Hourly Weather | Today Wednesday, February 25, 2026
Sioux Falls, South Dakota
1 AM
Cloudy Night
27°
Feels Like 21°
14
Frost Risk: 88%
Humidity: 86%
UV Index: 0
Wind: 6 mph
2 AM
Cloudy Night
25°
Feels Like 21°
14
Frost Risk: 98%
Humidity: 90%
UV Index: 0
Wind: 6 mph
3 AM
Cloudy Night
27°
Feels Like 21°
14
Frost Risk: 77%
Humidity: 89%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
25°
Feels Like 21°
14
Frost Risk: 99%
Humidity: 90%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
25°
Feels Like 19°
14
Frost Risk: 98%
Humidity: 91%
UV Index: 0
Wind: 6 mph
6 AM
Cloudy Night
21°
Feels Like 18°
9
Frost Risk: 100%
Humidity: 94%
UV Index: 0
Wind: 7 mph
7 AM
Cloudy Night
25°
Feels Like 19°
0
Frost Risk: 100%
Humidity: 86%
UV Index: 0
Wind: 7 mph
8 AM
Cloudy Weather
27°
Feels Like 21°
0
Frost Risk: 97%
Humidity: 81%
UV Index: 1
Wind: 8 mph
9 AM
Cloudy Weather
30°
Feels Like 27°
0
Humidity: 72%
UV Index: 2
Wind: 9 mph
10 AM
Cloudy Weather
36°
Feels Like 32°
0
Humidity: 62%
UV Index: 3
Wind: 10 mph
11 AM
Cloudy Weather
43°
Feels Like 39°
0
Humidity: 53%
UV Index: 3
Wind: 12 mph
12 PM
Cloudy Weather
45°
Feels Like 43°
0
Humidity: 47%
UV Index: 4
Wind: 13 mph
1 PM
Cloudy Weather
48°
Feels Like 45°
0
Humidity: 41%
UV Index: 3
Wind: 14 mph
2 PM
Cloudy Weather
50°
Feels Like 45°
0
Humidity: 37%
UV Index: 3
Wind: 15 mph
3 PM
Cloudy Weather
52°
Feels Like 46°
0
Humidity: 34%
UV Index: 2
Wind: 15 mph
4 PM
Cloudy Weather
52°
Feels Like 46°
0
Humidity: 33%
UV Index: 1
Wind: 14 mph
5 PM
Cloudy Weather
50°
Feels Like 45°
0
Humidity: 36%
UV Index: 0
Wind: 10 mph
6 PM
Cloudy Weather
45°
Feels Like 39°
0
Humidity: 42%
UV Index: 0
Wind: 8 mph
7 PM
Night
43°
Feels Like 39°
0
Humidity: 47%
UV Index: 0
Wind: 7 mph
8 PM
Night
39°
Feels Like 36°
0
Humidity: 53%
UV Index: 0
Wind: 6 mph
9 PM
Night
37°
Feels Like 34°
0
Humidity: 59%
UV Index: 0
Wind: 6 mph
10 PM
Night
36°
Feels Like 34°
0
Humidity: 61%
UV Index: 0
Wind: 6 mph
11 PM
Night
34°
Feels Like 30°
0
Humidity: 64%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

1 AM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.75 µg/m³
  • PM10: 1.02 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.2 ppb
  • SO2: 0 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

2 AM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.7 µg/m³
  • PM10: 0.98 µg/m³
  • O3: 0.040 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

3 AM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.66 µg/m³
  • PM10: 0.95 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

4 AM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.68 µg/m³
  • PM10: 0.98 µg/m³
  • O3: 0.039 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

5 AM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.87 µg/m³
  • PM10: 1.18 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.2 ppb
  • SO2: 0 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.14 µg/m³
  • PM10: 1.47 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.4 ppb
  • SO2: 0 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.46 µg/m³
  • PM10: 1.82 µg/m³
  • O3: 0.032 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.

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

Pollutant Concentrations:

  • PM2.5: 1.78 µg/m³
  • PM10: 2.16 µg/m³
  • O3: 0.031 ppm
  • NO2: 2.3 ppb
  • SO2: 0 ppb
  • CO: 0.16 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: 2.02 µg/m³
  • PM10: 2.39 µg/m³
  • O3: 0.031 ppm
  • NO2: 2.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.97 µg/m³
  • PM10: 2.27 µg/m³
  • O3: 0.035 ppm
  • NO2: 2 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.83 µg/m³
  • PM10: 2.13 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.7 ppb
  • SO2: 0.1 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: 1.75 µg/m³
  • PM10: 2.06 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.5 µg/m³
  • PM10: 1.83 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 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: 1.34 µg/m³
  • PM10: 1.67 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.33 µg/m³
  • PM10: 1.64 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.43 µg/m³
  • PM10: 1.73 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.68 µg/m³
  • PM10: 1.95 µg/m³
  • O3: 0.042 ppm
  • NO2: 2.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.06 µg/m³
  • PM10: 2.33 µg/m³
  • O3: 0.041 ppm
  • NO2: 3 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.57 µg/m³
  • PM10: 2.86 µg/m³
  • O3: 0.040 ppm
  • NO2: 3.5 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 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: 3 µg/m³
  • PM10: 3.36 µg/m³
  • O3: 0.039 ppm
  • NO2: 3.7 ppb
  • SO2: 1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.42 µg/m³
  • PM10: 3.82 µg/m³
  • O3: 0.038 ppm
  • NO2: 3.7 ppb
  • SO2: 0.9 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.64 µg/m³
  • PM10: 4.07 µg/m³
  • O3: 0.037 ppm
  • NO2: 3.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.06 µg/m³
  • PM10: 4.54 µg/m³
  • O3: 0.035 ppm
  • NO2: 3.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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