Hourly Weather | Today Monday, April 27, 2026
Watertown, South Dakota
8 PM
Cloudy Weather
39°
Feels Like 27°
11
Humidity: 85%
UV Index: 0
Wind: 19 mph
9 PM
Cloudy Weather
39°
Feels Like 27°
11
Humidity: 85%
UV Index: 0
Wind: 16 mph
10 PM
Cloudy Weather
39°
Feels Like 27°
11
Humidity: 84%
UV Index: 0
Wind: 14 mph
11 PM
Cloudy Night
37°
Feels Like 27°
11
Humidity: 84%
UV Index: 0
Wind: 14 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.048 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
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.048 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.

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.048 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.

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.5 µg/m³
  • O3: 0.046 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.