Hourly Weather | Today Tuesday, September 1, 2026
Waukesha, Wisconsin
11 AM
Rainy Weather
86°
Feels Like 91°
51
Humidity: 67%
UV Index: 2
Wind: 7 mph
12 PM
Cloudy Weather
88°
Feels Like 97°
47
Humidity: 64%
UV Index: 5
Wind: 8 mph
1 PM
Cloudy Weather
88°
Feels Like 99°
40
Humidity: 61%
UV Index: 6
Wind: 8 mph
2 PM
Cloudy Weather
88°
Feels Like 99°
34
Humidity: 60%
UV Index: 6
Wind: 8 mph
3 PM
Cloudy Weather
90°
Feels Like 99°
34
Humidity: 58%
UV Index: 5
Wind: 8 mph
4 PM
Cloudy Weather
88°
Feels Like 97°
37
Humidity: 60%
UV Index: 3
Wind: 8 mph
5 PM
Cloudy Weather
88°
Feels Like 93°
45
Humidity: 64%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
84°
Feels Like 93°
49
Humidity: 69%
UV Index: 1
Wind: 7 mph
7 PM
Partly Sunny with Showers
82°
Feels Like 88°
53
Humidity: 79%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
81°
Feels Like 86°
49
Humidity: 81%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
77°
Feels Like 84°
48
Humidity: 88%
UV Index: 0
Wind: 5 mph
10 PM
Stormy Weather
75°
Feels Like 81°
52
Humidity: 91%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
75°
Feels Like 82°
49
Humidity: 91%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 11.56 µg/m³
  • PM10: 12.26 µg/m³
  • O3: 0.025 ppm
  • NO2: 1.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

12 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.53 µg/m³
  • PM10: 13.21 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

1 PM
53 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.45 µg/m³
  • PM10: 14.11 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.5 µg/m³
  • PM10: 9.92 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.35 µg/m³
  • PM10: 6.62 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.94 µg/m³
  • PM10: 5.17 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.57 µg/m³
  • PM10: 4.82 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.05 µg/m³
  • PM10: 5.37 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.95 µg/m³
  • PM10: 6.35 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.84 µg/m³
  • PM10: 7.31 µg/m³
  • O3: 0.041 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.

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

Pollutant Concentrations:

  • PM2.5: 7.55 µg/m³
  • PM10: 8.09 µg/m³
  • O3: 0.038 ppm
  • NO2: 2.2 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
33 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.96 µg/m³
  • PM10: 8.54 µg/m³
  • O3: 0.036 ppm
  • NO2: 2.2 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
33 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.99 µg/m³
  • PM10: 8.59 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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