Hourly Weather | Today Wednesday, March 18, 2026
Green Bay, Wisconsin
5 AM
Cloudy Weather
16°
Feels Like
47
Frost Risk: 100%
Humidity: 100%
UV Index: 0
Wind: 10 mph
6 AM
Cloudy Weather
18°
Feels Like
43
Frost Risk: 100%
Humidity: 99%
UV Index: 0
Wind: 10 mph
7 AM
Snowy Weather
18°
Feels Like
47
Frost Risk: 100%
Humidity: 97%
UV Index: 0
Wind: 9 mph
8 AM
Cloudy Weather
19°
Feels Like
40
Frost Risk: 100%
Humidity: 89%
UV Index: 0
Wind: 12 mph
9 AM
Snowy Weather
21°
Feels Like
43
Frost Risk: 99%
Humidity: 92%
UV Index: 0
Wind: 13 mph
10 AM
Snowy Weather
25°
Feels Like 10°
43
Humidity: 90%
UV Index: 1
Wind: 13 mph
11 AM
Cloudy Weather
27°
Feels Like 14°
37
Humidity: 87%
UV Index: 1
Wind: 13 mph
12 PM
Cloudy Weather
28°
Feels Like 18°
32
Humidity: 85%
UV Index: 1
Wind: 13 mph
1 PM
Cloudy Weather
30°
Feels Like 19°
28
Humidity: 83%
UV Index: 1
Wind: 13 mph
2 PM
Cloudy Weather
30°
Feels Like 21°
20
Humidity: 82%
UV Index: 1
Wind: 13 mph
3 PM
Cloudy Weather
34°
Feels Like 23°
20
Humidity: 82%
UV Index: 1
Wind: 12 mph
4 PM
Cloudy Weather
34°
Feels Like 25°
20
Humidity: 82%
UV Index: 1
Wind: 12 mph
5 PM
Cloudy Weather
34°
Feels Like 27°
20
Humidity: 80%
UV Index: 1
Wind: 10 mph
6 PM
Cloudy Weather
34°
Feels Like 27°
20
Humidity: 85%
UV Index: 0
Wind: 9 mph
7 PM
Cloudy Weather
34°
Feels Like 27°
25
Humidity: 87%
UV Index: 0
Wind: 8 mph
8 PM
Snowy Weather
34°
Feels Like 25°
51
Humidity: 88%
UV Index: 0
Wind: 8 mph
9 PM
Cloudy Weather
34°
Feels Like 27°
47
Humidity: 88%
UV Index: 0
Wind: 8 mph
10 PM
Cloudy Weather
34°
Feels Like 28°
36
Humidity: 89%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Weather
34°
Feels Like 28°
22
Humidity: 90%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.57 µg/m³
  • PM10: 4.65 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.34 µg/m³
  • PM10: 4.41 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.15 µg/m³
  • PM10: 4.22 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.12 µg/m³
  • PM10: 4.21 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.18 µg/m³
  • PM10: 4.31 µg/m³
  • O3: 0.050 ppm
  • NO2: 2 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.39 µg/m³
  • PM10: 4.58 µg/m³
  • O3: 0.050 ppm
  • NO2: 2.2 ppb
  • SO2: 0.4 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: 4.99 µg/m³
  • PM10: 5.26 µg/m³
  • O3: 0.050 ppm
  • NO2: 2.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 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: 6.09 µg/m³
  • PM10: 6.46 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 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: 8.06 µg/m³
  • PM10: 8.5 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.6 ppb
  • SO2: 0.9 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

2 PM
54 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.26 µg/m³
  • PM10: 11.77 µg/m³
  • O3: 0.055 ppm
  • NO2: 1.3 ppb
  • SO2: 1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

3 PM
64 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 14.16 µg/m³
  • PM10: 14.71 µg/m³
  • O3: 0.059 ppm
  • NO2: 1.2 ppb
  • SO2: 0.9 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.87 µg/m³
  • PM10: 16.46 µg/m³
  • O3: 0.061 ppm
  • NO2: 1.2 ppb
  • SO2: 0.8 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.13 µg/m³
  • PM10: 17.76 µg/m³
  • O3: 0.062 ppm
  • NO2: 1.5 ppb
  • SO2: 0.7 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.

6 PM
75 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 18.25 µg/m³
  • PM10: 18.95 µg/m³
  • O3: 0.062 ppm
  • NO2: 2.3 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.

7 PM
71 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 19.11 µg/m³
  • PM10: 19.86 µg/m³
  • O3: 0.061 ppm
  • NO2: 3.2 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.

8 PM
68 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 19.77 µg/m³
  • PM10: 20.57 µg/m³
  • O3: 0.060 ppm
  • NO2: 3.5 ppb
  • SO2: 0.4 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.

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

Pollutant Concentrations:

  • PM2.5: 20.49 µg/m³
  • PM10: 21.34 µg/m³
  • O3: 0.059 ppm
  • NO2: 3.3 ppb
  • SO2: 0.4 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.

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

Pollutant Concentrations:

  • PM2.5: 21.17 µg/m³
  • PM10: 22.05 µg/m³
  • O3: 0.059 ppm
  • NO2: 3.1 ppb
  • SO2: 0.4 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.

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

Pollutant Concentrations:

  • PM2.5: 21.47 µg/m³
  • PM10: 22.26 µg/m³
  • O3: 0.058 ppm
  • NO2: 2.7 ppb
  • SO2: 0.4 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.