Hourly Weather | Today Wednesday, August 12, 2026
Active Weather Warnings
Sioux City, Iowa
8 AM
Cloudy Weather
73°
Feels Like 79°
1
Humidity: 91%
UV Index: 1
Wind: 9 mph
9 AM
Cloudy Weather
75°
Feels Like 82°
0
Humidity: 86%
UV Index: 3
Wind: 9 mph
10 AM
Cloudy Weather
77°
Feels Like 86°
0
Humidity: 83%
UV Index: 4
Wind: 9 mph
11 AM
Cloudy Weather
81°
Feels Like 90°
0
Humidity: 77%
UV Index: 5
Wind: 9 mph
12 PM
Cloudy Weather
82°
Feels Like 91°
0
Humidity: 70%
UV Index: 6
Wind: 9 mph
1 PM
Cloudy Weather
84°
Feels Like 93°
0
Humidity: 65%
UV Index: 6
Wind: 9 mph
2 PM
Cloudy Weather
86°
Feels Like 97°
0
Humidity: 61%
UV Index: 6
Wind: 9 mph
3 PM
Cloudy Weather
88°
Feels Like 97°
0
Humidity: 58%
UV Index: 6
Wind: 9 mph
4 PM
Cloudy Weather
90°
Feels Like 97°
0
Humidity: 55%
UV Index: 4
Wind: 9 mph
5 PM
Cloudy Weather
88°
Feels Like 95°
1
Humidity: 57%
UV Index: 3
Wind: 9 mph
6 PM
Cloudy Weather
88°
Feels Like 93°
1
Humidity: 59%
UV Index: 2
Wind: 9 mph
7 PM
Cloudy Weather
86°
Feels Like 90°
4
Humidity: 62%
UV Index: 1
Wind: 8 mph
8 PM
Cloudy Weather
82°
Feels Like 88°
29
Humidity: 69%
UV Index: 0
Wind: 8 mph
9 PM
Cloudy Weather
81°
Feels Like 84°
29
Humidity: 78%
UV Index: 0
Wind: 8 mph
10 PM
Cloudy Weather
77°
Feels Like 82°
35
Humidity: 84%
UV Index: 0
Wind: 8 mph
11 PM
Stormy Weather
75°
Feels Like 75°
70
Humidity: 87%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 8.58 µg/m³
  • PM10: 9.03 µg/m³
  • O3: 0.012 ppm
  • NO2: 1.5 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
37 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.78 µg/m³
  • PM10: 9.24 µg/m³
  • O3: 0.011 ppm
  • NO2: 1.2 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
39 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.24 µg/m³
  • PM10: 9.73 µg/m³
  • O3: 0.013 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.

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

Pollutant Concentrations:

  • PM2.5: 10.05 µg/m³
  • PM10: 10.58 µg/m³
  • O3: 0.022 ppm
  • NO2: 0.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.02 µg/m³
  • PM10: 11.55 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.7 ppb
  • SO2: 1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

1 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.4 µg/m³
  • PM10: 12.9 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.6 ppb
  • SO2: 1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.05 µg/m³
  • PM10: 12.54 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.6 ppb
  • SO2: 0.9 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.53 µg/m³
  • PM10: 11.02 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.6 ppb
  • SO2: 0.8 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.62 µg/m³
  • PM10: 10.12 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.7 ppb
  • SO2: 0.8 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.19 µg/m³
  • PM10: 9.71 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.9 ppb
  • SO2: 0.8 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.04 µg/m³
  • PM10: 9.6 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.1 ppb
  • SO2: 0.8 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.93 µg/m³
  • PM10: 9.54 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.2 ppb
  • SO2: 0.8 ppb
  • CO: 0.10 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.7 µg/m³
  • PM10: 9.35 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.4 ppb
  • SO2: 0.8 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.83 µg/m³
  • PM10: 9.48 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.6 ppb
  • SO2: 0.8 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.42 µg/m³
  • PM10: 10.04 µg/m³
  • O3: 0.030 ppm
  • NO2: 1.7 ppb
  • SO2: 0.9 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.93 µg/m³
  • PM10: 10.38 µg/m³
  • O3: 0.028 ppm
  • NO2: 1.6 ppb
  • SO2: 0.9 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Sioux City

Severe Future Possible

Severe Thunderstorm Watch

Severe Thunderstorm Watch issued August 12 at 6:06AM CDT until August 12 at 10:00AM CDT by NWS Sioux Falls SD
Aug 12, 6:06 AM Aug 12, 10:00 AM
SEVERE THUNDERSTORM WATCH 573 REMAINS VALID UNTIL 10 AM CDT THIS
MORNING FOR THE FOLLOWING AREAS

IN IOWA THIS WATCH INCLUDES 4 COUNTIES

IN NORTHWEST IOWA

BUENA VISTA CHEROKEE

IN WEST CENTRAL IOWA

IDA WOODBURY

THIS INCLUDES THE CITIES OF BATTLE CREEK, CHEROKEE, HOLSTEIN,
IDA GROVE, SIOUX CITY, AND STORM LAKE.
Updated: Aug 12, 6:09 AM Source: NWS Alert