Best year time to visit South Sioux City

General weather information about South Sioux City

Average annual temperature is 10.8 °C

Absolute maximum temperature: 38.4 °C

Absolute minimum temperature: -24.6 °C

Number of sunny days: 221 days

Number of rainy days: 116 days

Number of snow days: 28 days

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* Weather data for South Sioux City United States is based on climate observations for 2026 year

South Sioux City air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)4.812.620.029.330.933.536.938.435.731.818.611.8
Average daytime temperature (°C)-2.52.27.016.925.729.929.830.227.317.010.85.0
Average temperature (°C)-6.2-4.20.39.918.823.823.724.321.311.95.00.5
Average night temperature (°C)-9.6-8.6-4.14.212.718.018.219.216.37.90.6-3.0
Absolute minimum temperature (°C)-24.6-24.2-12.9-5.72.411.310.212.010.5-6.4-8.5-8.8

South Sioux City monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.510.611.913.414.615.214.913.912.511.19.89.1
Daylight minimum duration (h)9.09.011.012.014.015.014.013.011.010.09.09.0
Sunshine mean duration (h)4.36.97.89.611.512.912.011.610.17.57.05.3
Precipitation (mm)784133376061957956163358
Sunny days191820161918121918142523
Rainy days5441112121912121546
Snow days767300000212

South Sioux City - weather forecast by months

South Sioux City weather in januarySouth Sioux City weather in februarySouth Sioux City weather in marchSouth Sioux City weather in aprilSouth Sioux City weather in maySouth Sioux City weather in juneSouth Sioux City weather in julySouth Sioux City weather in augustSouth Sioux City weather in septemberSouth Sioux City weather in octoberSouth Sioux City weather in novemberSouth Sioux City weather in december

Best time to visit South Sioux City:

The best time to visit South Sioux City during the most sunny months:

  • May — 11.5(h)
  • June — 12.9(h)
  • July — 12.0(h)
  • August — 11.6(h)

The largest precipitation sum in South Sioux City is at

  • July — 95(mm)
  • October — 163(mm)

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    Frequently asked questions

    When is the best time to visit South Sioux City?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit South Sioux City.
    What is the weather like in South Sioux City?
    See average temperature, rainfall and daylight hours for South Sioux City by month in the table above.
    How many sunny days does South Sioux City have?
    The monthly weather statistics above show sunshine and rainfall patterns for South Sioux City throughout the year.