Hourly Weather | Today Monday, September 21, 2026
Brookings, South Dakota
2 PM
Rainy Weather
55°
Feels Like 48°
63
Humidity: 83%
UV Index: 1
Wind: 11 mph
3 PM
Cloudy Weather
55°
Feels Like 52°
49
Humidity: 81%
UV Index: 2
Wind: 11 mph
4 PM
Cloudy Weather
55°
Feels Like 54°
49
Humidity: 78%
UV Index: 1
Wind: 11 mph
5 PM
Partly Sunny with Showers
55°
Feels Like 48°
66
Humidity: 81%
UV Index: 1
Wind: 11 mph
6 PM
Cloudy Weather
54°
Feels Like 50°
49
Humidity: 83%
UV Index: 0
Wind: 11 mph
7 PM
Partly Sunny with Showers
52°
Feels Like 45°
66
Humidity: 87%
UV Index: 0
Wind: 9 mph
8 PM
Cloudy Weather
52°
Feels Like 46°
25
Humidity: 89%
UV Index: 0
Wind: 9 mph
9 PM
Cloudy Weather
50°
Feels Like 46°
20
Humidity: 95%
UV Index: 0
Wind: 8 mph
10 PM
Cloudy Weather
50°
Feels Like 46°
20
Humidity: 92%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Weather
52°
Feels Like 48°
20
Humidity: 92%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 0.88 µg/m³
  • PM10: 0.95 µg/m³
  • O3: 0.023 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 PM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.84 µg/m³
  • PM10: 0.92 µg/m³
  • O3: 0.024 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.79 µg/m³
  • PM10: 0.86 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.74 µg/m³
  • PM10: 0.83 µg/m³
  • O3: 0.026 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.

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

Pollutant Concentrations:

  • PM2.5: 0.74 µg/m³
  • PM10: 0.84 µg/m³
  • O3: 0.026 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.

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

Pollutant Concentrations:

  • PM2.5: 0.73 µg/m³
  • PM10: 0.84 µg/m³
  • O3: 0.025 ppm
  • NO2: 1.3 ppb
  • SO2: 0 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.73 µg/m³
  • PM10: 0.84 µg/m³
  • O3: 0.023 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.

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

Pollutant Concentrations:

  • PM2.5: 0.72 µg/m³
  • PM10: 0.84 µg/m³
  • O3: 0.022 ppm
  • NO2: 1.5 ppb
  • SO2: 0 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.71 µg/m³
  • PM10: 0.84 µg/m³
  • O3: 0.021 ppm
  • NO2: 1.5 ppb
  • SO2: 0 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.7 µg/m³
  • PM10: 0.83 µg/m³
  • O3: 0.020 ppm
  • NO2: 1.6 ppb
  • SO2: 0 ppb
  • CO: 0.15 ppm

Health Recommendations:

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