Hourly Weather | Today Tuesday, April 7, 2026
Janesville, Wisconsin
8 AM
Cloudy Weather
27°
Feels Like 23°
0
Humidity: 54%
UV Index: 1
Wind: 8 mph
9 AM
Cloudy Weather
28°
Feels Like 27°
0
Humidity: 44%
UV Index: 2
Wind: 8 mph
10 AM
Cloudy Weather
32°
Feels Like 30°
0
Humidity: 36%
UV Index: 3
Wind: 8 mph
11 AM
Cloudy Weather
34°
Feels Like 36°
0
Humidity: 32%
UV Index: 5
Wind: 8 mph
12 PM
Cloudy Weather
37°
Feels Like 39°
0
Humidity: 28%
UV Index: 6
Wind: 9 mph
1 PM
Cloudy Weather
39°
Feels Like 43°
0
Humidity: 25%
UV Index: 6
Wind: 9 mph
2 PM
Cloudy Weather
43°
Feels Like 43°
0
Humidity: 25%
UV Index: 6
Wind: 9 mph
3 PM
Cloudy Weather
43°
Feels Like 43°
0
Humidity: 25%
UV Index: 5
Wind: 10 mph
4 PM
Cloudy Weather
45°
Feels Like 43°
0
Humidity: 26%
UV Index: 3
Wind: 10 mph
5 PM
Cloudy Weather
46°
Feels Like 43°
0
Humidity: 24%
UV Index: 2
Wind: 10 mph
6 PM
Cloudy Weather
45°
Feels Like 37°
0
Humidity: 26%
UV Index: 1
Wind: 12 mph
7 PM
Cloudy Weather
43°
Feels Like 36°
1
Humidity: 30%
UV Index: 0
Wind: 12 mph
8 PM
Cloudy Weather
39°
Feels Like 30°
7
Humidity: 34%
UV Index: 0
Wind: 12 mph
9 PM
Cloudy Weather
37°
Feels Like 28°
7
Humidity: 41%
UV Index: 0
Wind: 10 mph
10 PM
Cloudy Weather
36°
Feels Like 27°
6
Humidity: 47%
UV Index: 0
Wind: 10 mph
11 PM
Cloudy Weather
34°
Feels Like 25°
5
Humidity: 51%
UV Index: 0
Wind: 10 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 0.71 µg/m³
  • PM10: 1.01 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 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: 0.72 µg/m³
  • PM10: 1.08 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.9 µg/m³
  • PM10: 1.31 µg/m³
  • O3: 0.044 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.

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

Pollutant Concentrations:

  • PM2.5: 1.15 µg/m³
  • PM10: 1.53 µg/m³
  • O3: 0.048 ppm
  • NO2: 1 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 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: 1.7 µg/m³
  • PM10: 2.07 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.7 µg/m³
  • PM10: 3.09 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.87 µg/m³
  • PM10: 4.28 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.6 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 5.17 µg/m³
  • PM10: 5.63 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.6 ppb
  • SO2: 0.6 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.

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

Pollutant Concentrations:

  • PM2.5: 6.55 µg/m³
  • PM10: 7.06 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.7 ppb
  • SO2: 0.7 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
77 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.85 µg/m³
  • PM10: 8.42 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.8 ppb
  • SO2: 0.9 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.

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

Pollutant Concentrations:

  • PM2.5: 8.85 µg/m³
  • PM10: 9.47 µg/m³
  • O3: 0.063 ppm
  • NO2: 1.1 ppb
  • SO2: 1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.31 µg/m³
  • PM10: 9.96 µg/m³
  • O3: 0.061 ppm
  • NO2: 1.6 ppb
  • SO2: 1.1 ppb
  • CO: 0.14 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: 9.35 µg/m³
  • PM10: 10.04 µg/m³
  • O3: 0.060 ppm
  • NO2: 1.9 ppb
  • SO2: 1.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

9 PM
61 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.23 µg/m³
  • PM10: 9.95 µg/m³
  • O3: 0.058 ppm
  • NO2: 2.1 ppb
  • SO2: 1.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

10 PM
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.95 µg/m³
  • PM10: 9.69 µg/m³
  • O3: 0.055 ppm
  • NO2: 2.4 ppb
  • SO2: 1.2 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.

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

Pollutant Concentrations:

  • PM2.5: 8.44 µg/m³
  • PM10: 9.16 µg/m³
  • O3: 0.052 ppm
  • NO2: 2.5 ppb
  • SO2: 1.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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