%
Wind: 6 mph
UV Index: 0
10 PM
Cloudy Night
Feels Like
0
Humidity: 100%
Wind: 6 mph
UV Index: 0
11 PM
Cloudy Night
Feels Like
0
Humidity: 89%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.14 µg/m³
  • PM10: 1.32 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.77 µg/m³
  • PM10: 0.92 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.64 µg/m³
  • PM10: 0.78 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.58 µg/m³
  • PM10: 0.74 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.56 µg/m³
  • PM10: 0.72 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.55 µg/m³
  • PM10: 0.7 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.57 µg/m³
  • PM10: 0.77 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 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: 0.69 µg/m³
  • PM10: 0.9 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1 µg/m³
  • PM10: 1.24 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.46 µg/m³
  • PM10: 1.77 µg/m³
  • O3: 0.041 ppm
  • NO2: 2.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.85 µg/m³
  • PM10: 2.22 µg/m³
  • O3: 0.039 ppm
  • NO2: 3.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.37 µg/m³
  • PM10: 2.88 µg/m³
  • O3: 0.036 ppm
  • NO2: 6.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.11 µg/m³
  • PM10: 3.83 µg/m³
  • O3: 0.031 ppm
  • NO2: 9.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.94 µg/m³
  • PM10: 4.87 µg/m³
  • O3: 0.028 ppm
  • NO2: 11.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.72 µg/m³
  • PM10: 5.83 µg/m³
  • O3: 0.026 ppm
  • NO2: 12.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.46 µg/m³
  • PM10: 6.69 µg/m³
  • O3: 0.025 ppm
  • NO2: 12.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.23 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.19 µg/m³
  • PM10: 7.46 µg/m³
  • O3: 0.024 ppm
  • NO2: 11.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.8 µg/m³
  • PM10: 7.92 µg/m³
  • O3: 0.023 ppm
  • NO2: 11.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.24 ppm

Health Recommendations:

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