Today | Weather | Tuesday, October 21, 2025

Weather in Sioux Falls, South Dakota

09:08 PM

Now

41° F

Feels Like 39°

Precipitation 0 %

Wind 6 mph

Humidity 65 %

Today

Day 52°

Night 32°

Precipitation 1 %

Wind 5 mph

Sioux Falls Weather Forecast Updated

30 minutes ago

Last updated on October 21, 2025 8:38 PM

Weather Forecast History

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

Day

82°

Night

52°

Wind

11 mph

Precipitation

Air Quality in Sioux Falls

NOW

34 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 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

PM_2.5 – 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)

PM_2.5 – 0.51 µg/m³

PM₁₀ – 0.73 µg/m³

O₃ – 72.12 µg/m³

NO₂ – 1.32 µg/m³

SO₂ – 0.1 µg/m³

CO – 106.52 µg/m³

NH₃ – 2.08 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast