Today | Weather | Tuesday, September 1, 2026

Weather in Sioux City, Iowa

10:26 AM
Now
Cloudy Weather
77° F
Feels Like 84°
Precipitation 40 %
Wind 6 mph
UV Index (0 - 11+) 2
Humidity 85 %
Today
Stormy Weather
Day 90°
Night 66°
Precipitation 61 %
Wind 6 mph
UV Index (0 - 11+) 5

Sioux City Weather Forecast Updated

15 minutes ago
Last updated on

Air Quality in Sioux City

NOW
24 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 5.69 µg/m³
PM10 6.42 µg/m³
O3 0.015 ppm
NO2 1.7 ppb
SO2 0.1 ppb
CO 0.13 ppm
NH3 2.84 µg/m³
NO 1.23 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)
PM2.55.69 µg/m³
PM106.42 µg/m³
O328.79 µg/m³
NO23.13 µg/m³
SO20.22 µg/m³
CO145.42 µg/m³
NH32.84 µg/m³
NO1.23 µg/m³