Hourly Weather | Today Wednesday, March 18, 2026
Ann Arbor, Michigan
10 AM
Cloudy Weather
23°
Feels Like 14°
7
Humidity: 56%
UV Index: 2
Wind: 10 mph
11 AM
Cloudy Weather
27°
Feels Like 16°
7
Humidity: 53%
UV Index: 2
Wind: 12 mph
12 PM
Cloudy Weather
28°
Feels Like 18°
7
Humidity: 51%
UV Index: 2
Wind: 14 mph
1 PM
Cloudy Weather
30°
Feels Like 18°
10
Humidity: 52%
UV Index: 2
Wind: 14 mph
2 PM
Snowy Weather
30°
Feels Like 18°
45
Humidity: 54%
UV Index: 1
Wind: 15 mph
3 PM
Snowy Weather
32°
Feels Like 19°
47
Humidity: 56%
UV Index: 1
Wind: 15 mph
4 PM
Cloudy Weather
34°
Feels Like 21°
43
Humidity: 59%
UV Index: 1
Wind: 15 mph
5 PM
Cloudy Weather
34°
Feels Like 21°
19
Humidity: 64%
UV Index: 0
Wind: 14 mph
6 PM
Cloudy Weather
36°
Feels Like 25°
19
Humidity: 66%
UV Index: 0
Wind: 13 mph
7 PM
Cloudy Weather
34°
Feels Like 25°
17
Humidity: 75%
UV Index: 0
Wind: 10 mph
8 PM
Cloudy Weather
34°
Feels Like 25°
14
Humidity: 80%
UV Index: 0
Wind: 9 mph
9 PM
Cloudy Weather
32°
Feels Like 25°
14
Humidity: 84%
UV Index: 0
Wind: 8 mph
10 PM
Cloudy Weather
30°
Feels Like 25°
14
Humidity: 87%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Weather
30°
Feels Like 27°
14
Humidity: 88%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.42 µg/m³
  • PM10: 4.76 µg/m³
  • O3: 0.044 ppm
  • NO2: 3.4 ppb
  • SO2: 1.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.57 µg/m³
  • PM10: 4.85 µg/m³
  • O3: 0.044 ppm
  • NO2: 3.7 ppb
  • SO2: 1.5 ppb
  • CO: 0.16 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.56 µg/m³
  • PM10: 4.73 µg/m³
  • O3: 0.046 ppm
  • NO2: 3.5 ppb
  • SO2: 1.7 ppb
  • CO: 0.16 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.64 µg/m³
  • PM10: 4.67 µg/m³
  • O3: 0.047 ppm
  • NO2: 3.3 ppb
  • SO2: 1.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.91 µg/m³
  • PM10: 4.84 µg/m³
  • O3: 0.048 ppm
  • NO2: 3.2 ppb
  • SO2: 1.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.45 µg/m³
  • PM10: 5.43 µg/m³
  • O3: 0.049 ppm
  • NO2: 3.1 ppb
  • SO2: 1.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.92 µg/m³
  • PM10: 6.03 µg/m³
  • O3: 0.050 ppm
  • NO2: 3.1 ppb
  • SO2: 1.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.24 µg/m³
  • PM10: 6.5 µg/m³
  • O3: 0.050 ppm
  • NO2: 3.2 ppb
  • SO2: 1.5 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.45 µg/m³
  • PM10: 6.84 µg/m³
  • O3: 0.051 ppm
  • NO2: 3.4 ppb
  • SO2: 1.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.49 µg/m³
  • PM10: 7.03 µg/m³
  • O3: 0.049 ppm
  • NO2: 4.1 ppb
  • SO2: 1.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.51 µg/m³
  • PM10: 7.23 µg/m³
  • O3: 0.048 ppm
  • NO2: 4.3 ppb
  • SO2: 1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.61 µg/m³
  • PM10: 7.48 µg/m³
  • O3: 0.048 ppm
  • NO2: 4.1 ppb
  • SO2: 0.8 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.89 µg/m³
  • PM10: 7.91 µg/m³
  • O3: 0.047 ppm
  • NO2: 4 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.36 µg/m³
  • PM10: 8.52 µg/m³
  • O3: 0.045 ppm
  • NO2: 3.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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