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Climate & Weather Averages in Sioux City, Iowa, USA

Currently: 49 °F. Clear. (Weather station: Sioux City Sioux Gateway Airport, USA). See more current weather

Annual Weather Averages Near Sioux City

Averages are for Sioux City Sioux Gateway Airport, which is 6 miles from Sioux City.

Based on weather reports collected during 1992–2021.

All Year Climate & Weather Averages in Sioux City

High Temp: 86 °F

Low Temp: 11 °F

Mean Temp: 49 °F

Precipitation: 2.34"

Humidity: 70%

Dew Point: 39 °F

Wind: 16 mph

Pressure: 30.04 "Hg

Visibility: 9 mi

January Climate & Weather Averages in Sioux City

High Temp: 30 °F

Low Temp: 11 °F

Mean Temp: 21 °F

Precipitation: 0.71"

Humidity: 77%

Dew Point: 15 °F

Wind: 17 mph

Pressure: 30.16 "Hg

Visibility: 9 mi

February Climate & Weather Averages in Sioux City

High Temp: 34 °F

Low Temp: 15 °F

Mean Temp: 25 °F

Precipitation: 0.79"

Humidity: 75%

Dew Point: 18 °F

Wind: 17 mph

Pressure: 30.15 "Hg

Visibility: 9 mi

March Climate & Weather Averages in Sioux City

High Temp: 48 °F

Low Temp: 26 °F

Mean Temp: 37 °F

Precipitation: 1.65"

Humidity: 69%

Dew Point: 27 °F

Wind: 18 mph

Pressure: 30.09 "Hg

Visibility: 9 mi

April Climate & Weather Averages in Sioux City

High Temp: 61 °F

Low Temp: 36 °F

Mean Temp: 49 °F

Precipitation: 2.84"

Humidity: 62%

Dew Point: 36 °F

Wind: 19 mph

Pressure: 29.99 "Hg

Visibility: 10 mi

May Climate & Weather Averages in Sioux City

High Temp: 72 °F

Low Temp: 49 °F

Mean Temp: 60 °F

Precipitation: 3.96"

Humidity: 63%

Dew Point: 47 °F

Wind: 18 mph

Pressure: 29.95 "Hg

Visibility: 10 mi

June Climate & Weather Averages in Sioux City

High Temp: 83 °F

Low Temp: 59 °F

Mean Temp: 71 °F

Precipitation: 3.86"

Humidity: 66%

Dew Point: 59 °F

Wind: 15 mph

Pressure: 29.90 "Hg

Visibility: 10 mi

July Climate & Weather Averages in Sioux City

High Temp: 86 °F

Low Temp: 64 °F

Mean Temp: 75 °F

Precipitation: 3.44"

Humidity: 73%

Dew Point: 65 °F

Wind: 12 mph

Pressure: 29.95 "Hg

Visibility: 10 mi

August Climate & Weather Averages in Sioux City

High Temp: 83 °F

Low Temp: 61 °F

Mean Temp: 72 °F

Precipitation: 3.80"

Humidity: 75%

Dew Point: 64 °F

Wind: 12 mph

Pressure: 29.98 "Hg

Visibility: 9 mi

September Climate & Weather Averages in Sioux City

High Temp: 77 °F

Low Temp: 51 °F

Mean Temp: 64 °F

Precipitation: 2.77"

Humidity: 69%

Dew Point: 54 °F

Wind: 14 mph

Pressure: 30.01 "Hg

Visibility: 10 mi

October Climate & Weather Averages in Sioux City

High Temp: 64 °F

Low Temp: 38 °F

Mean Temp: 51 °F

Precipitation: 2.09"

Humidity: 66%

Dew Point: 39 °F

Wind: 16 mph

Pressure: 30.04 "Hg

Visibility: 10 mi

November Climate & Weather Averages in Sioux City

High Temp: 48 °F

Low Temp: 25 °F

Mean Temp: 37 °F

Precipitation: 1.18"

Humidity: 70%

Dew Point: 27 °F

Wind: 16 mph

Pressure: 30.10 "Hg

Visibility: 9 mi

December Climate & Weather Averages in Sioux City

High Temp: 35 °F

Low Temp: 15 °F

Mean Temp: 25 °F

Precipitation: 0.95"

Humidity: 77%

Dew Point: 18 °F

Wind: 16 mph

Pressure: 30.12 "Hg

Visibility: 9 mi

Quick Climate Info

Hottest MonthJuly (75 °F avg)
Coldest MonthJanuary (21 °F avg)
Wettest MonthMay (3.96" avg)
Windiest MonthApril (19 mph avg)
Annual precip.28.02" (per year)

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