Hourly Weather | Today Thursday, February 26, 2026
Sioux City, Iowa
1 AM
Cloudy Night
27°
Feels Like 21°
15
Frost Risk: 84%
Humidity: 87%
UV Index: 0
Wind: 6 mph
2 AM
Cloudy Night
27°
Feels Like 21°
15
Frost Risk: 84%
Humidity: 90%
UV Index: 0
Wind: 6 mph
3 AM
Cloudy Night
25°
Feels Like 21°
15
Frost Risk: 100%
Humidity: 99%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
25°
Feels Like 19°
15
Frost Risk: 99%
Humidity: 100%
UV Index: 0
Wind: 7 mph
5 AM
Cloudy Night
23°
Feels Like 16°
15
Frost Risk: 100%
Humidity: 100%
UV Index: 0
Wind: 8 mph
6 AM
Cloudy Night
23°
Feels Like 16°
10
Frost Risk: 100%
Humidity: 100%
UV Index: 0
Wind: 8 mph
7 AM
Cloudy Night
21°
Feels Like
0
Frost Risk: 100%
Humidity: 100%
UV Index: 0
Wind: 17 mph
8 AM
Cloudy Weather
25°
Feels Like
0
Frost Risk: 100%
Humidity: 98%
UV Index: 1
Wind: 17 mph
9 AM
Cloudy Weather
30°
Feels Like 18°
0
Frost Risk: 61%
Humidity: 83%
UV Index: 2
Wind: 17 mph
10 AM
Cloudy Weather
36°
Feels Like 27°
0
Humidity: 68%
UV Index: 3
Wind: 17 mph
11 AM
Cloudy Weather
45°
Feels Like 37°
0
Humidity: 50%
UV Index: 3
Wind: 17 mph
12 PM
Cloudy Weather
52°
Feels Like 46°
0
Humidity: 38%
UV Index: 4
Wind: 18 mph
1 PM
Cloudy Weather
55°
Feels Like 55°
0
Humidity: 32%
UV Index: 3
Wind: 10 mph
2 PM
Cloudy Weather
57°
Feels Like 55°
0
Humidity: 28%
UV Index: 3
Wind: 14 mph
3 PM
Cloudy Weather
63°
Feels Like 59°
0
Humidity: 24%
UV Index: 2
Wind: 16 mph
4 PM
Cloudy Weather
61°
Feels Like 55°
0
Humidity: 25%
UV Index: 1
Wind: 14 mph
5 PM
Cloudy Weather
57°
Feels Like 54°
0
Humidity: 27%
UV Index: 0
Wind: 10 mph
6 PM
Cloudy Weather
54°
Feels Like 48°
0
Humidity: 32%
UV Index: 0
Wind: 9 mph
7 PM
Cloudy Night
48°
Feels Like 45°
0
Humidity: 38%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
45°
Feels Like 41°
0
Humidity: 43%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
41°
Feels Like 37°
0
Humidity: 48%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
37°
Feels Like 34°
0
Humidity: 54%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
36°
Feels Like 30°
0
Humidity: 60%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

1 AM
29 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.91 µg/m³
  • PM10: 8.16 µg/m³
  • O3: 0.021 ppm
  • NO2: 6.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

2 AM
31 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.38 µg/m³
  • PM10: 8.65 µg/m³
  • O3: 0.020 ppm
  • NO2: 6.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.06 µg/m³
  • PM10: 9.25 µg/m³
  • O3: 0.020 ppm
  • NO2: 5.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

4 AM
39 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.37 µg/m³
  • PM10: 10.42 µg/m³
  • O3: 0.021 ppm
  • NO2: 5.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.03 µg/m³
  • PM10: 12.01 µg/m³
  • O3: 0.019 ppm
  • NO2: 5.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.22 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.18 µg/m³
  • PM10: 12.05 µg/m³
  • O3: 0.019 ppm
  • NO2: 5.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.71 µg/m³
  • PM10: 9.44 µg/m³
  • O3: 0.023 ppm
  • NO2: 4.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.27 µg/m³
  • PM10: 5.95 µg/m³
  • O3: 0.027 ppm
  • NO2: 3.5 ppb
  • SO2: 0 ppb
  • CO: 0.18 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: 2.67 µg/m³
  • PM10: 3.34 µg/m³
  • O3: 0.031 ppm
  • NO2: 2.6 ppb
  • SO2: 0 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.55 µg/m³
  • PM10: 2.2 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.8 ppb
  • SO2: 0 ppb
  • CO: 0.15 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: 1.36 µg/m³
  • PM10: 1.98 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.4 ppb
  • SO2: 0 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.51 µg/m³
  • PM10: 2.11 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.1 ppb
  • SO2: 0 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.66 µg/m³
  • PM10: 2.37 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.8 µg/m³
  • PM10: 2.6 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.51 µg/m³
  • PM10: 2.21 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.3 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 PM
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.25 µg/m³
  • PM10: 1.82 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.25 µg/m³
  • PM10: 1.83 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.4 ppb
  • SO2: 0 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.3 µg/m³
  • PM10: 1.98 µg/m³
  • O3: 0.045 ppm
  • NO2: 2.6 ppb
  • SO2: 0 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.45 µg/m³
  • PM10: 2.26 µg/m³
  • O3: 0.042 ppm
  • NO2: 3.3 ppb
  • SO2: 0 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.67 µg/m³
  • PM10: 2.6 µg/m³
  • O3: 0.039 ppm
  • NO2: 3.7 ppb
  • SO2: 0 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.95 µg/m³
  • PM10: 2.95 µg/m³
  • O3: 0.037 ppm
  • NO2: 4 ppb
  • SO2: 0 ppb
  • CO: 0.17 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: 2.21 µg/m³
  • PM10: 3.22 µg/m³
  • O3: 0.033 ppm
  • NO2: 4.3 ppb
  • SO2: 0 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.46 µg/m³
  • PM10: 3.42 µg/m³
  • O3: 0.031 ppm
  • NO2: 4.7 ppb
  • SO2: 0 ppb
  • CO: 0.18 ppm

Health Recommendations:

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