Hourly Weather | Today Wednesday, March 18, 2026
West Allis, Wisconsin
4 PM
Cloudy Weather
34°
Feels Like 27°
0
Humidity: 80%
UV Index: 1
Wind: 10 mph
5 PM
Cloudy Weather
34°
Feels Like 28°
0
Humidity: 80%
UV Index: 1
Wind: 9 mph
6 PM
Cloudy Weather
36°
Feels Like 28°
0
Humidity: 80%
UV Index: 0
Wind: 8 mph
7 PM
Cloudy Weather
36°
Feels Like 28°
1
Humidity: 81%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Night
36°
Feels Like 32°
7
Humidity: 83%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
36°
Feels Like 32°
7
Humidity: 84%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
36°
Feels Like 32°
6
Humidity: 84%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
36°
Feels Like 32°
4
Humidity: 85%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 18.01 µg/m³
  • PM10: 18.82 µg/m³
  • O3: 0.063 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

5 PM
72 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 19.42 µg/m³
  • PM10: 20.31 µg/m³
  • O3: 0.061 ppm
  • NO2: 2.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

6 PM
68 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 20.36 µg/m³
  • PM10: 21.36 µg/m³
  • O3: 0.056 ppm
  • NO2: 4.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

7 PM
69 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 20.86 µg/m³
  • PM10: 21.98 µg/m³
  • O3: 0.050 ppm
  • NO2: 7 ppb
  • SO2: 0.3 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

8 PM
70 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 21.3 µg/m³
  • PM10: 22.57 µg/m³
  • O3: 0.045 ppm
  • NO2: 8.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

9 PM
72 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 22.15 µg/m³
  • PM10: 23.61 µg/m³
  • O3: 0.041 ppm
  • NO2: 9 ppb
  • SO2: 0.3 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

10 PM
74 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 23.18 µg/m³
  • PM10: 24.8 µg/m³
  • O3: 0.037 ppm
  • NO2: 9.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

11 PM
76 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 24.16 µg/m³
  • PM10: 25.92 µg/m³
  • O3: 0.034 ppm
  • NO2: 9.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.24 ppm

Health Recommendations:

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