Today | Weather | Wednesday, September 9, 2026

Weather in Sioux City, Iowa

07:57 PM
Now
Cloudy Night
72° F
Feels Like 70°
Precipitation 0 %
Wind 6 mph
Humidity 60 %
Today
Cloudy Weather
Day 84°
Night 50°
Precipitation 25 %
Wind 7 mph
UV Index (0 - 11+) 6

Sioux City Weather Forecast Updated

Last updated on

Air Quality in Sioux City

NOW
26 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.85 µg/m³
PM10 2.32 µg/m³
O3 0.028 ppm
NO2 1.3 ppb
SO2 0 ppb
CO 0.12 ppm
NH3 3.24 µg/m³
NO 0.02 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)
PM2.51.85 µg/m³
PM102.32 µg/m³
O355.79 µg/m³
NO22.49 µg/m³
SO20.08 µg/m³
CO137.56 µg/m³
NH33.24 µg/m³
NO0.02 µg/m³