Hourly Weather | Today Wednesday, August 12, 2026
Active Weather Warnings
Appleton, Wisconsin
8 AM
Foggy Weather
72°
Feels Like 73°
20
Humidity: 90%
UV Index: 0
Wind: 5 mph
9 AM
Foggy Weather
73°
Feels Like 75°
20
Humidity: 87%
UV Index: 1
Wind: 5 mph
10 AM
Foggy Weather
75°
Feels Like 79°
20
Humidity: 83%
UV Index: 2
Wind: 5 mph
11 AM
Foggy Weather
75°
Feels Like 82°
20
Humidity: 79%
UV Index: 2
Wind: 5 mph
12 PM
Foggy Weather
79°
Feels Like 84°
20
Humidity: 74%
UV Index: 3
Wind: 5 mph
1 PM
Foggy Weather
81°
Feels Like 88°
25
Humidity: 70%
UV Index: 3
Wind: 5 mph
2 PM
Sunny with a Chance of Thunderstorms
81°
Feels Like 84°
51
Humidity: 68%
UV Index: 3
Wind: 5 mph
3 PM
Cloudy Weather
82°
Feels Like 90°
47
Humidity: 63%
UV Index: 2
Wind: 5 mph
4 PM
Cloudy Weather
84°
Feels Like 90°
35
Humidity: 58%
UV Index: 2
Wind: 5 mph
5 PM
Cloudy Weather
84°
Feels Like 88°
19
Humidity: 58%
UV Index: 1
Wind: 5 mph
6 PM
Cloudy Weather
82°
Feels Like 84°
19
Humidity: 58%
UV Index: 1
Wind: 5 mph
7 PM
Cloudy Weather
82°
Feels Like 82°
13
Humidity: 57%
UV Index: 0
Wind: 5 mph
8 PM
Cloudy Weather
79°
Feels Like 81°
0
Humidity: 64%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
77°
Feels Like 79°
0
Humidity: 69%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
75°
Feels Like 75°
0
Humidity: 73%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
73°
Feels Like 73°
0
Humidity: 80%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

8 AM
53 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.39 µg/m³
  • PM10: 13.72 µg/m³
  • O3: 0.007 ppm
  • NO2: 4 ppb
  • SO2: 0.1 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.

9 AM
50 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.01 µg/m³
  • PM10: 12.37 µg/m³
  • O3: 0.008 ppm
  • NO2: 4.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

10 AM
49 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.87 µg/m³
  • PM10: 12.25 µg/m³
  • O3: 0.011 ppm
  • NO2: 3.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.49 µg/m³
  • PM10: 11.84 µg/m³
  • O3: 0.021 ppm
  • NO2: 2.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

12 PM
43 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.41 µg/m³
  • PM10: 10.74 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.56 µg/m³
  • PM10: 9.89 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.58 µg/m³
  • PM10: 8.89 µg/m³
  • O3: 0.031 ppm
  • NO2: 2.2 ppb
  • SO2: 0.8 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

3 PM
34 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.04 µg/m³
  • PM10: 8.32 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

4 PM
36 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.52 µg/m³
  • PM10: 8.8 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.4 ppb
  • SO2: 0.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.53 µg/m³
  • PM10: 9.82 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.5 ppb
  • SO2: 0.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.41 µg/m³
  • PM10: 10.74 µg/m³
  • O3: 0.040 ppm
  • NO2: 2.1 ppb
  • SO2: 0.8 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.8 µg/m³
  • PM10: 11.19 µg/m³
  • O3: 0.038 ppm
  • NO2: 2.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.05 µg/m³
  • PM10: 11.53 µg/m³
  • O3: 0.032 ppm
  • NO2: 3.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.44 µg/m³
  • PM10: 12.06 µg/m³
  • O3: 0.028 ppm
  • NO2: 5.4 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.85 µg/m³
  • PM10: 12.58 µg/m³
  • O3: 0.026 ppm
  • NO2: 6.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.73 µg/m³
  • PM10: 13.53 µg/m³
  • O3: 0.023 ppm
  • NO2: 7.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Appleton

Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued August 12 at 6:08AM CDT by NWS Green Bay WI
Aug 12, 6:08 AM Aug 12, 9:00 AM
Patchy dense fog, with visibility less than one-half mile at
times, has developed over portions of the area this morning. The
fog is expected to lift quickly after 8 AM.

If you encounter dense fog while driving this morning, be sure to
use your low-beam headlights and maintain plenty of distance
between your vehicle and other vehicles.
Updated: Aug 12, 7:31 AM Source: NWS Alert