Air Quality in Sioux City, United States
Cloudy
7.4°C · 85.4% humidity
7.4°
Feels 2.6°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Sioux City's air quality — share it
AQI Forecast
25
6am
25
25
25
9am
25
27
27
12pm
27
27
27
3pm
25
25
25
6pm
25
27
27
9pm
27
27
27
12am
25
25
25
3am
25
25
Sioux City's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Sioux City is 1.2× the WHO annual guideline of 5 µg/m³.
85.4%
Humidity
38.0 km/h
Wind ESE
1032.2 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.0 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Sioux City?
Temperature & Precipitation
PM2.56.0 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX5.9
High
What is the 7-day forecast for Sioux City?
05-29
31.7° 7.4°
05-30
23.8° 14.9°
1.13 mm
05-31
29.2° 11.6°
2.75 mm
06-01
26.1° 16.2°
3.81 mm
06-02
25.6° 17.2°
0.13 mm
06-03
31.5° 22.2°
06-04
25.1° 16.5°
1.19 mm
Both models agree
Avg diff: 3.7°C
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T14:36 UTC.