Hourly Weather | Today Thursday, April 9, 2026
West Allis, Wisconsin
7 AM
Rainy Weather
46°
Feels Like 37°
44
Humidity: 84%
UV Index: 0
Wind: 14 mph
8 AM
Cloudy Weather
48°
Feels Like 45°
44
Humidity: 63%
UV Index: 1
Wind: 12 mph
9 AM
Cloudy Weather
52°
Feels Like 48°
48
Humidity: 55%
UV Index: 2
Wind: 12 mph
10 AM
Partly Sunny with Showers
54°
Feels Like 48°
52
Humidity: 47%
UV Index: 3
Wind: 12 mph
11 AM
Cloudy Weather
55°
Feels Like 55°
43
Humidity: 42%
UV Index: 5
Wind: 13 mph
12 PM
Partly Sunny with Showers
57°
Feels Like 57°
51
Humidity: 37%
UV Index: 6
Wind: 13 mph
1 PM
Cloudy Weather
61°
Feels Like 63°
47
Humidity: 35%
UV Index: 6
Wind: 13 mph
2 PM
Cloudy Weather
63°
Feels Like 61°
20
Humidity: 33%
UV Index: 6
Wind: 18 mph
3 PM
Cloudy Weather
63°
Feels Like 63°
20
Humidity: 32%
UV Index: 5
Wind: 17 mph
4 PM
Cloudy Weather
64°
Feels Like 63°
20
Humidity: 31%
UV Index: 3
Wind: 16 mph
5 PM
Cloudy Weather
63°
Feels Like 61°
20
Humidity: 35%
UV Index: 2
Wind: 15 mph
6 PM
Cloudy Weather
61°
Feels Like 57°
20
Humidity: 40%
UV Index: 1
Wind: 13 mph
7 PM
Cloudy Weather
57°
Feels Like 54°
25
Humidity: 48%
UV Index: 0
Wind: 10 mph
8 PM
Rainy Weather
55°
Feels Like 52°
80
Humidity: 69%
UV Index: 0
Wind: 5 mph
9 PM
Rainy Weather
52°
Feels Like 46°
80
Humidity: 77%
UV Index: 0
Wind: 6 mph
10 PM
Rainy Weather
50°
Feels Like 45°
80
Humidity: 81%
UV Index: 0
Wind: 6 mph
11 PM
Rainy Weather
48°
Feels Like 43°
60
Humidity: 80%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 5.73 µg/m³
  • PM10: 5.91 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.6 µg/m³
  • PM10: 5.88 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.31 µg/m³
  • PM10: 5.67 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.93 µg/m³
  • PM10: 5.36 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.58 µg/m³
  • PM10: 4.12 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3 µg/m³
  • PM10: 3.59 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.36 µg/m³
  • PM10: 2.95 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.75 µg/m³
  • PM10: 2.3 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.68 µg/m³
  • PM10: 2.23 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.99 µg/m³
  • PM10: 2.56 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.56 µg/m³
  • PM10: 3.18 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.33 µg/m³
  • PM10: 4.02 µg/m³
  • O3: 0.048 ppm
  • NO2: 2.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.18 µg/m³
  • PM10: 4.95 µg/m³
  • O3: 0.045 ppm
  • NO2: 3.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.96 µg/m³
  • PM10: 5.69 µg/m³
  • O3: 0.043 ppm
  • NO2: 4.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.64 µg/m³
  • PM10: 6.24 µg/m³
  • O3: 0.043 ppm
  • NO2: 3.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.2 µg/m³
  • PM10: 6.69 µg/m³
  • O3: 0.043 ppm
  • NO2: 3.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.99 µg/m³
  • PM10: 6.37 µg/m³
  • O3: 0.042 ppm
  • NO2: 3.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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