Hourly Weather | Today Tuesday, September 1, 2026
Madison, Wisconsin
11 AM
Foggy Weather
82°
Feels Like 90°
40
Humidity: 71%
UV Index: 2
Wind: 6 mph
12 PM
Foggy Weather
84°
Feels Like 91°
34
Humidity: 64%
UV Index: 3
Wind: 6 mph
1 PM
Foggy Weather
88°
Feels Like 97°
40
Humidity: 58%
UV Index: 3
Wind: 6 mph
2 PM
Partly Sunny with Showers
88°
Feels Like 91°
51
Humidity: 62%
UV Index: 2
Wind: 7 mph
3 PM
Cloudy Weather
90°
Feels Like 97°
47
Humidity: 54%
UV Index: 3
Wind: 7 mph
4 PM
Cloudy Weather
90°
Feels Like 95°
40
Humidity: 56%
UV Index: 2
Wind: 8 mph
5 PM
Cloudy Weather
88°
Feels Like 93°
34
Humidity: 58%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Weather
88°
Feels Like 93°
34
Humidity: 62%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Weather
84°
Feels Like 91°
37
Humidity: 67%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
82°
Feels Like 90°
43
Humidity: 73%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
81°
Feels Like 88°
47
Humidity: 78%
UV Index: 0
Wind: 5 mph
10 PM
Stormy Weather
79°
Feels Like 82°
51
Humidity: 84%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
75°
Feels Like 82°
49
Humidity: 88%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 9.56 µg/m³
  • PM10: 10.16 µg/m³
  • O3: 0.027 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 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: 10.1 µg/m³
  • PM10: 10.67 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.79 µg/m³
  • PM10: 11.36 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.5 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
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.22 µg/m³
  • PM10: 9.66 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.88 µg/m³
  • PM10: 9.31 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 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: 9.62 µg/m³
  • PM10: 10.09 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.29 µg/m³
  • PM10: 10.81 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.55 µg/m³
  • PM10: 11.11 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.18 µg/m³
  • PM10: 10.77 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.35 µg/m³
  • PM10: 9.95 µg/m³
  • O3: 0.040 ppm
  • NO2: 2 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.46 µg/m³
  • PM10: 9.06 µg/m³
  • O3: 0.037 ppm
  • NO2: 2.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.63 µg/m³
  • PM10: 8.22 µg/m³
  • O3: 0.034 ppm
  • NO2: 2.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.89 µg/m³
  • PM10: 7.46 µg/m³
  • O3: 0.031 ppm
  • NO2: 2.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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