TODAY JUN25
TEMPERATURE72
HUMIDITY91
PRESSURE29.89
WIND COND.110 11.4
  • 8163Tue30%
  • 8769Wed
  • 9175Thu30%
  • 9271Fri40%
  • 8767Sat30%50%
daynightWeather update from Sioux City, Sioux Gateway Airport at

Sioux City Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January-20°F64°F21°F0.3"
February-16°F66°F24°F0.5"
March-6°F84°F37°F1.6"
April14°F93°F50°F3.6"
May27°F98°F63°F2.9"
June44°F100°F72°F3.9"
July49°F102°F76°F3.3"
August45°F98°F73°F4.7"
September29°F97°F64°F3.9"
October18°F93°F50°F3.6"
November5°F82°F39°F0.8"
December-19°F58°F21°F1.9"

Did you know?

  • The highest monthly average temperature in Sioux City for July is 76 degrees.
  • The lowest monthly average temperature in Sioux City for January is 21 degrees.
  • The most monthly precipitation in Sioux City occurs in August with 4.7 inches.
  • The air quality index in Sioux City is 17% better than the national average.
  • The pollution index in Sioux City is 92% better than the national average.

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Compare Sioux City, IA Weather To Other Cities

Sioux City air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexSioux CityIowaNational
Air quality index413950
Pollution index397,2671,643,8365,066,862

Sioux City air quality information

MeasurementTotal
Days measured365
Days with good air quality254
Days with moderate air quality110
Days w/ poor A.Q. for sensitive groups1
Days with unhealthy air quality

Sioux City air quality information

PollutantTotal
Arsenic0.000%
Benzene0.010%
Carbon Tetrachloride0.001%
Lead0.000%
Mercury0.000%

Average monthly Sioux City temperature with heat index

Sioux City monthly precipitation with daily maximum

Sioux City monthly snow depth with daily maximum

Sioux City monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Hinton, IA8094118%
Dakota City, NE1,8754118%
South Sioux City, NE13,2684118%
North Sioux City, SD2,6234118%
Lawton, IA9004118%
Sioux City, IA82,6664118%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Redwood City, CA82,595484%
Hemet, CA82,7488570%
Buena Park, CA82,7717448%
Town 'n' Country, FL82,5544314%
Santa Fe, NM82,9274118%
Sioux City, IA82,6664118%
Source: The Sioux City, IA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.