Hourly Weather | Today Tuesday, July 21, 2026
Sioux City, Iowa
3 AM
Cloudy Night
72°
Feels Like 70°
47
Humidity: 64%
UV Index: 0
Wind: 7 mph
4 AM
Night
70°
Feels Like 68°
35
Humidity: 64%
UV Index: 0
Wind: 7 mph
5 AM
Night
70°
Feels Like 66°
19
Humidity: 66%
UV Index: 0
Wind: 7 mph
6 AM
Night
66°
Feels Like 64°
19
Humidity: 71%
UV Index: 0
Wind: 7 mph
7 AM
Cloudy Weather
66°
Feels Like 64°
13
Humidity: 76%
UV Index: 1
Wind: 7 mph
8 AM
Sunny Weather
68°
Feels Like 68°
0
Humidity: 72%
UV Index: 2
Wind: 8 mph
9 AM
Sunny Weather
72°
Feels Like 73°
0
Humidity: 65%
UV Index: 3
Wind: 10 mph
10 AM
Cloudy Weather
75°
Feels Like 79°
0
Humidity: 59%
UV Index: 5
Wind: 12 mph
11 AM
Cloudy Weather
79°
Feels Like 82°
0
Humidity: 53%
UV Index: 7
Wind: 13 mph
12 PM
Cloudy Weather
81°
Feels Like 84°
0
Humidity: 49%
UV Index: 9
Wind: 13 mph
1 PM
Cloudy Weather
82°
Feels Like 86°
0
Humidity: 45%
UV Index: 10
Wind: 13 mph
2 PM
Cloudy Weather
84°
Feels Like 88°
0
Humidity: 41%
UV Index: 9
Wind: 13 mph
3 PM
Cloudy Weather
84°
Feels Like 88°
0
Humidity: 38%
UV Index: 7
Wind: 13 mph
4 PM
Cloudy Weather
86°
Feels Like 86°
0
Humidity: 36%
UV Index: 5
Wind: 13 mph
5 PM
Cloudy Weather
88°
Feels Like 86°
0
Humidity: 34%
UV Index: 3
Wind: 13 mph
6 PM
Cloudy Weather
86°
Feels Like 84°
0
Humidity: 34%
UV Index: 2
Wind: 12 mph
7 PM
Cloudy Weather
84°
Feels Like 82°
0
Humidity: 35%
UV Index: 1
Wind: 12 mph
8 PM
Cloudy Weather
82°
Feels Like 79°
0
Humidity: 36%
UV Index: 0
Wind: 10 mph
9 PM
Cloudy Night
79°
Feels Like 75°
0
Humidity: 43%
UV Index: 0
Wind: 8 mph
10 PM
Cloudy Night
75°
Feels Like 72°
0
Humidity: 50%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 56%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

3 AM
43 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.28 µg/m³
  • PM10: 10.62 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

4 AM
52 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.79 µg/m³
  • PM10: 13.11 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.2 ppb
  • SO2: 0.1 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 AM
54 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.79 µg/m³
  • PM10: 14.07 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.2 ppb
  • SO2: 0.1 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 AM
52 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.1 µg/m³
  • PM10: 13.32 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.2 ppb
  • SO2: 0.1 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.

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

Pollutant Concentrations:

  • PM2.5: 10.82 µg/m³
  • PM10: 10.99 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

8 AM
33 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.89 µg/m³
  • PM10: 8 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.1 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 AM
29 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.83 µg/m³
  • PM10: 5.92 µg/m³
  • O3: 0.032 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.33 µg/m³
  • PM10: 4.4 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.92 µg/m³
  • PM10: 2.97 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.47 µg/m³
  • PM10: 2.51 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.33 µg/m³
  • PM10: 2.36 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.15 µg/m³
  • PM10: 2.18 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.99 µg/m³
  • PM10: 2.02 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.81 µg/m³
  • PM10: 1.84 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.7 µg/m³
  • PM10: 1.72 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.64 µg/m³
  • PM10: 1.66 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.55 µg/m³
  • PM10: 1.58 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.47 µg/m³
  • PM10: 1.51 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.4 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.42 µg/m³
  • PM10: 1.47 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.6 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.39 µg/m³
  • PM10: 1.45 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.41 µg/m³
  • PM10: 1.47 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.8 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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