Today | Weather | Tuesday, October 21, 2025

Weather in Sioux Falls, South Dakota

09:08 PM
Now
Night
41° F
Feels Like 39°
Precipitation 0 %
Wind 6 mph
Humidity 65 %
Today
Night
Day 52°
Night 32°
Precipitation 1 %
Wind 5 mph

Sioux Falls Weather Forecast Updated

30 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (October 21, 2024)

Cloudy Night

Day

82°

Night

52°

Wind

11 mph

Precipitation

40

Air Quality in Sioux Falls

NOW
34 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.51 µg/m³
PM10 0.73 µg/m³
O3 0.037 ppm
NO2 0.7 ppb
SO2 0 ppb
CO 0.09 ppm
NH3 2.08 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)
PM2.50.51 µg/m³
PM100.73 µg/m³
O372.12 µg/m³
NO21.32 µg/m³
SO20.1 µg/m³
CO106.52 µg/m³
NH32.08 µg/m³
NO0 µg/m³