Hourly Weather | Today Tuesday, September 1, 2026
Waterloo, Iowa
11 AM
Cloudy Weather
81°
Feels Like 93°
20
Humidity: 81%
UV Index: 3
Wind: 6 mph
12 PM
Cloudy Weather
84°
Feels Like 93°
20
Humidity: 74%
UV Index: 2
Wind: 6 mph
1 PM
Cloudy Weather
88°
Feels Like 99°
15
Humidity: 68%
UV Index: 3
Wind: 7 mph
2 PM
Cloudy Weather
88°
Feels Like 100°
5
Humidity: 66%
UV Index: 3
Wind: 7 mph
3 PM
Cloudy Weather
90°
Feels Like 102°
5
Humidity: 60%
UV Index: 5
Wind: 6 mph
4 PM
Cloudy Weather
91°
Feels Like 102°
6
Humidity: 57%
UV Index: 4
Wind: 6 mph
5 PM
Cloudy Weather
90°
Feels Like 99°
7
Humidity: 60%
UV Index: 2
Wind: 6 mph
6 PM
Sunny Weather
88°
Feels Like 97°
7
Humidity: 64%
UV Index: 1
Wind: 6 mph
7 PM
Sunny Weather
86°
Feels Like 95°
11
Humidity: 71%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
82°
Feels Like 90°
24
Humidity: 78%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
79°
Feels Like 86°
24
Humidity: 84%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
77°
Feels Like 82°
29
Humidity: 87%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
75°
Feels Like 81°
47
Humidity: 91%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 6.81 µg/m³
  • PM10: 7.31 µg/m³
  • O3: 0.029 ppm
  • NO2: 1 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.66 µg/m³
  • PM10: 8.14 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.52 µg/m³
  • PM10: 8.99 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.63 µg/m³
  • PM10: 9.09 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.43 µg/m³
  • PM10: 7.91 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

4 PM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.42 µg/m³
  • PM10: 6.92 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.97 µg/m³
  • PM10: 6.52 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.86 µg/m³
  • PM10: 6.47 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

7 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.8 µg/m³
  • PM10: 6.46 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.74 µg/m³
  • PM10: 6.43 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.67 µg/m³
  • PM10: 6.29 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.58 µg/m³
  • PM10: 6.1 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.57 µg/m³
  • PM10: 6 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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