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Sioux City climate guide: monthly weather averages
The Sioux City, Iowa climate guide is perfect for planning your holiday. Monthly weather averages give the best indication of what the weather is usually like for every month of the year including figures for temperature, rainfall and sunshine.
Heat & Humidity index
- Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme
Metric (°C / mm) | Imperial (°F / inches)
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Sioux City weather map
To select an alternative destination in Iowa, please zoom out of the Sioux City weather map below. Can't find the Iowa weather destination you are after? Try the destination search.
Sioux City weather by month
Check the weather in Sioux City for a particular month by selecting from the list below.
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